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UPDATE performance_schema.setup_instruments SET enabled = 'NO', timed = 'YES';
UPDATE performance_schema.setup_instruments SET enabled = 'YES'
WHERE name like 'wait/synch/sxlock/%';
UPDATE performance_schema.setup_instruments SET enabled = 'YES'
WHERE name like 'wait/synch/rwlock/innodb/%';
SELECT DISTINCT name FROM performance_schema.setup_instruments
WHERE name LIKE 'wait/synch/rwlock/innodb/%'
AND name!='wait/synch/rwlock/innodb/btr_search_latch' ORDER BY name;
name
wait/synch/rwlock/innodb/dict_operation_lock
wait/synch/rwlock/innodb/fil_space_latch
wait/synch/rwlock/innodb/trx_i_s_cache_lock
wait/synch/rwlock/innodb/trx_purge_latch
TRUNCATE TABLE performance_schema.events_waits_history_long;
TRUNCATE TABLE performance_schema.events_waits_history;
TRUNCATE TABLE performance_schema.events_waits_current;
select name from performance_schema.setup_instruments
where name like "wait/synch/sxlock/%" order by name;
name
wait/synch/sxlock/innodb/index_tree_rw_lock
SELECT DISTINCT name FROM performance_schema.rwlock_instances
WHERE name LIKE 'wait/synch/sxlock/innodb/%'
ORDER BY name;
name
wait/synch/sxlock/innodb/index_tree_rw_lock
create table t1(a int) engine=innodb;
begin;
insert into t1 values (1), (2), (3);
insert into t1 values (1), (2), (3);
insert into t1 values (1), (2), (3);
commit;
drop table t1;
SELECT DISTINCT event_name FROM performance_schema.events_waits_history_long
WHERE event_name LIKE 'wait/synch/rwlock/innodb/%'
AND event_name NOT IN
('wait/synch/rwlock/innodb/btr_search_latch',
'wait/synch/rwlock/innodb/trx_purge_latch')
ORDER BY event_name;
event_name
wait/synch/rwlock/innodb/dict_operation_lock
wait/synch/rwlock/innodb/fil_space_latch
select operation from performance_schema.events_waits_history_long
where event_name like "wait/synch/sxlock/%"
and operation = "shared_lock" limit 1;
operation
shared_lock
select operation from performance_schema.events_waits_history_long
where event_name like "wait/synch/sxlock/%"
and operation = "exclusive_lock" limit 1;
operation
exclusive_lock
UPDATE performance_schema.setup_instruments SET enabled = 'YES', timed = 'YES';
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