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MDEV-18661 loading the audit plugin causes performance regression.

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Plugin fixed to not lock the LOCK_operations when not active.
Server fixed to lock the LOCK_plugin less - do it once per
thread and then only if a plugin was installed/uninstalled.
This commit is contained in:
Alexey Botchkov
2019-06-15 01:02:55 +04:00
parent 5b65d61d93
commit 65e0c9b91b
9 changed files with 97 additions and 47 deletions
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sql/sql_audit.h
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@ -60,6 +60,7 @@ static inline void mysql_audit_notify(THD *thd, uint event_class,
#define mysql_audit_connection_enabled() 0
#define mysql_audit_table_enabled() 0
#endif
extern my_bool mysql_audit_release_required(THD *thd);
extern void mysql_audit_release(THD *thd);
#define MAX_USER_HOST_SIZE 512