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Template DB ClickHouse by HTTP.xml
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Template DB ClickHouse by HTTP.xml
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<?xml version="1.0" encoding="UTF-8"?>
<zabbix_export>
<version>5.0</version>
<groups>
<group>
<name>Templates/Databases</name>
</group>
</groups>
<templates>
<template>
<template>Template DB ClickHouse by HTTP</template>
<name>Template DB ClickHouse by HTTP</name>
<description>Get node metrics from ClickHouse HTTP interface using HTTP agent.
Template tooling version used: 0.35</description>
<groups>
<group>
<name>Templates/Databases</name>
</group>
</groups>
<applications>
<application>
<name>ClickHouse</name>
</application>
<application>
<name>ClickHouse ZooKeeper</name>
</application>
<application>
<name>Zabbix raw items</name>
</application>
</applications>
<items>
<item>
<name>ClickHouse: Current distribute connections</name>
<type>DEPENDENT</type>
<key>clickhouse.connections.distribute</key>
<delay>0</delay>
<history>7d</history>
<description>Number of connections to remote servers sending data that was INSERTed into Distributed tables.</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "DistributedSend")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Current HTTP connections</name>
<type>DEPENDENT</type>
<key>clickhouse.connections.http</key>
<delay>0</delay>
<history>7d</history>
<description>Number of connections to HTTP server.</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "HTTPConnection")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Current Interserver connections</name>
<type>DEPENDENT</type>
<key>clickhouse.connections.interserver</key>
<delay>0</delay>
<history>7d</history>
<description>Number of connections from other replicas to fetch parts.</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "InterserverConnection")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Current MySQL connections</name>
<type>DEPENDENT</type>
<key>clickhouse.connections.mysql</key>
<delay>0</delay>
<history>7d</history>
<description>Number of connections to MySQL server.</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "MySQLConnection")].value.first()</params>
<error_handler>CUSTOM_VALUE</error_handler>
<error_handler_params>0</error_handler_params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Current TCP connections</name>
<type>DEPENDENT</type>
<key>clickhouse.connections.tcp</key>
<delay>0</delay>
<history>7d</history>
<description>Number of connections to TCP server (clients with native interface).</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "TCPConnection")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Get dictionaries info</name>
<type>HTTP_AGENT</type>
<key>clickhouse.dictionaries</key>
<history>0</history>
<trends>0</trends>
<value_type>TEXT</value_type>
<applications>
<application>
<name>Zabbix raw items</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$.data</params>
</step>
</preprocessing>
<url>{$CLICKHOUSE.SCHEME}://{HOST.CONN}:{$CLICKHOUSE.PORT}/</url>
<query_fields>
<query_field>
<name>query</name>
<value>SELECT * FROM system.dictionaries format JSON</value>
</query_field>
</query_fields>
<headers>
<header>
<name>X-ClickHouse-User</name>
<value>{$CLICKHOUSE.USER}</value>
</header>
<header>
<name>X-ClickHouse-Key</name>
<value>{$CLICKHOUSE.PASSWORD}</value>
</header>
</headers>
</item>
<item>
<name>ClickHouse: Current distributed files to insert</name>
<type>DEPENDENT</type>
<key>clickhouse.distributed.files</key>
<delay>0</delay>
<history>7d</history>
<description>Number of pending files to process for asynchronous insertion into Distributed tables. Number of files for every shard is summed.</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "DistributedFilesToInsert")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
<triggers>
<trigger>
<expression>{min(5m)}>{$CLICKHOUSE.DELAYED.FILES.DISTRIBUTED.COUNT.MAX.WARN}</expression>
<name>ClickHouse: Too many distributed files to insert (over {$CLICKHOUSE.DELAYED.FILES.DISTRIBUTED.COUNT.MAX.WARN} for 5 min)</name>
<priority>WARNING</priority>
<description>"Clickhouse servers and <remote_servers> in config.xml
https://clickhouse.tech/docs/en/operations/table_engines/distributed/"</description>
<manual_close>YES</manual_close>
</trigger>
</triggers>
</item>
<item>
<name>ClickHouse: Distributed connection fail with retry per second</name>
<type>DEPENDENT</type>
<key>clickhouse.distributed.files.fail.rate</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<description>"Connection failures after all retries in replicated DB connection pool"</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "DistributedConnectionFailAtAll")].value.first()</params>
<error_handler>CUSTOM_VALUE</error_handler>
<error_handler_params>0</error_handler_params>
</step>
<step>
<type>CHANGE_PER_SECOND</type>
<params/>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.events</key>
</master_item>
</item>
<item>
<name>ClickHouse: Distributed connection fail with retry per second</name>
<type>DEPENDENT</type>
<key>clickhouse.distributed.files.retry.rate</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<description>Connection retries in replicated DB connection pool</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "DistributedConnectionFailTry")].value.first()</params>
<error_handler>CUSTOM_VALUE</error_handler>
<error_handler_params>0</error_handler_params>
</step>
<step>
<type>CHANGE_PER_SECOND</type>
<params/>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.events</key>
</master_item>
</item>
<item>
<name>ClickHouse: Delayed insert queries</name>
<type>DEPENDENT</type>
<key>clickhouse.insert.delay</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<description>"Number of INSERT queries that are throttled due to high number of active data parts for partition in a MergeTree table."</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "DelayedInserts")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
<triggers>
<trigger>
<expression>{min(5m)}>{$CLICKHOUSE.DELAYED.INSERTS.MAX.WARN}</expression>
<name>ClickHouse: Too many throttled insert queries (over {$CLICKHOUSE.DELAYED.INSERTS.MAX.WARN) for 5 min)</name>
<priority>WARNING</priority>
<description>Clickhouse have INSERT queries that are throttled due to high number of active data parts for partition in a MergeTree, please decrease INSERT frequency</description>
<manual_close>YES</manual_close>
</trigger>
</triggers>
</item>
<item>
<name>ClickHouse: Inserted bytes per second</name>
<type>DEPENDENT</type>
<key>clickhouse.inserted_bytes.rate</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<units>Bps</units>
<description>The number of uncompressed bytes inserted in all tables.</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.event == "InsertedBytes")].value.first()</params>
<error_handler>CUSTOM_VALUE</error_handler>
<error_handler_params>0</error_handler_params>
</step>
<step>
<type>CHANGE_PER_SECOND</type>
<params/>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.events</key>
</master_item>
</item>
<item>
<name>ClickHouse: Inserted rows per second</name>
<type>DEPENDENT</type>
<key>clickhouse.inserted_rows.rate</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<description>The number of rows inserted in all tables.</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.event == "InsertedRows")].value.first()</params>
<error_handler>CUSTOM_VALUE</error_handler>
<error_handler_params>0</error_handler_params>
</step>
<step>
<type>CHANGE_PER_SECOND</type>
<params/>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.events</key>
</master_item>
</item>
<item>
<name>ClickHouse: New INSERT queries per second</name>
<type>DEPENDENT</type>
<key>clickhouse.insert_query.rate</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<description>Number of INSERT queries to be interpreted and potentially executed. Does not include queries that failed to parse or were rejected due to AST size limits, quota limits or limits on the number of simultaneously running queries. May include internal queries initiated by ClickHouse itself. Does not count subqueries.</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.event == "InsertQuery")].value.first()</params>
<error_handler>CUSTOM_VALUE</error_handler>
<error_handler_params>0</error_handler_params>
</step>
<step>
<type>CHANGE_PER_SECOND</type>
<params/>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.events</key>
</master_item>
</item>
<item>
<name>ClickHouse: Allocated bytes</name>
<type>DEPENDENT</type>
<key>clickhouse.jemalloc.allocated</key>
<delay>0</delay>
<history>7d</history>
<units>B</units>
<description>"Total number of bytes allocated by the application."</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "jemalloc.allocated")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.asynchronous_metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Mapped memory</name>
<type>DEPENDENT</type>
<key>clickhouse.jemalloc.mapped</key>
<delay>0</delay>
<history>7d</history>
<units>B</units>
<description>"Total number of bytes in active extents mapped by the allocator."</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "jemalloc.mapped")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.asynchronous_metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Resident memory</name>
<type>DEPENDENT</type>
<key>clickhouse.jemalloc.resident</key>
<delay>0</delay>
<history>7d</history>
<units>B</units>
<description>"Maximum number of bytes in physically resident data pages mapped by the allocator,
comprising all pages dedicated to allocator metadata, pages backing active allocations,
and unused dirty pages."</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "jemalloc.resident")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.asynchronous_metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Max count of parts per partition across all tables</name>
<type>DEPENDENT</type>
<key>clickhouse.max.part.count.for.partition</key>
<delay>0</delay>
<history>7d</history>
<description>"Clickhouse MergeTree table engine split each INSERT query to partitions (PARTITION BY expression) and add one or more PARTS per INSERT inside each partition,
after that background merge process run."</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "MaxPartCountForPartition")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.asynchronous_metrics</key>
</master_item>
<triggers>
<trigger>
<expression>{min(5m)}>{$CLICKHOUSE.PARTS.PER.PARTITION.WARN} * 0.9</expression>
<name>ClickHouse: Too many MergeTree parts (over 90% of {$CLICKHOUSE.PARTS.PER.PARTITION.WARN})</name>
<priority>WARNING</priority>
<description>"Descease INSERT queries frequency.
Clickhouse MergeTree table engine split each INSERT query to partitions (PARTITION BY expression)
and add one or more PARTS per INSERT inside each partition,
after that background merge process run, and when you have too much unmerged parts inside partition,
SELECT queries performance can significate degrade, so clickhouse try delay insert, or abort it"</description>
<manual_close>YES</manual_close>
</trigger>
</triggers>
</item>
<item>
<name>ClickHouse: Memory used for queries</name>
<type>DEPENDENT</type>
<key>clickhouse.memory.tracking</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<units>B</units>
<description>"Total amount of memory (bytes) allocated in currently executing queries."</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "MemoryTracking")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Memory used for background merges</name>
<type>DEPENDENT</type>
<key>clickhouse.memory.tracking.background</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<units>B</units>
<description>"Total amount of memory (bytes) allocated in background processing pool (that is dedicated for backround merges, mutations and fetches).
Note that this value may include a drift when the memory was allocated in a context of background processing pool and freed in other context or vice-versa. This happens naturally due to caches for tables indexes and doesn't indicate memory leaks."</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "MemoryTrackingInBackgroundProcessingPool")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Memory used for backround moves</name>
<type>DEPENDENT</type>
<key>clickhouse.memory.tracking.background.moves</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<units>B</units>
<description>"Total amount of memory (bytes) allocated in background processing pool (that is dedicated for backround moves). Note that this value may include a drift when the memory was allocated in a context of background processing pool and freed in other context or vice-versa.
This happens naturally due to caches for tables indexes and doesn't indicate memory leaks."</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "MemoryTrackingInBackgroundMoveProcessingPool")].value.first()</params>
<error_handler>CUSTOM_VALUE</error_handler>
<error_handler_params>0</error_handler_params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Memory used for merges</name>
<type>DEPENDENT</type>
<key>clickhouse.memory.tracking.merges</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<units>B</units>
<description>"Total amount of memory (bytes) allocated for background merges. Included in MemoryTrackingInBackgroundProcessingPool. Note that this value may include a drift when the memory was allocated in a context of background processing pool and freed in other context or vice-versa.
This happens naturally due to caches for tables indexes and doesn't indicate memory leaks."</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "MemoryTrackingForMerges")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Memory used for background schedule pool</name>
<type>DEPENDENT</type>
<key>clickhouse.memory.tracking.schedule.pool</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<units>B</units>
<description>"Total amount of memory (bytes) allocated in background schedule pool (that is dedicated for bookkeeping tasks of Replicated tables)."</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "MemoryTrackingInBackgroundSchedulePool")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Current running merges</name>
<type>DEPENDENT</type>
<key>clickhouse.merge.current</key>
<delay>0</delay>
<history>7d</history>
<description>Number of executing background merges</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "Merge")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Uncompressed bytes merged per second</name>
<type>DEPENDENT</type>
<key>clickhouse.merge_bytes.rate</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<units>Bps</units>
<description>Uncompressed bytes that were read for background merges</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.event == "MergedUncompressedBytes")].value.first()</params>
<error_handler>CUSTOM_VALUE</error_handler>
<error_handler_params>0</error_handler_params>
</step>
<step>
<type>CHANGE_PER_SECOND</type>
<params/>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.events</key>
</master_item>
</item>
<item>
<name>ClickHouse: Merged rows per second</name>
<type>DEPENDENT</type>
<key>clickhouse.merge_rows.rate</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<description>Rows read for background merges.</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.event == "MergedRows")].value.first()</params>
<error_handler>CUSTOM_VALUE</error_handler>
<error_handler_params>0</error_handler_params>
</step>
<step>
<type>CHANGE_PER_SECOND</type>
<params/>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.events</key>
</master_item>
</item>
<item>
<name>ClickHouse: Network errors per second</name>
<type>DEPENDENT</type>
<key>clickhouse.network.error.rate</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<description>Network errors (timeouts and connection failures) during query execution, background pool tasks and DNS cache update.</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.event == "NetworkErrors")].value.first()</params>
<error_handler>CUSTOM_VALUE</error_handler>
<error_handler_params>0</error_handler_params>
</step>
<step>
<type>CHANGE_PER_SECOND</type>
<params/>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.events</key>
</master_item>
<triggers>
<trigger>
<expression>{min(5m)}>{$CLICKHOUSE.NETWORK.ERRORS.MAX.WARN}</expression>
<name>ClickHouse: Too many network errors (over {$CLICKHOUSE.NETWORK.ERRORS.MAX.WARN} in 5m)</name>
<priority>WARNING</priority>
<description>Number of errors (timeouts and connection failures) during query execution, background pool tasks and DNS cache update is too high.</description>
</trigger>
</triggers>
</item>
<item>
<name>ClickHouse: Ping</name>
<type>HTTP_AGENT</type>
<key>clickhouse.ping</key>
<history>7d</history>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<valuemap>
<name>Service state</name>
</valuemap>
<preprocessing>
<step>
<type>REGEX</type>
<params>Ok\.
1</params>
<error_handler>CUSTOM_VALUE</error_handler>
<error_handler_params>0</error_handler_params>
</step>
<step>
<type>DISCARD_UNCHANGED_HEARTBEAT</type>
<params>10m</params>
</step>
</preprocessing>
<url>{$CLICKHOUSE.SCHEME}://{HOST.CONN}:{$CLICKHOUSE.PORT}/ping</url>
<status_codes/>
</item>
<item>
<name>ClickHouse: Longest currently running query time</name>
<type>HTTP_AGENT</type>
<key>clickhouse.process.elapsed</key>
<history>7d</history>
<value_type>FLOAT</value_type>
<units>s</units>
<description>Get longest running query.</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<url>{$CLICKHOUSE.SCHEME}://{HOST.CONN}:{$CLICKHOUSE.PORT}/</url>
<query_fields>
<query_field>
<name>query</name>
<value>SELECT max(elapsed) FROM system.processes</value>
</query_field>
</query_fields>
<headers>
<header>
<name>X-ClickHouse-User</name>
<value>{$CLICKHOUSE.USER}</value>
</header>
<header>
<name>X-ClickHouse-Key</name>
<value>{$CLICKHOUSE.PASSWORD}</value>
</header>
</headers>
<triggers>
<trigger>
<expression>{last()}>{$CLICKHOUSE.QUERY_TIME.MAX.WARN}</expression>
<name>ClickHouse: There are queries running more than {$CLICKHOUSE.QUERY_TIME.MAX.WARN} seconds</name>
<priority>AVERAGE</priority>
<manual_close>YES</manual_close>
</trigger>
</triggers>
</item>
<item>
<name>ClickHouse: Current running queries</name>
<type>DEPENDENT</type>
<key>clickhouse.query.current</key>
<delay>0</delay>
<history>7d</history>
<description>Number of executing queries</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "Query")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: New queries per second</name>
<type>DEPENDENT</type>
<key>clickhouse.query.rate</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<description>Number of queries to be interpreted and potentially executed. Does not include queries that failed to parse or were rejected due to AST size limits, quota limits or limits on the number of simultaneously running queries. May include internal queries initiated by ClickHouse itself. Does not count subqueries.</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.data.event == "Query")].value.first()</params>
<error_handler>CUSTOM_VALUE</error_handler>
<error_handler_params>0</error_handler_params>
</step>
<step>
<type>CHANGE_PER_SECOND</type>
<params/>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.events</key>
</master_item>
</item>
<item>
<name>ClickHouse: Read syscalls in fly</name>
<type>DEPENDENT</type>
<key>clickhouse.read</key>
<delay>0</delay>
<history>7d</history>
<description>Number of read (read, pread, io_getevents, etc.) syscalls in fly</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "Read")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.metrics</key>
</master_item>
</item>
<item>
<name>ClickHouse: Read bytes per second</name>
<type>DEPENDENT</type>
<key>clickhouse.read_bytes.rate</key>
<delay>0</delay>
<history>7d</history>
<value_type>FLOAT</value_type>
<units>Bps</units>
<description>"Number of bytes (the number of bytes before decompression) read from compressed sources (files, network)."</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.event == "ReadCompressedBytes")].value.first()</params>
<error_handler>CUSTOM_VALUE</error_handler>
<error_handler_params>0</error_handler_params>
</step>
<step>
<type>CHANGE_PER_SECOND</type>
<params/>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.events</key>
</master_item>
</item>
<item>
<name>ClickHouse: Get replicas info</name>
<type>HTTP_AGENT</type>
<key>clickhouse.replicas</key>
<history>0</history>
<trends>0</trends>
<value_type>TEXT</value_type>
<applications>
<application>
<name>Zabbix raw items</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$.data</params>
</step>
</preprocessing>
<url>{$CLICKHOUSE.SCHEME}://{HOST.CONN}:{$CLICKHOUSE.PORT}/</url>
<query_fields>
<query_field>
<name>query</name>
<value>SELECT database, table, is_readonly, is_session_expired, future_parts, parts_to_check, queue_size, inserts_in_queue, merges_in_queue, log_max_index, log_pointer, total_replicas, active_replicas, log_max_index - log_pointer as replica_lag FROM system.replicas format JSON</value>
</query_field>
</query_fields>
<headers>
<header>
<name>X-ClickHouse-User</name>
<value>{$CLICKHOUSE.USER}</value>
</header>
<header>
<name>X-ClickHouse-Key</name>
<value>{$CLICKHOUSE.PASSWORD}</value>
</header>
</headers>
</item>
<item>
<name>ClickHouse: Replication lag across all tables</name>
<type>DEPENDENT</type>
<key>clickhouse.replicas.max.absolute.delay</key>
<delay>0</delay>
<history>7d</history>
<units>s</units>
<description>Maximum replica queue delay relative to current time</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "ReplicasMaxAbsoluteDelay")].value.first()</params>
</step>
</preprocessing>
<master_item>
<key>clickhouse.system.asynchronous_metrics</key>
</master_item>
<triggers>
<trigger>
<expression>{min(5m)}>{$CLICKHOUSE.REPLICA.MAX.WARN}</expression>
<name>ClickHouse: Replication lag is too high (over {$CLICKHOUSE.REPLICA.MAX.WARN} sec for 5min)</name>
<priority>WARNING</priority>
<description>"When replica have too much lag, it can be skipped from Distributed SELECT Queries without errors
and you will have wrong query results."</description>
<manual_close>YES</manual_close>
</trigger>
</triggers>
</item>
<item>
<name>ClickHouse: Total number read-only Replicas</name>
<type>DEPENDENT</type>
<key>clickhouse.replicas.readonly.total</key>
<delay>0</delay>
<history>7d</history>
<description>"Number of Replicated tables that are currently in readonly state
due to re-initialization after ZooKeeper session loss
or due to startup without ZooKeeper configured."</description>
<applications>
<application>
<name>ClickHouse</name>
</application>
</applications>
<preprocessing>
<step>
<type>JSONPATH</type>
<params>$[?(@.metric == "ReadonlyReplica")].value.first()</params>
</step>
</preprocessing>