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1e5d989d2a
We always defined PFS_SKIP_BUFFER_MUTEX_RWLOCK, that is, the latches of the buffer pool blocks were never instrumented in PERFORMANCE_SCHEMA. For some reason, the debug_latch (which enforce proper usage of buffer-fixing in debug builds) was instrumented.
58 lines
2.2 KiB
Text
58 lines
2.2 KiB
Text
UPDATE performance_schema.setup_instruments SET enabled = 'NO', timed = 'YES';
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UPDATE performance_schema.setup_instruments SET enabled = 'YES'
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WHERE name like 'wait/synch/sxlock/%';
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TRUNCATE TABLE performance_schema.events_waits_history_long;
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TRUNCATE TABLE performance_schema.events_waits_history;
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TRUNCATE TABLE performance_schema.events_waits_current;
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select name from performance_schema.setup_instruments
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where name like "wait/synch/sxlock/%" order by name;
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name
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wait/synch/sxlock/innodb/btr_search_latch
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wait/synch/sxlock/innodb/dict_operation_lock
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wait/synch/sxlock/innodb/fil_space_latch
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wait/synch/sxlock/innodb/fts_cache_init_rw_lock
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wait/synch/sxlock/innodb/fts_cache_rw_lock
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wait/synch/sxlock/innodb/index_tree_rw_lock
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wait/synch/sxlock/innodb/trx_i_s_cache_lock
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wait/synch/sxlock/innodb/trx_purge_latch
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select name from performance_schema.rwlock_instances
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where name in
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(
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'wait/synch/sxlock/innodb/btr_search_latch',
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'wait/synch/sxlock/innodb/checkpoint_lock',
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'wait/synch/sxlock/innodb/dict_operation_lock',
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'wait/synch/sxlock/innodb/trx_i_s_cache_lock',
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'wait/synch/sxlock/innodb/trx_purge_latch'
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)
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order by name;
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name
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wait/synch/sxlock/innodb/btr_search_latch
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wait/synch/sxlock/innodb/btr_search_latch
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wait/synch/sxlock/innodb/btr_search_latch
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wait/synch/sxlock/innodb/btr_search_latch
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wait/synch/sxlock/innodb/btr_search_latch
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wait/synch/sxlock/innodb/btr_search_latch
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wait/synch/sxlock/innodb/btr_search_latch
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wait/synch/sxlock/innodb/btr_search_latch
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wait/synch/sxlock/innodb/dict_operation_lock
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wait/synch/sxlock/innodb/trx_i_s_cache_lock
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wait/synch/sxlock/innodb/trx_purge_latch
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drop table if exists t1;
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create table t1(a int) engine=innodb;
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begin;
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insert into t1 values (1), (2), (3);
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insert into t1 values (1), (2), (3);
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insert into t1 values (1), (2), (3);
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commit;
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drop table t1;
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select operation from performance_schema.events_waits_history_long
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where event_name like "wait/synch/sxlock/%"
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and operation = "shared_lock" limit 1;
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operation
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shared_lock
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select operation from performance_schema.events_waits_history_long
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where event_name like "wait/synch/sxlock/%"
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and operation = "exclusive_lock" limit 1;
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operation
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exclusive_lock
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UPDATE performance_schema.setup_instruments SET enabled = 'YES', timed = 'YES';
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