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Less shared variables loads under the mutex

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Part of MDEV-19515 - Improve connect speed
This commit is contained in:
Sergey Vojtovich 2019-05-15 23:23:27 +04:00
parent 8268fa881f
commit 218a68bbc5
1 changed files with 7 additions and 7 deletions
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14
sql/mysqld.cc
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@ -2688,10 +2688,15 @@ static bool cache_thread(THD *thd)
_db_pop_();
#endif
while (! wake_thread && ! kill_cached_threads)
while (!wake_thread)
{
int error= mysql_cond_timedwait(&COND_thread_cache, &LOCK_thread_cache,
&abstime);
if (kill_cached_threads)
{
mysql_cond_signal(&COND_flush_thread_cache);
break;
}
if (error == ETIMEDOUT || error == ETIME)
{
/*
@ -2703,14 +2708,9 @@ static bool cache_thread(THD *thd)
}
}
cached_thread_count--;
if (kill_cached_threads)
mysql_cond_signal(&COND_flush_thread_cache);
if (wake_thread)
if (auto connect= thread_cache.get())
{
CONNECT *connect;
wake_thread--;
connect= thread_cache.get();
mysql_mutex_unlock(&LOCK_thread_cache);
if (!(connect->create_thd(thd)))