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Move thread re-initialisation out of cache_thread

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It mostly duplicates code of do_handle_one_connection(). Move it there,
so that it is easier to simplify it in future.

Moved PSI_CALL_delete_current_thread()/_db_pop_() out of mutex. Call them
consistently in all cases, unlike before:
- called for reused threads
- called for flushed threads
- called for threads that go down after 5 minutes timeout
- not called for threads attempting to cache themselves during flush
- not called for threads attempting to cache themselves when cache is full

Part of MDEV-19515 - Improve connect speed
This commit is contained in:
Sergey Vojtovich
2019-05-18 23:01:44 +04:00
parent ebc55c8577
commit 34dfcbe3a6
3 changed files with 43 additions and 44 deletions
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sql/mysqld.h
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@@ -79,7 +79,7 @@ void close_connection(THD *thd, uint sql_errno= 0);
void handle_connection_in_main_thread(CONNECT *thd);
void create_thread_to_handle_connection(CONNECT *connect);
void unlink_thd(THD *thd);
bool cache_thread(THD *thd);
CONNECT *cache_thread(THD *thd);
void flush_thread_cache();
void refresh_status(THD *thd);
bool is_secure_file_path(char *path);