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47 lines
1.8 KiB
Text
47 lines
1.8 KiB
Text
update performance_schema.setup_instruments set enabled='NO';
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update performance_schema.setup_consumers set enabled='YES';
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update performance_schema.setup_instruments set enabled='YES'
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where name like "wait/synch/mutex/mysys/THR_LOCK_myisam";
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drop table if exists test.t1;
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truncate table performance_schema.events_waits_current;
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truncate table performance_schema.events_waits_history;
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truncate table performance_schema.events_waits_history_long;
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show global variables like "thread_handling";
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Variable_name Value
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thread_handling no-threads
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show status like "Performance_schema_thread_instances_lost";
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Variable_name Value
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Performance_schema_thread_instances_lost 0
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create table test.t1(a int) engine=MYISAM;
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show global variables like "performance_schema";
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Variable_name Value
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performance_schema ON
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show global variables like "performance_schema_max_thread%";
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Variable_name Value
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performance_schema_max_thread_classes 50
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performance_schema_max_thread_instances 50
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select count(*) from performance_schema.threads
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where name like "thread/sql/main";
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count(*)
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1
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select count(*) from performance_schema.threads
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where name like "thread/sql/OneConnection";
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count(*)
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0
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select event_name, operation,
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left(source, locate(":", source)) as short_source
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from performance_schema.events_waits_current;
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event_name operation short_source
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wait/synch/mutex/mysys/THR_LOCK_myisam lock
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select event_name, operation,
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left(source, locate(":", source)) as short_source
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from performance_schema.events_waits_history;
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event_name operation short_source
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wait/synch/mutex/mysys/THR_LOCK_myisam lock
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select event_name, operation,
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left(source, locate(":", source)) as short_source
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from performance_schema.events_waits_history_long;
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event_name operation short_source
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wait/synch/mutex/mysys/THR_LOCK_myisam lock
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update performance_schema.setup_instruments set enabled='YES';
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drop table test.t1;
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