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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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21
mysql-test/suite/perfschema/include/event_aggregate_setup.inc
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@ -111,8 +111,7 @@ update performance_schema.threads set instrumented='NO';
update performance_schema.setup_instruments set enabled='NO', timed='NO';
update performance_schema.setup_instruments set enabled='YES', timed='YES'
where name in ('wait/synch/mutex/sql/LOCK_connection_count',
'wait/synch/mutex/sql/LOCK_user_locks',
where name in ('wait/synch/mutex/sql/LOCK_user_locks',
'wait/synch/rwlock/sql/LOCK_grant',
'wait/io/file/sql/query_log',
'idle');
@ -181,8 +180,7 @@ begin
if (my_thread_id is not null) then
select username, event_name, count_star
from performance_schema.events_waits_summary_by_thread_by_event_name
where event_name in ('wait/synch/mutex/sql/LOCK_connection_count',
'wait/synch/mutex/sql/LOCK_user_locks',
where event_name in ('wait/synch/mutex/sql/LOCK_user_locks',
'wait/synch/rwlock/sql/LOCK_grant',
'wait/io/file/sql/query_log')
and thread_id = my_thread_id
@ -199,8 +197,7 @@ prepare dump_waits_account from
"select user, host, event_name, count_star
from performance_schema.events_waits_summary_by_account_by_event_name
where user like \'user%\'
and event_name in ('wait/synch/mutex/sql/LOCK_connection_count',
'wait/synch/mutex/sql/LOCK_user_locks',
and event_name in ('wait/synch/mutex/sql/LOCK_user_locks',
'wait/synch/rwlock/sql/LOCK_grant',
'wait/io/file/sql/query_log')
order by user, host, event_name;";
@ -209,8 +206,7 @@ prepare dump_waits_user from
"select user, event_name, count_star
from performance_schema.events_waits_summary_by_user_by_event_name
where user like \'user%\'
and event_name in ('wait/synch/mutex/sql/LOCK_connection_count',
'wait/synch/mutex/sql/LOCK_user_locks',
and event_name in ('wait/synch/mutex/sql/LOCK_user_locks',
'wait/synch/rwlock/sql/LOCK_grant',
'wait/io/file/sql/query_log')
order by user, event_name;";
@ -219,8 +215,7 @@ prepare dump_waits_host from
"select host, event_name, count_star
from performance_schema.events_waits_summary_by_host_by_event_name
where host=\'localhost\'
and event_name in ('wait/synch/mutex/sql/LOCK_connection_count',
'wait/synch/mutex/sql/LOCK_user_locks',
and event_name in ('wait/synch/mutex/sql/LOCK_user_locks',
'wait/synch/rwlock/sql/LOCK_grant',
'wait/io/file/sql/query_log')
order by host, event_name;";
@ -228,8 +223,7 @@ prepare dump_waits_host from
prepare dump_waits_global from
"select event_name, count_star
from performance_schema.events_waits_summary_global_by_event_name
where event_name in ('wait/synch/mutex/sql/LOCK_connection_count',
'wait/synch/mutex/sql/LOCK_user_locks',
where event_name in ('wait/synch/mutex/sql/LOCK_user_locks',
'wait/synch/rwlock/sql/LOCK_grant',
'wait/io/file/sql/query_log')
order by event_name;";
@ -237,8 +231,7 @@ prepare dump_waits_global from
prepare dump_waits_history from
"select event_name, count(event_name)
from performance_schema.events_waits_history_long
where event_name in ('wait/synch/mutex/sql/LOCK_connection_count',
'wait/synch/mutex/sql/LOCK_user_locks',
where event_name in ('wait/synch/mutex/sql/LOCK_user_locks',
'wait/synch/rwlock/sql/LOCK_grant',
'wait/io/file/sql/query_log')
group by event_name order by event_name;";