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Avoid taking LOCK_thread_count for thread_count protection

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Replaced wait on COND_thread_count with busy waiting with 1 millisecond
sleep.

Aim is to reduce usage of LOCK_thread_count and COND_thread_count.
This commit is contained in:
Sergey Vojtovich
2019-01-29 01:13:47 +04:00
parent 8553525931
commit 4b3656a44d
4 changed files with 7 additions and 34 deletions
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9
sql/sql_parse.cc
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@ -1077,10 +1077,6 @@ void bootstrap(MYSQL_FILE *file)
thd->profiling.set_query_source(thd->query(), length);
#endif
/*
We don't need to obtain LOCK_thread_count here because in bootstrap
mode we have only one thread.
*/
thd->set_time();
Parser_state parser_state;
if (parser_state.init(thd, thd->query(), length))
@ -8994,9 +8990,6 @@ THD *find_thread_by_id(longlong id, bool query_id)
@param id Thread id or query id
@param kill_signal Should it kill the query or the connection
@param type Type of id: thread id or query id
@note
This is written such that we have a short lock on LOCK_thread_count
*/
uint
@ -9061,8 +9054,6 @@ kill_one_thread(THD *thd, longlong id, killed_state kill_signal, killed_type typ
@param only_kill_query Should it kill the query or the connection
@note
This is written such that we have a short lock on LOCK_thread_count
If we can't kill all threads because of security issues, no threads
are killed.
*/