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MDEV-11153 - Introduce status variables for table cache monitoring and tuning

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Status variables added: Table_open_cache_hits, Table_open_cache_misses,
Table_open_cache_overflows, Table_open_cache_active_instances.
This commit is contained in:
Sergey Vojtovich
2017-08-10 15:45:03 +04:00
parent 5d3ed9acdd
commit 613dd62a76
7 changed files with 99 additions and 9 deletions
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4
sql/mysqld.cc
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@ -8616,6 +8616,10 @@ SHOW_VAR status_vars[]= {
{"Subquery_cache_miss", (char*) &subquery_cache_miss, SHOW_LONG},
{"Table_locks_immediate", (char*) &locks_immediate, SHOW_LONG},
{"Table_locks_waited", (char*) &locks_waited, SHOW_LONG},
{"Table_open_cache_active_instances", (char*) &tc_active_instances, SHOW_UINT},
{"Table_open_cache_hits", (char*) offsetof(STATUS_VAR, table_open_cache_hits), SHOW_LONGLONG_STATUS},
{"Table_open_cache_misses", (char*) offsetof(STATUS_VAR, table_open_cache_misses), SHOW_LONGLONG_STATUS},
{"Table_open_cache_overflows", (char*) offsetof(STATUS_VAR, table_open_cache_overflows), SHOW_LONGLONG_STATUS},
#ifdef HAVE_MMAP
{"Tc_log_max_pages_used", (char*) &tc_log_max_pages_used, SHOW_LONG},
{"Tc_log_page_size", (char*) &tc_log_page_size, SHOW_LONG_NOFLUSH},