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Maintain connection_count atomically

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Removed LOCK_connection_count.

Removed duplicate denied_connections and connection_errors_max_connection
increment from create_new_thread(). Another increment done by
CONNECT::close_with_error().

Simplified away CONNECT::thread_count_incremented. Now close_with_error()
is always called with connection_count incremented.

Part of MDEV-19515 - Improve connect speed
This commit is contained in:
Sergey Vojtovich
2019-05-19 17:00:31 +04:00
parent 0bee021b78
commit a61baa7a25
21 changed files with 31 additions and 1628 deletions
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3
mysql-test/suite/perfschema/t/server_init.test
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@ -85,9 +85,6 @@ select count(name) from mutex_instances
select count(name) from mutex_instances
where name like "wait/synch/mutex/sql/LOCK_prepared_stmt_count";
select count(name) from mutex_instances
where name like "wait/synch/mutex/sql/LOCK_connection_count";
select count(name) from mutex_instances
where name like "wait/synch/mutex/sql/LOCK_server_started";