[fix](config) change segment_cache_fd_percentage and inverted_index_f…

…d_number_limit_percent default value (#42224)

change segment_cache_fd_percentage and
inverted_index_fd_number_limit_percent default value from 40% to 20% to
avoid too many open files.

be/src/common/config.cpp

@@ -1011,7 +1011,7 @@ DEFINE_String(inverted_index_searcher_cache_limit, "10%");
 // set `true` to enable insert searcher into cache when write inverted index data
 DEFINE_Bool(enable_write_index_searcher_cache, "false");
 DEFINE_Bool(enable_inverted_index_cache_check_timestamp, "true");
-DEFINE_Int32(inverted_index_fd_number_limit_percent, "40"); // 40%
+DEFINE_Int32(inverted_index_fd_number_limit_percent, "20"); // 20%
 
 // inverted index match bitmap cache size
 DEFINE_String(inverted_index_query_cache_limit, "10%");