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show databases;
Database
information_schema
mtr
mysql
performance_schema
test
select count(*) from performance_schema.performance_timers;
count(*)
5
select count(*) from performance_schema.setup_consumers;
count(*)
12
select count(*) > 3 from performance_schema.setup_instruments;
count(*) > 3
1
select count(*) from performance_schema.setup_timers;
count(*)
4
show engine PERFORMANCE_SCHEMA status;
show status like "performance_schema%";
select * from performance_schema.setup_instruments
where name like "stage/%" and enabled='YES';
NAME ENABLED TIMED
select * from performance_schema.events_stages_summary_global_by_event_name
where count_star > 0;
EVENT_NAME COUNT_STAR SUM_TIMER_WAIT MIN_TIMER_WAIT AVG_TIMER_WAIT MAX_TIMER_WAIT
select * from performance_schema.events_stages_summary_by_thread_by_event_name
where count_star > 0;
THREAD_ID EVENT_NAME COUNT_STAR SUM_TIMER_WAIT MIN_TIMER_WAIT AVG_TIMER_WAIT MAX_TIMER_WAIT
select * from performance_schema.events_stages_summary_by_user_by_event_name
where count_star > 0;
USER EVENT_NAME COUNT_STAR SUM_TIMER_WAIT MIN_TIMER_WAIT AVG_TIMER_WAIT MAX_TIMER_WAIT
select * from performance_schema.events_stages_summary_by_host_by_event_name
where count_star > 0;
HOST EVENT_NAME COUNT_STAR SUM_TIMER_WAIT MIN_TIMER_WAIT AVG_TIMER_WAIT MAX_TIMER_WAIT
select * from performance_schema.events_stages_summary_by_account_by_event_name
where count_star > 0;
USER HOST EVENT_NAME COUNT_STAR SUM_TIMER_WAIT MIN_TIMER_WAIT AVG_TIMER_WAIT MAX_TIMER_WAIT
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