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MDEV-7084: innodb index stats inadequate using constant innodb_stats_sample_pages

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Use traditional statistics estimation by default (innodb-stats-traditional=true).
There could be performance regression for customers if there is a lot of
open table operations.
This commit is contained in:
Jan Lindström 2014-11-21 13:27:36 +02:00
parent 48f4961a12
commit b0febdb66e
4 changed files with 8 additions and 8 deletions
storage
innobase
handler
ha_innodb.cc
srv
srv0srv.c
xtradb
handler
ha_innodb.cc
srv
srv0srv.c

4
storage/innobase/handler/ha_innodb.cc
View file

@ -11746,8 +11746,8 @@ static MYSQL_SYSVAR_ULONGLONG(stats_modified_counter, srv_stats_modified_counter
static MYSQL_SYSVAR_BOOL(stats_traditional, srv_stats_sample_traditional,
PLUGIN_VAR_RQCMDARG,
"Enable traditional statistic calculation based on number of configured pages (default false)",
NULL, NULL, FALSE);
"Enable traditional statistic calculation based on number of configured pages (default true)",
NULL, NULL, TRUE);
static MYSQL_SYSVAR_BOOL(adaptive_hash_index, btr_search_enabled,
PLUGIN_VAR_OPCMDARG,

4
storage/innobase/srv/srv0srv.c
View file

@ -754,8 +754,8 @@ static ulint srv_meter_foreground[SRV_MASTER + 1];
UNIV_INTERN unsigned long long srv_stats_modified_counter = 0;
/* Enable traditional statistic calculation based on number of configured
pages default false. */
UNIV_INTERN my_bool srv_stats_sample_traditional = FALSE;
pages default true. */
UNIV_INTERN my_bool srv_stats_sample_traditional = TRUE;
/* The following values give info about the activity going on in
the database. They are protected by the server mutex. The arrays

4
storage/xtradb/handler/ha_innodb.cc
View file

@ -13114,8 +13114,8 @@ static MYSQL_SYSVAR_ULONGLONG(stats_modified_counter, srv_stats_modified_counter
static MYSQL_SYSVAR_BOOL(stats_traditional, srv_stats_sample_traditional,
PLUGIN_VAR_RQCMDARG,
"Enable traditional statistic calculation based on number of configured pages (default false)",
NULL, NULL, FALSE);
"Enable traditional statistic calculation based on number of configured pages (default true)",
NULL, NULL, TRUE);
static MYSQL_SYSVAR_ULINT(stats_auto_update, srv_stats_auto_update,
PLUGIN_VAR_RQCMDARG,

4
storage/xtradb/srv/srv0srv.c
View file

@ -416,8 +416,8 @@ UNIV_INTERN ulong srv_sys_stats_root_page = 0;
UNIV_INTERN unsigned long long srv_stats_modified_counter = 0;
/* Enable traditional statistic calculation based on number of configured
pages default false. */
UNIV_INTERN my_bool srv_stats_sample_traditional = FALSE;
pages default true. */
UNIV_INTERN my_bool srv_stats_sample_traditional = TRUE;
UNIV_INTERN ibool srv_use_doublewrite_buf = TRUE;
UNIV_INTERN ibool srv_use_atomic_writes = FALSE;