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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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4
sql/sql_class.cc
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@ -776,6 +776,9 @@ THD::THD(bool is_wsrep_applier)
waiting_on_group_commit(FALSE), has_waiter(FALSE),
spcont(NULL),
m_parser_state(NULL),
#ifndef EMBEDDED_LIBRARY
audit_plugin_version(-1),
#endif
#if defined(ENABLED_DEBUG_SYNC)
debug_sync_control(0),
#endif /* defined(ENABLED_DEBUG_SYNC) */
@ -1562,7 +1565,6 @@ THD::~THD()
mdl_context.destroy();
ha_close_connection(this);
mysql_audit_release(this);
plugin_thdvar_cleanup(this);
main_security_ctx.destroy();