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update performance_schema.SETUP_INSTRUMENTS set enabled='YES'
where name like "wait/synch/mutex/mysys/THR_LOCK_myisam";
drop table if exists test.t1;
drop table if exists test.t2;
drop table if exists test.t3;
truncate table performance_schema.EVENTS_WAITS_HISTORY_LONG;
show variables like "thread_handling";
Variable_name Value
thread_handling one-thread-per-connection
"----------------- Connection 1"
create table test.t1(a int) engine=MYISAM;
"----------------- Connection 2"
create table test.t2(a int) engine=MYISAM;
"----------------- Connection 3"
create table test.t3(a int) engine=MYISAM;
"----------------- Connection default"
execute stmt_dump_events using @tid;
event_name short_source operation number_of_bytes
wait/synch/mutex/mysys/THR_LOCK_myisam mi_create.c: lock NULL
execute stmt_dump_thread using @tid;
name
thread/sql/one_connection
execute stmt_dump_events using @tid;
event_name short_source operation number_of_bytes
wait/synch/mutex/mysys/THR_LOCK_myisam mi_create.c: lock NULL
execute stmt_dump_thread using @tid;
name
thread/sql/one_connection
execute stmt_dump_events using @tid;
event_name short_source operation number_of_bytes
wait/synch/mutex/mysys/THR_LOCK_myisam mi_create.c: lock NULL
execute stmt_dump_thread using @tid;
name
thread/sql/one_connection
drop table test.t1;
drop table test.t2;
drop table test.t3;
update performance_schema.SETUP_INSTRUMENTS set enabled='YES';
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