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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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3
sql/sql_connect.cc
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@ -1326,7 +1326,8 @@ void do_handle_one_connection(THD *thd_arg)
while (thd_is_connection_alive(thd))
{
mysql_audit_release(thd);
if (mysql_audit_release_required(thd))
mysql_audit_release(thd);
if (do_command(thd))
break;
}