A collection of views, functions and procedures to help MySQL administrators get insight in to MySQL Database usage.
There are install files available for 5.6 and 5.7 respectively. To load these, you must position yourself within the directory that you downloaded to, as these top level files SOURCE individual files that are shared across versions in most cases (though not all).
The objects should all be created as the root user (but run with the privileges of the invoker).
For instance if you download to /tmp/mysql-sys/, and want to install the 5.6 version you should:
cd /tmp/mysql-sys/
mysql -u root -p < ./sys_56.sql
Or if you would like to log in to the client, and install the 5.7 version:
cd /tmp/mysql-sys/
mysql -u root -p
SOURCE ./sys_57.sql
Alternatively, you could just choose to load individual files based on your needs, but beware, certain objects have dependencies on other objects. You will need to ensure that these are also loaded.
Many of the views in the sys schema have both a command line user friendly format output, as well as tooling friendly versions of any view that contains formatted output duplicated as an x$ table.
The examples below show output for only the formatted views, and note where there is an x$ counterpart available.
Summarizes the output of the INFORMATION_SCHEMA.INNODB_BUFFER_PAGE table, aggregating by schema.
mysql> select * from innodb_buffer_stats_by_schema;
+--------------------------+------------+------------+-------+--------------+-----------+-------------+
| object_schema | allocated | data | pages | pages_hashed | pages_old | rows_cached |
+--------------------------+------------+------------+-------+--------------+-----------+-------------+
| mem30_trunk__instruments | 1.69 MiB | 510.03 KiB | 108 | 108 | 108 | 3885 |
| InnoDB System | 688.00 KiB | 351.62 KiB | 43 | 43 | 43 | 862 |
| mem30_trunk__events | 80.00 KiB | 21.61 KiB | 5 | 5 | 5 | 229 |
+--------------------------+------------+------------+-------+--------------+-----------+-------------+Summarizes the output of the INFORMATION_SCHEMA.INNODB_BUFFER_PAGE table, aggregating by schema and table name.
mysql> select * from innodb_buffer_stats_by_table;
+--------------------------+------------------------------------+------------+-----------+-------+--------------+-----------+-------------+
| object_schema | object_name | allocated | data | pages | pages_hashed | pages_old | rows_cached |
+--------------------------+------------------------------------+------------+-----------+-------+--------------+-----------+-------------+
| InnoDB System | SYS_COLUMNS | 128.00 KiB | 98.97 KiB | 8 | 8 | 8 | 1532 |
| InnoDB System | SYS_FOREIGN | 128.00 KiB | 55.48 KiB | 8 | 8 | 8 | 172 |
| InnoDB System | SYS_TABLES | 128.00 KiB | 56.18 KiB | 8 | 8 | 8 | 365 |
| InnoDB System | SYS_INDEXES | 112.00 KiB | 76.16 KiB | 7 | 7 | 7 | 1046 |
| mem30_trunk__instruments | agentlatencytime | 96.00 KiB | 28.83 KiB | 6 | 6 | 6 | 252 |
| mem30_trunk__instruments | binlogspaceusagedata | 96.00 KiB | 22.54 KiB | 6 | 6 | 6 | 196 |
| mem30_trunk__instruments | connectionsdata | 96.00 KiB | 36.68 KiB | 6 | 6 | 6 | 276 |
| mem30_trunk__instruments | connectionsmaxdata | 96.00 KiB | 31.88 KiB | 6 | 6 | 6 | 271 |
| mem30_trunk__instruments | cpuaverage | 96.00 KiB | 14.32 KiB | 6 | 6 | 6 | 55 |
| mem30_trunk__instruments | diskiototaldata | 96.00 KiB | 42.71 KiB | 6 | 6 | 6 | 152 |
| mem30_trunk__instruments | innodbopenfilesdata | 96.00 KiB | 32.61 KiB | 6 | 6 | 6 | 266 |
| mem30_trunk__instruments | innodbrowlocktimestatisticsdata | 96.00 KiB | 32.16 KiB | 6 | 6 | 6 | 261 |
| mem30_trunk__instruments | myisamkeybufferusagedata | 96.00 KiB | 25.99 KiB | 6 | 6 | 6 | 232 |
| mem30_trunk__instruments | mysqlprocessactivity | 96.00 KiB | 31.99 KiB | 6 | 6 | 6 | 252 |
| mem30_trunk__instruments | querycacheaveragefreeblocksizedata | 96.00 KiB | 27.00 KiB | 6 | 6 | 6 | 237 |
| mem30_trunk__instruments | querycacheaveragequerysizedata | 96.00 KiB | 38.29 KiB | 6 | 6 | 6 | 315 |
| mem30_trunk__instruments | querycachefragmentationdata | 96.00 KiB | 27.00 KiB | 6 | 6 | 6 | 237 |
| mem30_trunk__instruments | querycachememorydata | 96.00 KiB | 32.58 KiB | 6 | 6 | 6 | 278 |
| mem30_trunk__instruments | querycachequeriesincachedata | 96.00 KiB | 27.15 KiB | 6 | 6 | 6 | 238 |
| mem30_trunk__instruments | ramusagedata | 96.00 KiB | 15.02 KiB | 6 | 6 | 6 | 59 |
| mem30_trunk__instruments | slaverelaylogspaceusagedata | 96.00 KiB | 28.28 KiB | 6 | 6 | 6 | 249 |
| mem30_trunk__instruments | swapusagedata | 96.00 KiB | 15.02 KiB | 6 | 6 | 6 | 59 |
| InnoDB System | SYS_FIELDS | 80.00 KiB | 49.78 KiB | 5 | 5 | 5 | 1147 |
| InnoDB System | SYS_DATAFILES | 32.00 KiB | 3.97 KiB | 2 | 2 | 2 | 60 |
| InnoDB System | SYS_FOREIGN_COLS | 32.00 KiB | 7.43 KiB | 2 | 2 | 2 | 83 |
| InnoDB System | SYS_TABLESPACES | 32.00 KiB | 3.65 KiB | 2 | 2 | 2 | 56 |
| InnoDB System | SYS_IBUF_TABLE | 16.00 KiB | 0 bytes | 1 | 1 | 1 | 0 |
+--------------------------+------------------------------------+------------+-----------+-------+--------------+-----------+-------------+Shows the top IO consumers by thread, ordered by total latency.
mysql> select * from io_by_thread_by_latency;
+---------------------+-------+---------------+-------------+-------------+-------------+-----------+----------------+
| user | total | total_latency | min_latency | avg_latency | max_latency | thread_id | processlist_id |
+---------------------+-------+---------------+-------------+-------------+-------------+-----------+----------------+
| root@localhost | 11580 | 18.01 s | 429.78 ns | 1.12 ms | 181.07 ms | 25 | 6 |
| main | 1358 | 1.31 s | 475.02 ns | 2.27 ms | 350.70 ms | 1 | NULL |
| page_cleaner_thread | 654 | 147.44 ms | 588.12 ns | 225.44 us | 46.41 ms | 18 | NULL |
| io_write_thread | 131 | 107.75 ms | 8.60 us | 822.55 us | 27.69 ms | 8 | NULL |
| io_write_thread | 46 | 47.07 ms | 10.64 us | 1.02 ms | 16.90 ms | 9 | NULL |
| io_write_thread | 71 | 46.99 ms | 9.11 us | 661.81 us | 17.04 ms | 11 | NULL |
| io_log_thread | 20 | 21.01 ms | 14.25 us | 1.05 ms | 7.08 ms | 3 | NULL |
| srv_master_thread | 13 | 17.60 ms | 8.49 us | 1.35 ms | 9.99 ms | 16 | NULL |
| srv_purge_thread | 4 | 1.81 ms | 34.31 us | 452.45 us | 1.02 ms | 17 | NULL |
| io_write_thread | 19 | 951.39 us | 9.75 us | 50.07 us | 297.47 us | 10 | NULL |
| signal_handler | 3 | 218.03 us | 21.64 us | 72.68 us | 154.84 us | 19 | NULL |
+---------------------+-------+---------------+-------------+-------------+-------------+-----------+----------------+Shows the top global IO consumers by bytes usage by file.
mysql> SELECT * FROM io_global_by_file_by_bytes LIMIT 5;
+--------------------------------------------+------------+------------+-----------+-------------+---------------+-----------+------------+-----------+
| file | count_read | total_read | avg_read | count_write | total_written | avg_write | total | write_pct |
+--------------------------------------------+------------+------------+-----------+-------------+---------------+-----------+------------+-----------+
| @@datadir/ibdata1 | 147 | 4.27 MiB | 29.71 KiB | 3 | 48.00 KiB | 16.00 KiB | 4.31 MiB | 1.09 |
| @@datadir/mysql/proc.MYD | 347 | 85.35 KiB | 252 bytes | 111 | 19.08 KiB | 176 bytes | 104.43 KiB | 18.27 |
| @@datadir/ib_logfile0 | 6 | 68.00 KiB | 11.33 KiB | 8 | 4.00 KiB | 512 bytes | 72.00 KiB | 5.56 |
| /opt/mysql/5.5.33/share/english/errmsg.sys | 3 | 43.68 KiB | 14.56 KiB | 0 | 0 bytes | 0 bytes | 43.68 KiB | 0.00 |
| /opt/mysql/5.5.33/share/charsets/Index.xml | 1 | 17.89 KiB | 17.89 KiB | 0 | 0 bytes | 0 bytes | 17.89 KiB | 0.00 |
+--------------------------------------------+------------+------------+-----------+-------------+---------------+-----------+------------+-----------+Shows the top global IO consumers by latency by file.
mysql> select * from io_global_by_file_by_latency limit 5;
+-----------------------------------------------------------+-------+---------------+------------+--------------+-------------+---------------+------------+--------------+
| file | total | total_latency | count_read | read_latency | count_write | write_latency | count_misc | misc_latency |
+-----------------------------------------------------------+-------+---------------+------------+--------------+-------------+---------------+------------+--------------+
| @@datadir/sys/wait_classes_global_by_avg_latency_raw.frm~ | 24 | 451.99 ms | 0 | 0 ps | 4 | 108.07 us | 20 | 451.88 ms |
| @@datadir/sys/innodb_buffer_stats_by_schema_raw.frm~ | 24 | 379.84 ms | 0 | 0 ps | 4 | 108.88 us | 20 | 379.73 ms |
| @@datadir/sys/io_by_thread_by_latency_raw.frm~ | 24 | 379.46 ms | 0 | 0 ps | 4 | 101.37 us | 20 | 379.36 ms |
| @@datadir/ibtmp1 | 53 | 373.45 ms | 0 | 0 ps | 48 | 246.08 ms | 5 | 127.37 ms |
| @@datadir/sys/statement_analysis_raw.frm~ | 24 | 353.14 ms | 0 | 0 ps | 4 | 94.96 us | 20 | 353.04 ms |
+-----------------------------------------------------------+-------+---------------+------------+--------------+-------------+---------------+------------+--------------+Shows the top global IO consumer classes by bytes usage.
mysql> select * from io_global_by_wait_by_bytes;
+--------------------+--------+---------------+-------------+-------------+-------------+------------+------------+-----------+-------------+---------------+-------------+-----------------+
| event_name | total | total_latency | min_latency | avg_latency | max_latency | count_read | total_read | avg_read | count_write | total_written | avg_written | total_requested |
+--------------------+--------+---------------+-------------+-------------+-------------+------------+------------+-----------+-------------+---------------+-------------+-----------------+
| myisam/dfile | 163681 | 983.13 ms | 379.08 ns | 6.01 µs | 22.06 ms | 68737 | 127.31 MiB | 1.90 KiB | 1012221 | 121.52 MiB | 126 bytes | 248.83 MiB |
| myisam/kfile | 1775 | 375.13 ms | 1.02 µs | 211.34 µs | 35.15 ms | 54066 | 9.97 MiB | 193 bytes | 428257 | 12.40 MiB | 30 bytes | 22.37 MiB |
| sql/FRM | 57889 | 8.40 s | 19.44 ns | 145.05 µs | 336.71 ms | 8009 | 2.60 MiB | 341 bytes | 14675 | 2.91 MiB | 208 bytes | 5.51 MiB |
| sql/global_ddl_log | 164 | 75.96 ms | 5.72 µs | 463.19 µs | 7.43 ms | 20 | 80.00 KiB | 4.00 KiB | 76 | 304.00 KiB | 4.00 KiB | 384.00 KiB |
| sql/file_parser | 419 | 601.37 ms | 1.96 µs | 1.44 ms | 37.14 ms | 66 | 42.01 KiB | 652 bytes | 64 | 226.98 KiB | 3.55 KiB | 268.99 KiB |
| sql/binlog | 190 | 6.79 s | 1.56 µs | 35.76 ms | 4.21 s | 52 | 60.54 KiB | 1.16 KiB | 0 | 0 bytes | 0 bytes | 60.54 KiB |
| sql/ERRMSG | 5 | 2.03 s | 8.61 µs | 405.40 ms | 2.03 s | 3 | 51.82 KiB | 17.27 KiB | 0 | 0 bytes | 0 bytes | 51.82 KiB |
| mysys/charset | 3 | 196.52 µs | 17.61 µs | 65.51 µs | 137.33 µs | 1 | 17.83 KiB | 17.83 KiB | 0 | 0 bytes | 0 bytes | 17.83 KiB |
| sql/partition | 81 | 18.87 ms | 888.08 ns | 232.92 µs | 4.67 ms | 66 | 2.75 KiB | 43 bytes | 8 | 288 bytes | 36 bytes | 3.04 KiB |
| sql/dbopt | 329166 | 26.95 s | 2.06 µs | 81.89 µs | 178.71 ms | 0 | 0 bytes | 0 bytes | 9 | 585 bytes | 65 bytes | 585 bytes |
| sql/relaylog | 7 | 1.18 ms | 838.84 ns | 168.30 µs | 892.70 µs | 0 | 0 bytes | 0 bytes | 1 | 120 bytes | 120 bytes | 120 bytes |
| mysys/cnf | 5 | 171.61 µs | 303.26 ns | 34.32 µs | 115.21 µs | 3 | 56 bytes | 19 bytes | 0 | 0 bytes | 0 bytes | 56 bytes |
| sql/pid | 3 | 220.55 µs | 29.29 µs | 73.52 µs | 143.11 µs | 0 | 0 bytes | 0 bytes | 1 | 5 bytes | 5 bytes | 5 bytes |
| sql/casetest | 1 | 121.19 µs | 121.19 µs | 121.19 µs | 121.19 µs | 0 | 0 bytes | 0 bytes | 0 | 0 bytes | 0 bytes | 0 bytes |
| sql/binlog_index | 5 | 593.47 µs | 1.07 µs | 118.69 µs | 535.90 µs | 0 | 0 bytes | 0 bytes | 0 | 0 bytes | 0 bytes | 0 bytes |
| sql/misc | 23 | 2.73 ms | 65.14 µs | 118.50 µs | 255.31 µs | 0 | 0 bytes | 0 bytes | 0 | 0 bytes | 0 bytes | 0 bytes |
+--------------------+--------+---------------+-------------+-------------+-------------+------------+------------+-----------+-------------+---------------+-------------+-----------------+Shows the top global IO consumers by latency.
mysql> SELECT * FROM io_global_by_wait_by_latency;
+-------------------------+-------+---------------+-------------+-------------+--------------+---------------+--------------+------------+------------+-----------+-------------+---------------+-------------+
| event_name | total | total_latency | avg_latency | max_latency | read_latency | write_latency | misc_latency | count_read | total_read | avg_read | count_write | total_written | avg_written |
+-------------------------+-------+---------------+-------------+-------------+--------------+---------------+--------------+------------+------------+-----------+-------------+---------------+-------------+
| sql/file_parser | 5433 | 30.20 s | 5.56 ms | 203.65 ms | 22.08 ms | 24.89 ms | 30.16 s | 24 | 6.18 KiB | 264 bytes | 737 | 2.15 MiB | 2.99 KiB |
| innodb/innodb_data_file | 1344 | 1.52 s | 1.13 ms | 350.70 ms | 203.82 ms | 450.96 ms | 868.21 ms | 147 | 2.30 MiB | 16.00 KiB | 1001 | 53.61 MiB | 54.84 KiB |
| innodb/innodb_log_file | 828 | 893.48 ms | 1.08 ms | 30.11 ms | 16.32 ms | 705.89 ms | 171.27 ms | 6 | 68.00 KiB | 11.33 KiB | 413 | 2.19 MiB | 5.42 KiB |
| myisam/kfile | 7642 | 242.34 ms | 31.71 us | 19.27 ms | 73.60 ms | 23.48 ms | 145.26 ms | 758 | 135.63 KiB | 183 bytes | 4386 | 232.52 KiB | 54 bytes |
| myisam/dfile | 12540 | 223.47 ms | 17.82 us | 32.50 ms | 87.76 ms | 16.97 ms | 118.74 ms | 5390 | 4.49 MiB | 873 bytes | 1448 | 2.65 MiB | 1.88 KiB |
| csv/metadata | 8 | 28.98 ms | 3.62 ms | 20.15 ms | 399.27 us | 0 ps | 28.58 ms | 2 | 70 bytes | 35 bytes | 0 | 0 bytes | 0 bytes |
| mysys/charset | 3 | 24.24 ms | 8.08 ms | 24.15 ms | 24.15 ms | 0 ps | 93.18 us | 1 | 17.31 KiB | 17.31 KiB | 0 | 0 bytes | 0 bytes |
| sql/ERRMSG | 5 | 20.43 ms | 4.09 ms | 19.31 ms | 20.32 ms | 0 ps | 103.20 us | 3 | 58.97 KiB | 19.66 KiB | 0 | 0 bytes | 0 bytes |
| mysys/cnf | 5 | 11.37 ms | 2.27 ms | 11.28 ms | 11.29 ms | 0 ps | 78.22 us | 3 | 56 bytes | 19 bytes | 0 | 0 bytes | 0 bytes |
| sql/dbopt | 57 | 4.04 ms | 70.92 us | 843.70 us | 0 ps | 186.43 us | 3.86 ms | 0 | 0 bytes | 0 bytes | 7 | 431 bytes | 62 bytes |
| csv/data | 4 | 411.55 us | 102.89 us | 234.89 us | 0 ps | 0 ps | 411.55 us | 0 | 0 bytes | 0 bytes | 0 | 0 bytes | 0 bytes |
| sql/misc | 22 | 340.38 us | 15.47 us | 33.77 us | 0 ps | 0 ps | 340.38 us | 0 | 0 bytes | 0 bytes | 0 | 0 bytes | 0 bytes |
| archive/data | 39 | 277.86 us | 7.12 us | 16.18 us | 0 ps | 0 ps | 277.86 us | 0 | 0 bytes | 0 bytes | 0 | 0 bytes | 0 bytes |
| sql/pid | 3 | 218.03 us | 72.68 us | 154.84 us | 0 ps | 21.64 us | 196.39 us | 0 | 0 bytes | 0 bytes | 1 | 6 bytes | 6 bytes |
| sql/casetest | 5 | 197.15 us | 39.43 us | 126.31 us | 0 ps | 0 ps | 197.15 us | 0 | 0 bytes | 0 bytes | 0 | 0 bytes | 0 bytes |
| sql/global_ddl_log | 2 | 14.60 us | 7.30 us | 12.12 us | 0 ps | 0 ps | 14.60 us | 0 | 0 bytes | 0 bytes | 0 | 0 bytes | 0 bytes |
+-------------------------+-------+---------------+-------------+-------------+--------------+---------------+--------------+------------+------------+-----------+-------------+---------------+-------------+Shows the latest file IO, by file / thread.
mysql> select * from latest_file_io limit 5;
+----------------------+----------------------------------------+------------+-----------+-----------+
| thread | file | latency | operation | requested |
+----------------------+----------------------------------------+------------+-----------+-----------+
| msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYI | 9.26 µs | write | 124 bytes |
| msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYI | 4.00 µs | write | 2 bytes |
| msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYI | 56.34 µs | close | NULL |
| msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYD | 53.93 µs | close | NULL |
| msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYI | 104.05 ms | delete | NULL |
+----------------------+----------------------------------------+------------+-----------+-----------+Summarizes memory use by user using the 5.7 Performance Schema instrumentation.
mysql> select * from memory_by_user_by_current_bytes WHERE user IS NOT NULL;
+------+--------------------+-------------------+-------------------+-------------------+-----------------+
| user | current_count_used | current_allocated | current_avg_alloc | current_max_alloc | total_allocated |
+------+--------------------+-------------------+-------------------+-------------------+-----------------+
| root | 1401 | 1.09 MiB | 815 bytes | 334.97 KiB | 42.73 MiB |
| mark | 201 | 496.08 KiB | 2.47 KiB | 334.97 KiB | 5.50 MiB |
+------+--------------------+-------------------+-------------------+-------------------+-----------------+Summarizes memory use by host using the 5.7 Performance Schema instrumentation.
mysql> select * from memory_by_host_by_current_bytes WHERE host IS NOT NULL;
+------+--------------------+-------------------+-------------------+-------------------+-----------------+
| host | current_count_used | current_allocated | current_avg_alloc | current_max_alloc | total_allocated |
+------+--------------------+-------------------+-------------------+-------------------+-----------------+
| hal1 | 1401 | 1.09 MiB | 815 bytes | 334.97 KiB | 42.73 MiB |
| hal2 | 201 | 496.08 KiB | 2.47 KiB | 334.97 KiB | 5.50 MiB |
+------+--------------------+-------------------+-------------------+-------------------+-----------------+Shows the current memory usage within the server globally broken down by allocation type.
mysql> select * from memory_global_by_current_allocated;
+----------------------------------------+---------------+---------------+-------------------+------------+------------+----------------+
| event_name | current_count | current_alloc | current_avg_alloc | high_count | high_alloc | high_avg_alloc |
+----------------------------------------+---------------+---------------+-------------------+------------+------------+----------------+
| memory/sql/TABLE_SHARE::mem_root | 269 | 568.21 KiB | 2.11 KiB | 339 | 706.04 KiB | 2.08 KiB |
| memory/sql/TABLE | 214 | 366.56 KiB | 1.71 KiB | 245 | 481.13 KiB | 1.96 KiB |
| memory/sql/sp_head::main_mem_root | 32 | 334.97 KiB | 10.47 KiB | 421 | 9.73 MiB | 23.66 KiB |
| memory/sql/Filesort_buffer::sort_keys | 1 | 255.89 KiB | 255.89 KiB | 1 | 256.00 KiB | 256.00 KiB |
| memory/mysys/array_buffer | 82 | 121.66 KiB | 1.48 KiB | 1124 | 852.55 KiB | 777 bytes |
...
+----------------------------------------+---------------+---------------+-------------------+------------+------------+----------------+Shows the total memory usage within the server globally.
mysql> select * from memory_global_total;
+-----------------+
| total_allocated |
+-----------------+
| 458.44 MiB |
+-----------------+A detailed non-blocking processlist view to replace [INFORMATION_SCHEMA. | SHOW FULL] PROCESSLIST.
Performs less locking than the legacy sources, whilst giving extra information.
mysql> select * from processlist where conn_id is not null\G
*************************** 1. row ***************************
thd_id: 31
conn_id: 12
user: root@localhost
db: information_schema
command: Query
state: Sending data
time: 0
current_statement: select * from processlist limit 5
lock_latency: 684.00 us
rows_examined: 0
rows_sent: 0
rows_affected: 0
tmp_tables: 2
tmp_disk_tables: 0
full_scan: YES
current_memory: 1.29 MiB
last_statement: NULL
last_statement_latency: NULL
last_wait: wait/synch/mutex/sql/THD::LOCK_query_plan
last_wait_latency: 260.13 ns
source: sql_optimizer.cc:1075Used to check whether Performance Schema is not able to monitor all runtime data - only returns variables that have lost instruments
mysql> select * from ps_check_lost_instrumentation;
+----------------------------------------+----------------+
| variable_name | variable_value |
+----------------------------------------+----------------+
| Performance_schema_file_handles_lost | 101223 |
| Performance_schema_file_instances_lost | 1231 |
+----------------------------------------+----------------+Statistics around indexes.
Ordered by the total wait time descending - top indexes are most contended.
mysql> select * from schema_index_statistics limit 5;
+------------------+-------------+------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+
| table_schema | table_name | index_name | rows_selected | select_latency | rows_inserted | insert_latency | rows_updated | update_latency | rows_deleted | delete_latency |
+------------------+-------------+------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+
| mem | mysqlserver | PRIMARY | 6208 | 108.27 ms | 0 | 0 ps | 5470 | 1.47 s | 0 | 0 ps |
| mem | innodb | PRIMARY | 4666 | 76.27 ms | 0 | 0 ps | 4454 | 571.47 ms | 0 | 0 ps |
| mem | connection | PRIMARY | 1064 | 20.98 ms | 0 | 0 ps | 1064 | 457.30 ms | 0 | 0 ps |
| mem | environment | PRIMARY | 5566 | 151.17 ms | 0 | 0 ps | 694 | 252.57 ms | 0 | 0 ps |
| mem | querycache | PRIMARY | 1698 | 27.99 ms | 0 | 0 ps | 1698 | 371.72 ms | 0 | 0 ps |
+------------------+-------------+------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+Shows an overview of the types of objects within each schema
Note: On instances with a large numbers of objects, this could take some time to execute, and may not be recommended.
mysql> select * from schema_object_overview;
+---------------------------------+---------------+-------+
| db | object_type | count |
+---------------------------------+---------------+-------+
| admin | PROCEDURE | 1 |
| information_schema | SYSTEM VIEW | 59 |
| mem30_test__instruments | BASE TABLE | 1 |
| mem30_test__instruments | INDEX (BTREE) | 2 |
| mem30_trunk__advisors | BASE TABLE | 2 |
| mem30_trunk__advisors | INDEX (BTREE) | 4 |
| mem30_trunk__advisor_text | BASE TABLE | 2 |
| mem30_trunk__advisor_text | INDEX (BTREE) | 5 |
| mem30_trunk__bean_config | BASE TABLE | 4 |
| mem30_trunk__bean_config | INDEX (BTREE) | 6 |
| mem30_trunk__config | BASE TABLE | 12 |
| mem30_trunk__config | INDEX (BTREE) | 21 |
| mem30_trunk__enterprise | BASE TABLE | 2 |
| mem30_trunk__enterprise | INDEX (BTREE) | 3 |
| mem30_trunk__events | BASE TABLE | 32 |
| mem30_trunk__events | INDEX (BTREE) | 69 |
| mem30_trunk__instruments | BASE TABLE | 118 |
| mem30_trunk__instruments | INDEX (BTREE) | 587 |
| mem30_trunk__instruments_config | BASE TABLE | 1 |
| mem30_trunk__instruments_config | INDEX (BTREE) | 1 |
| mem30_trunk__inventory | BASE TABLE | 77 |
| mem30_trunk__inventory | INDEX (BTREE) | 277 |
| mem30_trunk__quan | BASE TABLE | 8 |
| mem30_trunk__quan | INDEX (BTREE) | 35 |
| mysql | BASE TABLE | 29 |
| mysql | INDEX (BTREE) | 54 |
| performance_schema | BASE TABLE | 52 |
| sys | FUNCTION | 8 |
| sys | PROCEDURE | 16 |
| sys | VIEW | 59 |
+---------------------------------+---------------+-------+Statistics around tables.
Ordered by the total wait time descending - top tables are most contended.
mysql> select * from schema_table_statistics limit 1\G
*************************** 1. row ***************************
table_schema: mem
table_name: mysqlserver
rows_fetched: 27087
fetch_latency: 442.72 ms
rows_inserted: 2
insert_latency: 185.04 µs
rows_updated: 5096
update_latency: 1.39 s
rows_deleted: 0
delete_latency: 0 ps
io_read_requests: 2565
io_read_bytes: 1121627
io_read_latency: 10.07 ms
io_write_requests: 1691
io_write_bytes: 128383
io_write_latency: 14.17 ms
io_misc_requests: 2698
io_misc_latency: 433.66 msStatistics around tables.
Ordered by the total wait time descending - top tables are most contended.
More statistics such as caching stats for the InnoDB buffer pool with InnoDB tables
mysql> select * from schema_table_statistics_with_buffer limit 1\G
*************************** 1. row ***************************
table_schema: mem
table_name: mysqlserver
rows_fetched: 27087
fetch_latency: 442.72 ms
rows_inserted: 2
insert_latency: 185.04 µs
rows_updated: 5096
update_latency: 1.39 s
rows_deleted: 0
delete_latency: 0 ps
io_read_requests: 2565
io_read_bytes: 1121627
io_read_latency: 10.07 ms
io_write_requests: 1691
io_write_bytes: 128383
io_write_latency: 14.17 ms
io_misc_requests: 2698
io_misc_latency: 433.66 ms
innodb_buffer_pages: 19
innodb_buffer_pages_hashed: 19
innodb_buffer_pages_old: 19
innodb_buffer_bytes_allocated: 311296
innodb_buffer_bytes_data: 1924
innodb_buffer_rows_cached: 2Finds tables that are being accessed by full table scans ordering by the number of rows scanned descending.
mysql> select * from schema_tables_with_full_table_scans limit 5;
+------------------+-------------------+-------------------+
| object_schema | object_name | rows_full_scanned |
+------------------+-------------------+-------------------+
| mem | rule_alarms | 1210 |
| mem30__advisors | advisor_schedules | 1021 |
| mem30__inventory | agent | 498 |
| mem | dc_p_string | 449 |
| mem30__inventory | mysqlserver | 294 |
+------------------+-------------------+-------------------+Finds indexes that have had no events against them (and hence, no usage).
To trust whether the data from this view is representative of your workload, you should ensure that the server has been up for a representative amount of time before using it.
mysql> select * from schema_unused_indexes limit 10;
+-------------------------+----------------------------------------+-----------------+
| object_schema | object_name | index_name |
+-------------------------+----------------------------------------+-----------------+
| mem30_test__instruments | mysqlavailabilityadvisor$observedstate | PRIMARY |
| mem30_test__test | compressme | PRIMARY |
| mem30_test__test | compressmekeyblocksize | PRIMARY |
| mem30_test__test | dontcompressme | PRIMARY |
| mem30_test__test | round_robin_test | PRIMARY |
| mem30_test__test | round_robin_test | round_robin_bin |
| mem30_test__test | testprovider$dummy1 | PRIMARY |
| mem30_test__test | testprovider$dummy1 | ts |
| mem30_test__test | testprovider$dummy2 | PRIMARY |
| mem30_test__test | testprovider$dummy2 | ts |
+-------------------------+----------------------------------------+-----------------+Lists a normalized statement view with aggregated statistics, mimics the MySQL Enterprise Monitor Query Analysis view, ordered by the total execution time per normalized statement
mysql> select * from statement_analysis limit 1\G
*************************** 1. row ***************************
query: SELECT * FROM `schema_object_o ... MA` , `information_schema` ...
db: sys
full_scan: *
exec_count: 2
err_count: 0
warn_count: 0
total_latency: 16.75 s
max_latency: 16.57 s
avg_latency: 8.38 s
lock_latency: 16.69 s
rows_sent: 84
rows_sent_avg: 42
rows_examined: 20012
rows_examined_avg: 10006
tmp_tables: 378
tmp_disk_tables: 66
rows_sorted: 168
sort_merge_passes: 0
digest: 54f9bd520f0bbf15db0c2ed93386bec9
first_seen: 2014-03-07 13:13:41
last_seen: 2014-03-07 13:13:48Lists all normalized statements that have raised errors or warnings.
mysql> select * from statements_with_errors_or_warnings LIMIT 1\G
*************************** 1. row ***************************
query: CREATE OR REPLACE ALGORITHM = ... _delete` AS `rows_deleted` ...
db: sys
exec_count: 2
errors: 1
error_pct: 50.0000
warnings: 0
warning_pct: 0.0000
first_seen: 2014-03-07 12:56:54
last_seen: 2014-03-07 13:01:01
digest: 943a788859e623d5f7798ba0ae0fd8a9Lists all normalized statements that use have done a full table scan ordered by number the percentage of times a full scan was done, then by the statement latency.
mysql> select * from statements_with_full_table_scans limit 1\G
*************************** 1. row ***************************
query: SELECT * FROM `schema_tables_w ... ex_usage` . `COUNT_READ` DESC
db: sys
exec_count: 1
total_latency: 88.20 ms
no_index_used_count: 1
no_good_index_used_count: 0
no_index_used_pct: 100
rows_sent: 0
rows_examined: 1501
rows_sent_avg: 0
rows_examined_avg: 1501
first_seen: 2014-03-07 13:58:20
last_seen: 2014-03-07 13:58:20
digest: 64baecd5c1e1e1651a6b92e55442a288Lists all statements who's average runtime, in microseconds, is in the top 95th percentile.
Also includes two helper views:
- x$ps_digest_avg_latency_distribution
- x$ps_digest_95th_percentile_by_avg_us
mysql> select * from statements_with_runtimes_in_95th_percentile\G
*************************** 1. row ***************************
query: SELECT * FROM `schema_object_o ... MA` , `information_schema` ...
db: sys
full_scan: *
exec_count: 2
err_count: 0
warn_count: 0
total_latency: 16.75 s
max_latency: 16.57 s
avg_latency: 8.38 s
rows_sent: 84
rows_sent_avg: 42
rows_examined: 20012
rows_examined_avg: 10006
first_seen: 2014-03-07 13:13:41
last_seen: 2014-03-07 13:13:48
digest: 54f9bd520f0bbf15db0c2ed93386bec9Lists all normalized statements that have done sorts, ordered by total_latency descending.
mysql> select * from statements_with_sorting limit 1\G
*************************** 1. row ***************************
query: SELECT * FROM `schema_object_o ... MA` , `information_schema` ...
db: sys
exec_count: 2
total_latency: 16.75 s
sort_merge_passes: 0
avg_sort_merges: 0
sorts_using_scans: 12
sort_using_range: 0
rows_sorted: 168
avg_rows_sorted: 84
first_seen: 2014-03-07 13:13:41
last_seen: 2014-03-07 13:13:48
digest: 54f9bd520f0bbf15db0c2ed93386bec9Lists all normalized statements that use temporary tables ordered by number of on disk temporary tables descending first, then by the number of memory tables.
mysql> select * from statements_with_temp_tables limit 1\G
*************************** 1. row ***************************
query: SELECT * FROM `schema_object_o ... MA` , `information_schema` ...
db: sys
exec_count: 2
total_latency: 16.75 s
memory_tmp_tables: 378
disk_tmp_tables: 66
avg_tmp_tables_per_query: 189
tmp_tables_to_disk_pct: 17
first_seen: 2014-03-07 13:13:41
last_seen: 2014-03-07 13:13:48
digest: 54f9bd520f0bbf15db0c2ed93386bec9Summarizes statement activity, file IO and connections by user.
mysql> select * from user_summary;
+------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+
| user | statements | statement_latency | statement_avg_latency | table_scans | file_ios | file_io_latency | current_connections | total_connections | unique_hosts |
+------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+
| root | 2924 | 00:03:59.53 | 81.92 ms | 82 | 54702 | 55.61 s | 1 | 1 | 1 |
+------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+Summarizes file IO totals per user.
When the user found is NULL, it is assumed to be a "background" thread.
mysql> select * from user_summary_by_file_io;
+------------+-------+------------+
| user | ios | io_latency |
+------------+-------+------------+
| root | 26457 | 21.58 s |
| background | 1189 | 394.21 ms |
+------------+-------+------------+Summarizes file IO by event type per user.
When the user found is NULL, it is assumed to be a "background" thread.
mysql> select * from user_summary_by_file_io_type;
+------------+--------------------------------------+-------+-----------+-------------+
| user | event_name | total | latency | max_latency |
+------------+--------------------------------------+-------+-----------+-------------+
| background | wait/io/file/innodb/innodb_data_file | 1434 | 3.29 s | 147.56 ms |
| background | wait/io/file/sql/FRM | 910 | 286.61 ms | 32.92 ms |
| background | wait/io/file/sql/relaylog | 9 | 252.28 ms | 144.17 ms |
| background | wait/io/file/sql/binlog | 56 | 193.73 ms | 153.72 ms |
| background | wait/io/file/sql/binlog_index | 22 | 183.02 ms | 81.83 ms |
| background | wait/io/file/innodb/innodb_log_file | 20 | 117.17 ms | 36.53 ms |
| background | wait/io/file/sql/relaylog_index | 9 | 50.15 ms | 48.04 ms |
| background | wait/io/file/sql/ERRMSG | 5 | 35.41 ms | 31.78 ms |
| background | wait/io/file/myisam/kfile | 67 | 18.14 ms | 9.00 ms |
| background | wait/io/file/mysys/charset | 3 | 7.46 ms | 4.13 ms |
| background | wait/io/file/sql/casetest | 5 | 6.01 ms | 5.86 ms |
| background | wait/io/file/sql/pid | 3 | 5.96 ms | 3.06 ms |
| background | wait/io/file/myisam/dfile | 43 | 980.38 us | 152.46 us |
| background | wait/io/file/mysys/cnf | 5 | 154.97 us | 58.87 us |
| background | wait/io/file/sql/global_ddl_log | 2 | 18.64 us | 16.40 us |
| root | wait/io/file/sql/file_parser | 11048 | 48.79 s | 201.11 ms |
| root | wait/io/file/innodb/innodb_data_file | 4699 | 3.02 s | 46.93 ms |
| root | wait/io/file/sql/FRM | 10403 | 2.38 s | 61.72 ms |
| root | wait/io/file/myisam/dfile | 22143 | 726.77 ms | 308.79 ms |
| root | wait/io/file/myisam/kfile | 6213 | 435.35 ms | 88.76 ms |
| root | wait/io/file/sql/dbopt | 159 | 130.86 ms | 15.46 ms |
| root | wait/io/file/csv/metadata | 8 | 86.60 ms | 50.32 ms |
| root | wait/io/file/sql/binlog | 15 | 38.79 ms | 9.40 ms |
| root | wait/io/file/sql/misc | 21 | 22.33 ms | 15.30 ms |
| root | wait/io/file/csv/data | 4 | 297.46 us | 111.93 us |
| root | wait/io/file/archive/data | 3 | 54.10 us | 40.74 us |
+------------+--------------------------------------+-------+-----------+-------------+Summarizes stages by user, ordered by user and total latency per stage.
mysql> select * from user_summary_by_stages;
+------+--------------------------------+-------+-----------+-----------+
| user | event_name | total | wait_sum | wait_avg |
+------+--------------------------------+-------+-----------+-----------+
| root | stage/sql/Opening tables | 889 | 1.97 ms | 2.22 us |
| root | stage/sql/Creating sort index | 4 | 1.79 ms | 446.30 us |
| root | stage/sql/init | 10 | 312.27 us | 31.23 us |
| root | stage/sql/checking permissions | 10 | 300.62 us | 30.06 us |
| root | stage/sql/freeing items | 5 | 85.89 us | 17.18 us |
| root | stage/sql/statistics | 5 | 79.15 us | 15.83 us |
| root | stage/sql/preparing | 5 | 69.12 us | 13.82 us |
| root | stage/sql/optimizing | 5 | 53.11 us | 10.62 us |
| root | stage/sql/Sending data | 5 | 44.66 us | 8.93 us |
| root | stage/sql/closing tables | 5 | 37.54 us | 7.51 us |
| root | stage/sql/System lock | 5 | 34.28 us | 6.86 us |
| root | stage/sql/query end | 5 | 24.37 us | 4.87 us |
| root | stage/sql/end | 5 | 8.60 us | 1.72 us |
| root | stage/sql/Sorting result | 5 | 8.33 us | 1.67 us |
| root | stage/sql/executing | 5 | 5.37 us | 1.07 us |
| root | stage/sql/cleaning up | 5 | 4.60 us | 919.00 ns |
+------+--------------------------------+-------+-----------+-----------+Summarizes overall statement statistics by user.
mysql> select * from user_summary_by_statement_latency;
+------+-------+---------------+-------------+--------------+-----------+---------------+---------------+------------+
| user | total | total_latency | max_latency | lock_latency | rows_sent | rows_examined | rows_affected | full_scans |
+------+-------+---------------+-------------+--------------+-----------+---------------+---------------+------------+
| root | 3381 | 00:02:09.13 | 1.48 s | 1.07 s | 1151 | 93947 | 150 | 91 |
+------+-------+---------------+-------------+--------------+-----------+---------------+---------------+------------+Summarizes the types of statements executed by each user.
mysql> select * from user_summary_by_statement_type;
+------+------------------+-------+---------------+-------------+--------------+-----------+---------------+---------------+------------+
| user | statement | total | total_latency | max_latency | lock_latency | rows_sent | rows_examined | rows_affected | full_scans |
+------+------------------+-------+---------------+-------------+--------------+-----------+---------------+---------------+------------+
| root | create_view | 1332 | 00:03:39.08 | 677.76 ms | 494.56 ms | 0 | 0 | 0 | 0 |
| root | select | 88 | 20.13 s | 16.57 s | 17.40 s | 1804 | 77285 | 0 | 48 |
| root | drop_db | 16 | 6.83 s | 1.14 s | 5.73 s | 0 | 0 | 953 | 0 |
| root | drop_view | 392 | 1.70 s | 739.49 ms | 0 ps | 0 | 0 | 0 | 0 |
| root | show_databases | 16 | 1.37 s | 587.44 ms | 1.31 ms | 400 | 400 | 0 | 16 |
| root | show_tables | 34 | 676.78 ms | 167.04 ms | 3.46 ms | 1087 | 1087 | 0 | 34 |
| root | create_db | 22 | 334.90 ms | 38.93 ms | 0 ps | 0 | 0 | 22 | 0 |
| root | create_procedure | 352 | 250.02 ms | 21.90 ms | 165.17 ms | 0 | 0 | 0 | 0 |
| root | drop_function | 176 | 122.44 ms | 69.18 ms | 87.24 ms | 0 | 0 | 0 | 0 |
| root | create_function | 176 | 76.12 ms | 1.36 ms | 49.50 ms | 0 | 0 | 0 | 0 |
| root | drop_procedure | 352 | 67.41 ms | 1.57 ms | 36.22 ms | 0 | 0 | 0 | 0 |
| root | update | 2 | 41.75 ms | 35.96 ms | 35.52 ms | 0 | 557 | 338 | 0 |
| root | error | 3 | 17.22 ms | 17.05 ms | 0 ps | 0 | 0 | 0 | 0 |
| root | set_option | 88 | 8.02 ms | 1.63 ms | 0 ps | 0 | 0 | 0 | 0 |
| root | call_procedure | 2 | 2.98 ms | 2.29 ms | 95.00 us | 0 | 0 | 0 | 0 |
| root | Init DB | 22 | 1.07 ms | 117.65 us | 0 ps | 0 | 0 | 0 | 0 |
| root | show_status | 1 | 408.69 us | 408.69 us | 102.00 us | 23 | 23 | 0 | 1 |
+------+------------------+-------+---------------+-------------+--------------+-----------+---------------+---------------+------------+Summarizes statement activity, file IO and connections by host.
mysql> select * from host_summary;
+------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+
| host | statements | statement_latency | statement_avg_latency | table_scans | file_ios | file_io_latency | current_connections | total_connections | unique_users |
+------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+
| hal1 | 2924 | 00:03:59.53 | 81.92 ms | 82 | 54702 | 55.61 s | 1 | 1 | 1 |
+------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+
Summarizes file IO totals per host.
mysql> select * from host_summary_by_file_io;
+------------+-------+------------+
| host | ios | io_latency |
+------------+-------+------------+
| hal1 | 26457 | 21.58 s |
| hal2 | 1189 | 394.21 ms |
+------------+-------+------------+Summarizes file IO by event type per host.
mysql> select * from host_summary_by_file_io_type;
+------------+--------------------------------------+-------+-----------+-------------+
| host | event_name | total | latency | max_latency |
+------------+--------------------------------------+-------+-----------+-------------+
| hal1 | wait/io/file/sql/FRM | 871 | 168.15 ms | 18.48 ms |
| hal1 | wait/io/file/innodb/innodb_data_file | 173 | 129.56 ms | 34.09 ms |
| hal1 | wait/io/file/innodb/innodb_log_file | 20 | 77.53 ms | 60.66 ms |
| hal1 | wait/io/file/myisam/dfile | 40 | 6.54 ms | 4.58 ms |
| hal1 | wait/io/file/mysys/charset | 3 | 4.79 ms | 4.71 ms |
| hal1 | wait/io/file/myisam/kfile | 67 | 4.38 ms | 300.04 us |
| hal1 | wait/io/file/sql/ERRMSG | 5 | 2.72 ms | 1.69 ms |
| hal1 | wait/io/file/sql/pid | 3 | 266.30 us | 185.47 us |
| hal1 | wait/io/file/sql/casetest | 5 | 246.81 us | 150.19 us |
| hal1 | wait/io/file/sql/global_ddl_log | 2 | 21.24 us | 18.59 us |
| hal2 | wait/io/file/sql/file_parser | 1422 | 4.80 s | 135.14 ms |
| hal2 | wait/io/file/sql/FRM | 865 | 85.82 ms | 9.81 ms |
| hal2 | wait/io/file/myisam/kfile | 1073 | 37.14 ms | 15.79 ms |
| hal2 | wait/io/file/myisam/dfile | 2991 | 25.53 ms | 5.25 ms |
| hal2 | wait/io/file/sql/dbopt | 20 | 1.07 ms | 153.07 us |
| hal2 | wait/io/file/sql/misc | 4 | 59.71 us | 33.75 us |
| hal2 | wait/io/file/archive/data | 1 | 13.91 us | 13.91 us |
+------------+--------------------------------------+-------+-----------+-------------+Summarizes stages by host, ordered by host and total latency per stage.
mysql> select * from host_summary_by_stages;
+------+--------------------------------+-------+-----------+-----------+
| host | event_name | total | wait_sum | wait_avg |
+------+--------------------------------+-------+-----------+-----------+
| hal | stage/sql/Opening tables | 889 | 1.97 ms | 2.22 us |
| hal | stage/sql/Creating sort index | 4 | 1.79 ms | 446.30 us |
| hal | stage/sql/init | 10 | 312.27 us | 31.23 us |
| hal | stage/sql/checking permissions | 10 | 300.62 us | 30.06 us |
| hal | stage/sql/freeing items | 5 | 85.89 us | 17.18 us |
| hal | stage/sql/statistics | 5 | 79.15 us | 15.83 us |
| hal | stage/sql/preparing | 5 | 69.12 us | 13.82 us |
| hal | stage/sql/optimizing | 5 | 53.11 us | 10.62 us |
| hal | stage/sql/Sending data | 5 | 44.66 us | 8.93 us |
| hal | stage/sql/closing tables | 5 | 37.54 us | 7.51 us |
| hal | stage/sql/System lock | 5 | 34.28 us | 6.86 us |
| hal | stage/sql/query end | 5 | 24.37 us | 4.87 us |
| hal | stage/sql/end | 5 | 8.60 us | 1.72 us |
| hal | stage/sql/Sorting result | 5 | 8.33 us | 1.67 us |
| hal | stage/sql/executing | 5 | 5.37 us | 1.07 us |
| hal | stage/sql/cleaning up | 5 | 4.60 us | 919.00 ns |
+------+--------------------------------+-------+-----------+-----------+Summarizes overall statement statistics by host.
mysql> select * from host_summary_by_statement_latency;
+------+-------+---------------+-------------+--------------+-----------+---------------+---------------+------------+
| host | total | total_latency | max_latency | lock_latency | rows_sent | rows_examined | rows_affected | full_scans |
+------+-------+---------------+-------------+--------------+-----------+---------------+---------------+------------+
| hal | 3381 | 00:02:09.13 | 1.48 s | 1.07 s | 1151 | 93947 | 150 | 91 |
+------+-------+---------------+-------------+--------------+-----------+---------------+---------------+------------+Summarizes the types of statements executed by each host.
mysql> select * from host_summary_by_statement_type;
+------+----------------------+--------+---------------+-------------+--------------+-----------+---------------+---------------+------------+
| host | statement | total | total_latency | max_latency | lock_latency | rows_sent | rows_examined | rows_affected | full_scans |
+------+----------------------+--------+---------------+-------------+--------------+-----------+---------------+---------------+------------+
| hal | create_view | 2063 | 00:05:04.20 | 463.58 ms | 1.42 s | 0 | 0 | 0 | 0 |
| hal | select | 174 | 40.87 s | 28.83 s | 858.13 ms | 5212 | 157022 | 0 | 82 |
| hal | stmt | 6645 | 15.31 s | 491.78 ms | 0 ps | 0 | 0 | 7951 | 0 |
| hal | call_procedure | 17 | 4.78 s | 1.02 s | 37.94 ms | 0 | 0 | 19 | 0 |
| hal | create_table | 19 | 3.04 s | 431.71 ms | 0 ps | 0 | 0 | 0 | 0 |
...
+------+----------------------+--------+---------------+-------------+--------------+-----------+---------------+---------------+------------+
Lists the top wait classes by average latency, ignoring idle (this may be very large).
mysql> select * from wait_classes_global_by_avg_latency where event_class != 'idle';
+-------------------+--------+---------------+-------------+-------------+-------------+
| event_class | total | total_latency | min_latency | avg_latency | max_latency |
+-------------------+--------+---------------+-------------+-------------+-------------+
| wait/io/file | 543123 | 44.60 s | 19.44 ns | 82.11 µs | 4.21 s |
| wait/io/table | 22002 | 766.60 ms | 148.72 ns | 34.84 µs | 44.97 ms |
| wait/io/socket | 79613 | 967.17 ms | 0 ps | 12.15 µs | 27.10 ms |
| wait/lock/table | 35409 | 18.68 ms | 65.45 ns | 527.51 ns | 969.88 µs |
| wait/synch/rwlock | 37935 | 4.61 ms | 21.38 ns | 121.61 ns | 34.65 µs |
| wait/synch/mutex | 390622 | 18.60 ms | 19.44 ns | 47.61 ns | 10.32 µs |
+-------------------+--------+---------------+-------------+-------------+-------------+Lists the top wait classes by total latency, ignoring idle (this may be very large).
mysql> select * from wait_classes_global_by_latency;
+-------------------+--------+---------------+-------------+-------------+-------------+
| event_class | total | total_latency | min_latency | avg_latency | max_latency |
+-------------------+--------+---------------+-------------+-------------+-------------+
| wait/io/file | 550470 | 46.01 s | 19.44 ns | 83.58 µs | 4.21 s |
| wait/io/socket | 228833 | 2.71 s | 0 ps | 11.86 µs | 29.93 ms |
| wait/io/table | 64063 | 1.89 s | 99.79 ns | 29.43 µs | 68.07 ms |
| wait/lock/table | 76029 | 47.19 ms | 65.45 ns | 620.74 ns | 969.88 µs |
| wait/synch/mutex | 635925 | 34.93 ms | 19.44 ns | 54.93 ns | 107.70 µs |
| wait/synch/rwlock | 61287 | 7.62 ms | 21.38 ns | 124.37 ns | 34.65 µs |
+-------------------+--------+---------------+-------------+-------------+-------------+Lists the top wait events by their total latency, ignoring idle (this may be very large) per user.
mysql> select * from waits_by_user_by_latency;
+------+-----------------------------------------------------+--------+---------------+-------------+-------------+
| user | event | total | total_latency | avg_latency | max_latency |
+------+-----------------------------------------------------+--------+---------------+-------------+-------------+
| root | wait/io/file/sql/file_parser | 13743 | 00:01:00.46 | 4.40 ms | 231.88 ms |
| root | wait/io/file/innodb/innodb_data_file | 4699 | 3.02 s | 643.38 us | 46.93 ms |
| root | wait/io/file/sql/FRM | 11462 | 2.60 s | 226.83 us | 61.72 ms |
| root | wait/io/file/myisam/dfile | 26776 | 746.70 ms | 27.89 us | 308.79 ms |
| root | wait/io/file/myisam/kfile | 7126 | 462.66 ms | 64.93 us | 88.76 ms |
| root | wait/io/file/sql/dbopt | 179 | 137.58 ms | 768.59 us | 15.46 ms |
| root | wait/io/file/csv/metadata | 8 | 86.60 ms | 10.82 ms | 50.32 ms |
| root | wait/synch/mutex/mysys/IO_CACHE::append_buffer_lock | 798080 | 66.46 ms | 82.94 ns | 161.03 us |
| root | wait/io/file/sql/binlog | 19 | 49.11 ms | 2.58 ms | 9.40 ms |
| root | wait/io/file/sql/misc | 26 | 22.38 ms | 860.80 us | 15.30 ms |
| root | wait/io/file/csv/data | 4 | 297.46 us | 74.37 us | 111.93 us |
| root | wait/synch/rwlock/sql/MDL_lock::rwlock | 944 | 287.86 us | 304.62 ns | 874.64 ns |
| root | wait/io/file/archive/data | 4 | 82.71 us | 20.68 us | 40.74 us |
| root | wait/synch/mutex/myisam/MYISAM_SHARE::intern_lock | 60 | 12.21 us | 203.20 ns | 512.72 ns |
| root | wait/synch/mutex/innodb/trx_mutex | 81 | 5.93 us | 73.14 ns | 252.59 ns |
+------+-----------------------------------------------------+--------+---------------+-------------+-------------+Lists the top wait events by their total latency, ignoring idle (this may be very large) per host.
mysql> select * from waits_by_host_by_latency;
+------+-----------------------------------------------------+--------+---------------+-------------+-------------+
| host | event | total | total_latency | avg_latency | max_latency |
+------+-----------------------------------------------------+--------+---------------+-------------+-------------+
| hal1 | wait/io/file/sql/file_parser | 13743 | 00:01:00.46 | 4.40 ms | 231.88 ms |
| hal1 | wait/io/file/innodb/innodb_data_file | 4699 | 3.02 s | 643.38 us | 46.93 ms |
| hal1 | wait/io/file/sql/FRM | 11462 | 2.60 s | 226.83 us | 61.72 ms |
| hal1 | wait/io/file/myisam/dfile | 26776 | 746.70 ms | 27.89 us | 308.79 ms |
| hal1 | wait/io/file/myisam/kfile | 7126 | 462.66 ms | 64.93 us | 88.76 ms |
| hal1 | wait/io/file/sql/dbopt | 179 | 137.58 ms | 768.59 us | 15.46 ms |
| hal1 | wait/io/file/csv/metadata | 8 | 86.60 ms | 10.82 ms | 50.32 ms |
| hal1 | wait/synch/mutex/mysys/IO_CACHE::append_buffer_lock | 798080 | 66.46 ms | 82.94 ns | 161.03 us |
| hal1 | wait/io/file/sql/binlog | 19 | 49.11 ms | 2.58 ms | 9.40 ms |
| hal1 | wait/io/file/sql/misc | 26 | 22.38 ms | 860.80 us | 15.30 ms |
| hal1 | wait/io/file/csv/data | 4 | 297.46 us | 74.37 us | 111.93 us |
| hal1 | wait/synch/rwlock/sql/MDL_lock::rwlock | 944 | 287.86 us | 304.62 ns | 874.64 ns |
| hal1 | wait/io/file/archive/data | 4 | 82.71 us | 20.68 us | 40.74 us |
| hal1 | wait/synch/mutex/myisam/MYISAM_SHARE::intern_lock | 60 | 12.21 us | 203.20 ns | 512.72 ns |
| hal1 | wait/synch/mutex/innodb/trx_mutex | 81 | 5.93 us | 73.14 ns | 252.59 ns |
+------+-----------------------------------------------------+--------+---------------+-------------+-------------+Lists the top wait events by their total latency, ignoring idle (this may be very large).
mysql> select * from waits_global_by_latency;
+-----------------------------------------------------+---------+---------------+-------------+-------------+
| events | total | total_latency | avg_latency | max_latency |
+-----------------------------------------------------+---------+---------------+-------------+-------------+
| wait/io/file/sql/file_parser | 14936 | 00:01:06.64 | 4.46 ms | 231.88 ms |
| wait/io/file/innodb/innodb_data_file | 6133 | 6.31 s | 1.03 ms | 147.56 ms |
| wait/io/file/sql/FRM | 12677 | 2.83 s | 223.37 us | 40.86 ms |
| wait/io/file/myisam/dfile | 28446 | 754.40 ms | 26.52 us | 308.79 ms |
| wait/io/file/myisam/kfile | 7572 | 491.17 ms | 64.87 us | 88.76 ms |
| wait/io/file/sql/relaylog | 9 | 252.28 ms | 28.03 ms | 144.17 ms |
| wait/io/file/sql/binlog | 76 | 242.87 ms | 3.20 ms | 153.72 ms |
| wait/io/file/sql/binlog_index | 21 | 173.07 ms | 8.24 ms | 81.83 ms |
| wait/io/file/sql/dbopt | 184 | 149.52 ms | 812.62 us | 15.46 ms |
| wait/io/file/innodb/innodb_log_file | 20 | 117.17 ms | 5.86 ms | 36.53 ms |
| wait/synch/mutex/mysys/IO_CACHE::append_buffer_lock | 1197128 | 99.27 ms | 82.56 ns | 161.03 us |
| wait/io/file/csv/metadata | 8 | 86.60 ms | 10.82 ms | 50.32 ms |
| wait/io/file/sql/relaylog_index | 10 | 60.10 ms | 6.01 ms | 48.04 ms |
| wait/io/file/sql/ERRMSG | 5 | 35.41 ms | 7.08 ms | 31.78 ms |
| wait/io/file/sql/misc | 28 | 22.40 ms | 800.06 us | 15.30 ms |
| wait/io/file/mysys/charset | 3 | 7.46 ms | 2.49 ms | 4.13 ms |
| wait/io/file/sql/casetest | 5 | 6.01 ms | 1.20 ms | 5.86 ms |
| wait/io/file/sql/pid | 3 | 5.96 ms | 1.99 ms | 3.06 ms |
| wait/synch/rwlock/sql/MDL_lock::rwlock | 1396 | 420.58 us | 301.22 ns | 874.64 ns |
| wait/io/file/csv/data | 4 | 297.46 us | 74.37 us | 111.93 us |
| wait/io/file/mysys/cnf | 5 | 154.97 us | 30.99 us | 58.87 us |
| wait/io/file/archive/data | 4 | 82.71 us | 20.68 us | 40.74 us |
| wait/synch/mutex/myisam/MYISAM_SHARE::intern_lock | 90 | 19.23 us | 213.38 ns | 576.81 ns |
| wait/io/file/sql/global_ddl_log | 2 | 18.64 us | 9.32 us | 16.40 us |
| wait/synch/mutex/innodb/trx_mutex | 108 | 8.23 us | 76.15 ns | 365.69 ns |
+-----------------------------------------------------+---------+---------------+-------------+-------------+Takes a raw file path, and attempts to extract the schema name from it.
Useful for when interacting with Performance Schema data concerning IO statistics, for example.
Currently relies on the fact that a table data file will be within a specified database directory (will not work with partitions or tables that specify an individual DATA_DIRECTORY).
- path (VARCHAR(512)): The full file path to a data file to extract the schema name from.
VARCHAR(512)
mysql> SELECT sys.extract_schema_from_file_name('/var/lib/mysql/employees/employee.ibd');
+----------------------------------------------------------------------------+
| sys.extract_schema_from_file_name('/var/lib/mysql/employees/employee.ibd') |
+----------------------------------------------------------------------------+
| employees |
+----------------------------------------------------------------------------+
1 row in set (0.00 sec)Takes a raw file path, and extracts the table name from it.
Useful for when interacting with Performance Schema data concerning IO statistics, for example.
- path (VARCHAR(512)): The full file path to a data file to extract the table name from.
VARCHAR(512)
mysql> SELECT sys.extract_table_from_file_name('/var/lib/mysql/employees/employee.ibd');
+---------------------------------------------------------------------------+
| sys.extract_table_from_file_name('/var/lib/mysql/employees/employee.ibd') |
+---------------------------------------------------------------------------+
| employee |
+---------------------------------------------------------------------------+
1 row in set (0.02 sec)#### format_bytes
Takes a raw bytes value, and converts it to a human readable format.
- bytes (BIGINT): A raw bytes value.
VARCHAR(16)
mysql> SELECT sys.format_bytes(2348723492723746) AS size;
+----------+
| size |
+----------+
| 2.09 PiB |
+----------+
1 row in set (0.00 sec)
mysql> SELECT sys.format_bytes(2348723492723) AS size;
+----------+
| size |
+----------+
| 2.14 TiB |
+----------+
1 row in set (0.00 sec)
mysql> SELECT sys.format_bytes(23487234) AS size;
+-----------+
| size |
+-----------+
| 22.40 MiB |
+-----------+
1 row in set (0.00 sec)Takes a raw path value, and strips out the datadir or tmpdir replacing with @@datadir and @@tmpdir respectively.
Also normalizes the paths across operating systems, so backslashes on Windows are converted to forward slashes.
- path (VARCHAR(260)): The raw file path value to format.
VARCHAR(260) CHARSET UTF8
mysql> select @@datadir;
+-----------------------------------------------+
| @@datadir |
+-----------------------------------------------+
| /Users/mark/sandboxes/SmallTree/AMaster/data/ |
+-----------------------------------------------+
1 row in set (0.06 sec)
mysql> select format_path('/Users/mark/sandboxes/SmallTree/AMaster/data/mysql/proc.MYD') AS path;
+--------------------------+
| path |
+--------------------------+
| @@datadir/mysql/proc.MYD |
+--------------------------+
1 row in set (0.03 sec)Formats a normalized statement, truncating it if it's > 64 characters long.
Useful for printing statement related data from Performance Schema from the command line.
- statement (LONGTEXT): The statement to format.
VARCHAR(65)
mysql> SELECT sys.format_statement(digest_text)
-> FROM performance_schema.events_statements_summary_by_digest
-> ORDER by sum_timer_wait DESC limit 5;
+-------------------------------------------------------------------+
| sys.format_statement(digest_text) |
+-------------------------------------------------------------------+
| CREATE SQL SECURITY INVOKER VI ... KE ? AND `variable_value` > ? |
| CREATE SQL SECURITY INVOKER VI ... ait` IS NOT NULL , `esc` . ... |
| CREATE SQL SECURITY INVOKER VI ... ait` IS NOT NULL , `sys` . ... |
| CREATE SQL SECURITY INVOKER VI ... , `compressed_size` ) ) DESC |
| CREATE SQL SECURITY INVOKER VI ... LIKE ? ORDER BY `timer_start` |
+-------------------------------------------------------------------+
5 rows in set (0.00 sec)Takes a raw picoseconds value, and converts it to a human readable form.
Picoseconds are the precision that all latency values are printed in within Performance Schema, however are not user friendly when wanting to scan output from the command line.
- picoseconds (BIGINT UNSIGNED): The raw picoseconds value to convert.
VARCHAR(16) CHARSET UTF8
mysql> select format_time(342342342342345);
+------------------------------+
| format_time(342342342342345) |
+------------------------------+
| 00:05:42 |
+------------------------------+
1 row in set (0.00 sec)
mysql> select format_time(342342342);
+------------------------+
| format_time(342342342) |
+------------------------+
| 342.34 µs |
+------------------------+
1 row in set (0.00 sec)
mysql> select format_time(34234);
+--------------------+
| format_time(34234) |
+--------------------+
| 34.23 ns |
+--------------------+
1 row in set (0.00 sec)Determines whether instrumentation of an account is enabled within Performance Schema.
- in_host VARCHAR(60): The hostname of the account to check.
- in_user (VARCHAR(16)): The username of the account to check.
ENUM('YES', 'NO', 'PARTIAL')
mysql> SELECT sys.ps_is_account_enabled('localhost', 'root');
+------------------------------------------------+
| sys.ps_is_account_enabled('localhost', 'root') |
+------------------------------------------------+
| YES |
+------------------------------------------------+
1 row in set (0.01 sec)Outputs a JSON formatted stack of all statements, stages and events within Performance Schema for the specified thread.
- thd_id (BIGINT): The id of the thread to trace. This should match the thread_id column from the performance_schema.threads table.
(line separation added for output)
mysql> SELECT sys.ps_thread_stack(37, FALSE) AS thread_stack\G
*************************** 1. row ***************************
thread_stack: {"rankdir": "LR","nodesep": "0.10","stack_created": "2014-02-19 13:39:03",
"mysql_version": "5.7.3-m13","mysql_user": "root@localhost","events":
[{"nesting_event_id": "0", "event_id": "10", "timer_wait": 256.35, "event_info":
"sql/select", "wait_info": "select @@version_comment limit 1\nerrors: 0\nwarnings: 0\nlock time:
...Takes a source database name and synonym name, and then creates the synonym database with views that point to all of the tables within the source database.
Useful for creating a "ps" synonym for "performance_schema", or "is" instead of "information_schema", for example.
- in_db_name (VARCHAR(64)): ** The database name that you would like to create a synonym for.
- in_synonym (VARCHAR(64)): ** The database synonym name.
mysql> SHOW DATABASES;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| test |
+--------------------+
5 rows in set (0.00 sec)
mysql> CALL sys.create_synonym_db('performance_schema', 'ps');
+-------------------------------------+
| summary |
+-------------------------------------+
| Created 74 views in the ps database |
+-------------------------------------+
1 row in set (8.57 sec)
Query OK, 0 rows affected (8.57 sec)
mysql> SHOW DATABASES;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| ps |
| sys |
| test |
+--------------------+
6 rows in set (0.00 sec)
mysql> SHOW FULL TABLES FROM ps;
+-----------------------------------------+------------+
| Tables_in_ps | Table_type |
+-----------------------------------------+------------+
| accounts | VIEW |
| cond_instances | VIEW |
| events_stages_current | VIEW |
| events_stages_history | VIEW |
...Disable all background thread instrumentation within Performance Schema.
Requires the SUPER privilege for "SET sql_log_bin = 0;".
None.
mysql> CALL sys.ps_setup_disable_background_threads();
+--------------------------------+
| summary |
+--------------------------------+
| Disabled 18 background threads |
+--------------------------------+
1 row in set (0.00 sec)Disables instruments within Performance Schema matching the input pattern.
Requires the SUPER privilege for "SET sql_log_bin = 0;".
- in_pattern (VARCHAR(128)): A LIKE pattern match (using "%in_pattern%") of events to disable
To disable all mutex instruments:
mysql> CALL sys.ps_setup_disable_instrument('wait/synch/mutex');
+--------------------------+
| summary |
+--------------------------+
| Disabled 155 instruments |
+--------------------------+
1 row in set (0.02 sec)To disable just a the scpecific TCP/IP based network IO instrument:
mysql> CALL sys.ps_setup_disable_instrument('wait/io/socket/sql/server_tcpip_socket');
+------------------------+
| summary |
+------------------------+
| Disabled 1 instruments |
+------------------------+
1 row in set (0.00 sec)To enable all instruments:
mysql> CALL sys.ps_setup_disable_instrument('');
+--------------------------+
| summary |
+--------------------------+
| Disabled 547 instruments |
+--------------------------+
1 row in set (0.01 sec)Disable the given connection/thread in Performance Schema.
Requires the SUPER privilege for "SET sql_log_bin = 0;".
- in_connection_id (BIGINT): The connection ID (PROCESSLIST_ID from performance_schema.threads or the ID shown within SHOW PROCESSLIST)
mysql> CALL sys.ps_setup_disable_thread(3);
+-------------------+
| summary |
+-------------------+
| Disabled 1 thread |
+-------------------+
1 row in set (0.01 sec)To disable the current connection:
mysql> CALL sys.ps_setup_disable_thread(CONNECTION_ID());
+-------------------+
| summary |
+-------------------+
| Disabled 1 thread |
+-------------------+
1 row in set (0.00 sec)Enable all background thread instrumentation within Performance Schema.
Requires the SUPER privilege for "SET sql_log_bin = 0;".
None.
mysql> CALL sys.ps_setup_enable_background_threads();
+-------------------------------+
| summary |
+-------------------------------+
| Enabled 18 background threads |
+-------------------------------+
1 row in set (0.00 sec)Enables instruments within Performance Schema matching the input pattern.
Requires the SUPER privilege for "SET sql_log_bin = 0;".
- in_pattern (VARCHAR(128)): A LIKE pattern match (using "%in_pattern%") of events to enable
To enable all mutex instruments:
mysql> CALL sys.ps_setup_enable_instrument('wait/synch/mutex');
+-------------------------+
| summary |
+-------------------------+
| Enabled 155 instruments |
+-------------------------+
1 row in set (0.02 sec)To enable just a the scpecific TCP/IP based network IO instrument:
mysql> CALL sys.ps_setup_enable_instrument('wait/io/socket/sql/server_tcpip_socket');
+-----------------------+
| summary |
+-----------------------+
| Enabled 1 instruments |
+-----------------------+
1 row in set (0.00 sec)To enable all instruments:
mysql> CALL sys.ps_setup_enable_instrument('');
+-------------------------+
| summary |
+-------------------------+
| Enabled 547 instruments |
+-------------------------+
1 row in set (0.01 sec)Enable the given connection/thread in Performance Schema.
Requires the SUPER privilege for "SET sql_log_bin = 0;".
- in_connection_id (BIGINT): The connection ID (PROCESSLIST_ID from performance_schema.threads or the ID shown within SHOW PROCESSLIST)
mysql> CALL sys.ps_setup_enable_thread(3);
+------------------+
| summary |
+------------------+
| Enabled 1 thread |
+------------------+
1 row in set (0.01 sec)To enable the current connection:
mysql> CALL sys.ps_setup_enable_thread(CONNECTION_ID());
+------------------+
| summary |
+------------------+
| Enabled 1 thread |
+------------------+
1 row in set (0.00 sec)Reloads a saved Performance Schema configuration, so that you can alter the setup for debugging purposes, but restore it to a previous state.
Use the companion procedure - ps_setup_save(), to save a configuration.
Requires the SUPER privilege for "SET sql_log_bin = 0;".
None.
mysql> CALL sys.ps_setup_save();
Query OK, 0 rows affected (0.08 sec)
mysql> UPDATE performance_schema.setup_instruments SET enabled = 'YES', timed = 'YES';
Query OK, 547 rows affected (0.40 sec)
Rows matched: 784 Changed: 547 Warnings: 0
/* Run some tests that need more detailed instrumentation here */
mysql> CALL sys.ps_setup_reload_saved();
Query OK, 0 rows affected (0.32 sec)Resets the Performance Schema setup to the default settings.
- in_verbose (BOOLEAN): Whether to print each setup stage (including the SQL) whilst running.
mysql> CALL sys.ps_setup_reset_to_default(true)\G
*************************** 1. row ***************************
status: Resetting: setup_actors
DELETE
FROM performance_schema.setup_actors
WHERE NOT (HOST = '%' AND USER = '%' AND ROLE = '%')
1 row in set (0.00 sec)
*************************** 1. row ***************************
status: Resetting: setup_actors
INSERT IGNORE INTO performance_schema.setup_actors
VALUES ('%', '%', '%')
1 row in set (0.00 sec)
...
mysql> CALL sys.ps_setup_reset_to_default(false)G
Query OK, 0 rows affected (0.00 sec)Saves the current configuration of Performance Schema, so that you can alter the setup for debugging purposes, but restore it to a previous state.
Use the companion procedure - ps_setup_reload_saved(), to restore the saved config.
Requires the SUPER privilege for "SET sql_log_bin = 0;".
None.
mysql> CALL sys.ps_setup_save();
Query OK, 0 rows affected (0.08 sec)
mysql> UPDATE performance_schema.setup_instruments
-> SET enabled = 'YES', timed = 'YES';
Query OK, 547 rows affected (0.40 sec)
Rows matched: 784 Changed: 547 Warnings: 0
/* Run some tests that need more detailed instrumentation here */
mysql> CALL sys.ps_setup_reload_saved();
Query OK, 0 rows affected (0.32 sec)Shows all currently disable Performance Schema configuration.
- in_in_show_instruments (BOOLEAN): Whether to print disabled instruments (can print many items)
- in_in_show_threads (BOOLEAN): Whether to print disabled threads
mysql> CALL sys.ps_setup_show_disabled(TRUE, TRUE);
+----------------------------+
| performance_schema_enabled |
+----------------------------+
| 1 |
+----------------------------+
1 row in set (0.00 sec)
+--------------------+
| enabled_users |
+--------------------+
| 'mark'@'localhost' |
+--------------------+
1 row in set (0.00 sec)
+-------------+----------------------+---------+-------+
| object_type | objects | enabled | timed |
+-------------+----------------------+---------+-------+
| EVENT | mysql.% | NO | NO |
| EVENT | performance_schema.% | NO | NO |
| EVENT | information_schema.% | NO | NO |
| FUNCTION | mysql.% | NO | NO |
| FUNCTION | performance_schema.% | NO | NO |
| FUNCTION | information_schema.% | NO | NO |
| PROCEDURE | mysql.% | NO | NO |
| PROCEDURE | performance_schema.% | NO | NO |
| PROCEDURE | information_schema.% | NO | NO |
| TABLE | mysql.% | NO | NO |
| TABLE | performance_schema.% | NO | NO |
| TABLE | information_schema.% | NO | NO |
| TRIGGER | mysql.% | NO | NO |
| TRIGGER | performance_schema.% | NO | NO |
| TRIGGER | information_schema.% | NO | NO |
+-------------+----------------------+---------+-------+
15 rows in set (0.00 sec)
+----------------------------------+
| disabled_consumers |
+----------------------------------+
| events_stages_current |
| events_stages_history |
| events_stages_history_long |
| events_statements_history |
| events_statements_history_long |
| events_transactions_history |
| events_transactions_history_long |
| events_waits_current |
| events_waits_history |
| events_waits_history_long |
+----------------------------------+
10 rows in set (0.00 sec)
Empty set (0.00 sec)
+---------------------------------------------------------------------------------------+-------+
| disabled_instruments | timed |
+---------------------------------------------------------------------------------------+-------+
| wait/synch/mutex/sql/TC_LOG_MMAP::LOCK_tc | NO |
| wait/synch/mutex/sql/LOCK_des_key_file | NO |
| wait/synch/mutex/sql/MYSQL_BIN_LOG::LOCK_commit | NO |
...
| memory/sql/servers_cache | NO |
| memory/sql/udf_mem | NO |
| wait/lock/metadata/sql/mdl | NO |
+---------------------------------------------------------------------------------------+-------+
547 rows in set (0.00 sec)
Query OK, 0 rows affected (0.01 sec)Shows all currently enabled Performance Schema configuration.
- in_show_instruments (BOOLEAN): Whether to print enabled instruments (can print many items)
- in_show_threads (BOOLEAN): Whether to print enabled threads
mysql> CALL sys.ps_setup_show_enabled(TRUE, TRUE);
+----------------------------+
| performance_schema_enabled |
+----------------------------+
| 1 |
+----------------------------+
1 row in set (0.00 sec)
+---------------+
| enabled_users |
+---------------+
| '%'@'%' |
+---------------+
1 row in set (0.01 sec)
+----------------------+---------+-------+
| objects | enabled | timed |
+----------------------+---------+-------+
| mysql.% | NO | NO |
| performance_schema.% | NO | NO |
| information_schema.% | NO | NO |
| %.% | YES | YES |
+----------------------+---------+-------+
4 rows in set (0.01 sec)
+---------------------------+
| enabled_consumers |
+---------------------------+
| events_statements_current |
| global_instrumentation |
| thread_instrumentation |
| statements_digest |
+---------------------------+
4 rows in set (0.05 sec)
+--------------------------+-------------+
| enabled_threads | thread_type |
+--------------------------+-------------+
| innodb/srv_master_thread | BACKGROUND |
| root@localhost | FOREGROUND |
| root@localhost | FOREGROUND |
| root@localhost | FOREGROUND |
| root@localhost | FOREGROUND |
+--------------------------+-------------+
5 rows in set (0.03 sec)
+-------------------------------------+-------+
| enabled_instruments | timed |
+-------------------------------------+-------+
| wait/io/file/sql/map | YES |
| wait/io/file/sql/binlog | YES |
...
| statement/com/Error | YES |
| statement/com/ | YES |
| idle | YES |
+-------------------------------------+-------+
210 rows in set (0.08 sec)
Query OK, 0 rows affected (0.89 sec)Outputs a textual histogram graph of the average latency values across all normalized queries tracked within the Performance Schema events_statements_summary_by_digest table.
Can be used to show a very high level picture of what kind of latency distribution statements running within this instance have.
None.
mysql> CALL sys.ps_statement_avg_latency_histogram()G
*************************** 1. row ***************************
Performance Schema Statement Digest Average Latency Histogram:
. = 1 unit
* = 2 units
# = 3 units
(0 - 38ms) 240 | ################################################################################
(38 - 77ms) 38 | ......................................
(77 - 115ms) 3 | ...
(115 - 154ms) 62 | *******************************
(154 - 192ms) 3 | ...
(192 - 231ms) 0 |
(231 - 269ms) 0 |
(269 - 307ms) 0 |
(307 - 346ms) 0 |
(346 - 384ms) 1 | .
(384 - 423ms) 1 | .
(423 - 461ms) 0 |
(461 - 499ms) 0 |
(499 - 538ms) 0 |
(538 - 576ms) 0 |
(576 - 615ms) 1 | .
Total Statements: 350; Buckets: 16; Bucket Size: 38 ms;Traces all instrumentation within Performance Schema for a specific Statement Digest.
When finding a statement of interest within the performance_schema.events_statements_summary_by_digest table, feed the DIGEST MD5 value in to this procedure, set how long to poll for, and at what interval to poll, and it will generate a report of all statistics tracked within Performance Schema for that digest for the interval.
It will also attempt to generate an EXPLAIN for the longest running example of the digest during the interval.
Note this may fail, as Performance Schema truncates long SQL_TEXT values (and hence the EXPLAIN will fail due to parse errors).
- in_digest VARCHAR(32): The statement digest identifier you would like to analyze
- in_runtime (INT): The number of seconds to run analysis for (defaults to a minute)
- in_interval (DECIMAL(2,2)): The interval (in seconds, may be fractional) at which to try and take snapshots (defaults to a second)
- in_start_fresh (BOOLEAN): Whether to TRUNCATE the events_statements_history_long and events_stages_history_long tables before starting (default false)
- in_auto_enable (BOOLEAN): Whether to automatically turn on required consumers (default false)
mysql> call ps_analyze_statement_digest('891ec6860f98ba46d89dd20b0c03652c', 10, 0.1, true, true);
+--------------------+
| SUMMARY STATISTICS |
+--------------------+
| SUMMARY STATISTICS |
+--------------------+
1 row in set (9.11 sec)
+------------+-----------+-----------+-----------+---------------+------------+------------+
| executions | exec_time | lock_time | rows_sent | rows_examined | tmp_tables | full_scans |
+------------+-----------+-----------+-----------+---------------+------------+------------+
| 21 | 4.11 ms | 2.00 ms | 0 | 21 | 0 | 0 |
+------------+-----------+-----------+-----------+---------------+------------+------------+
1 row in set (9.11 sec)
+------------------------------------------+-------+-----------+
| event_name | count | latency |
+------------------------------------------+-------+-----------+
| stage/sql/checking query cache for query | 16 | 724.37 µs |
| stage/sql/statistics | 16 | 546.92 µs |
| stage/sql/freeing items | 18 | 520.11 µs |
| stage/sql/init | 51 | 466.80 µs |
...
| stage/sql/cleaning up | 18 | 11.92 µs |
| stage/sql/executing | 16 | 6.95 µs |
+------------------------------------------+-------+-----------+
17 rows in set (9.12 sec)
+---------------------------+
| LONGEST RUNNING STATEMENT |
+---------------------------+
| LONGEST RUNNING STATEMENT |
+---------------------------+
1 row in set (9.16 sec)
+-----------+-----------+-----------+-----------+---------------+------------+-----------+
| thread_id | exec_time | lock_time | rows_sent | rows_examined | tmp_tables | full_scan |
+-----------+-----------+-----------+-----------+---------------+------------+-----------+
| 166646 | 618.43 µs | 1.00 ms | 0 | 1 | 0 | 0 |
+-----------+-----------+-----------+-----------+---------------+------------+-----------+
1 row in set (9.16 sec)
// Truncated for clarity...
+-----------------------------------------------------------------+
| sql_text |
+-----------------------------------------------------------------+
| select hibeventhe0_.id as id1382_, hibeventhe0_.createdTime ... |
+-----------------------------------------------------------------+
1 row in set (9.17 sec)
+------------------------------------------+-----------+
| event_name | latency |
+------------------------------------------+-----------+
| stage/sql/init | 8.61 µs |
| stage/sql/Waiting for query cache lock | 453.23 µs |
| stage/sql/init | 331.07 ns |
| stage/sql/checking query cache for query | 43.04 µs |
...
| stage/sql/freeing items | 30.46 µs |
| stage/sql/cleaning up | 662.13 ns |
+------------------------------------------+-----------+
18 rows in set (9.23 sec)
+----+-------------+--------------+-------+---------------+-----------+---------+-------------+------+-------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+--------------+-------+---------------+-----------+---------+-------------+------+-------+
| 1 | SIMPLE | hibeventhe0_ | const | fixedTime | fixedTime | 775 | const,const | 1 | NULL |
+----+-------------+--------------+-------+---------------+-----------+---------+-------------+------+-------+
1 row in set (9.27 sec)
Query OK, 0 rows affected (9.28 sec)Dumps all data within Performance Schema for an instrumented thread, to create a DOT formatted graph file.
Each resultset returned from the procedure should be used for a complete graph
- in_thread_id (INT): The thread that you would like a stack trace for
- in_outfile (VARCHAR(255)): The filename the dot file will be written to
- in_max_runtime (DECIMAL(20,2)): The maximum time to keep collecting data. Use NULL to get the default which is 60 seconds.
- in_interval (DECIMAL(20,2)): How long to sleep between data collections. Use NULL to get the default which is 1 second.
- in_start_fresh (BOOLEAN): Whether to reset all Performance Schema data before tracing.
- in_auto_setup (BOOLEAN): Whether to disable all other threads and enable all consumers/instruments. This will also reset the settings at the end of the run.
- in_debug (BOOLEAN): Whether you would like to include file:lineno in the graph
mysql> CALL sys.ps_dump_thread_stack(25, CONCAT('/tmp/stack-', REPLACE(NOW(), ' ', '-'), '.dot'), NULL, NULL, TRUE, TRUE, TRUE);
+-------------------+
| summary |
+-------------------+
| Disabled 1 thread |
+-------------------+
1 row in set (0.00 sec)
+---------------------------------------------+
| Info |
+---------------------------------------------+
| Data collection starting for THREAD_ID = 25 |
+---------------------------------------------+
1 row in set (0.03 sec)
+-----------------------------------------------------------+
| Info |
+-----------------------------------------------------------+
| Stack trace written to /tmp/stack-2014-02-16-21:18:41.dot |
+-----------------------------------------------------------+
1 row in set (60.07 sec)
+-------------------------------------------------------------------+
| Convert to PDF |
+-------------------------------------------------------------------+
| dot -Tpdf -o /tmp/stack_25.pdf /tmp/stack-2014-02-16-21:18:41.dot |
+-------------------------------------------------------------------+
1 row in set (60.07 sec)
+-------------------------------------------------------------------+
| Convert to PNG |
+-------------------------------------------------------------------+
| dot -Tpng -o /tmp/stack_25.png /tmp/stack-2014-02-16-21:18:41.dot |
+-------------------------------------------------------------------+
1 row in set (60.07 sec)
+------------------+
| summary |
+------------------+
| Enabled 1 thread |
+------------------+
1 row in set (60.32 sec)Truncates all summary tables within Performance Schema, resetting all aggregated instrumentation as a snapshot.
Requires the SUPER privilege for "SET sql_log_bin = 0;".
- in_verbose (BOOLEAN): Whether to print each TRUNCATE statement before running
mysql> CALL sys.ps_truncate_all_tables(false);
+---------------------+
| summary |
+---------------------+
| Truncated 44 tables |
+---------------------+
1 row in set (0.10 sec)