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1a2b494100
Make check_db_dir_existence() use a cache of existing directories clear the cache whenever any directory is removed. With this, the cost of check_db_dir_existence() will usually be a cost of acquiring/releasing a non-contended readwrite lock in shared mode, much less than going to the kernel and filesystem to check for file existence
88 lines
3.7 KiB
Plaintext
88 lines
3.7 KiB
Plaintext
select * from performance_schema.setup_instruments;
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select * from performance_schema.setup_instruments
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where name like 'Wait/Synch/Mutex/sql/%'
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and name not in ('wait/synch/mutex/sql/DEBUG_SYNC::mutex')
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order by name limit 10;
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NAME ENABLED TIMED
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wait/synch/mutex/sql/Ack_receiver::mutex YES YES
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wait/synch/mutex/sql/Cversion_lock YES YES
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wait/synch/mutex/sql/Delayed_insert::mutex YES YES
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wait/synch/mutex/sql/Event_scheduler::LOCK_scheduler_state YES YES
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wait/synch/mutex/sql/gtid_waiting::LOCK_gtid_waiting YES YES
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wait/synch/mutex/sql/hash_filo::lock YES YES
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wait/synch/mutex/sql/HA_DATA_PARTITION::LOCK_auto_inc YES YES
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wait/synch/mutex/sql/LOCK_active_mi YES YES
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wait/synch/mutex/sql/LOCK_after_binlog_sync YES YES
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wait/synch/mutex/sql/LOCK_audit_mask YES YES
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select * from performance_schema.setup_instruments
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where name like 'Wait/Synch/Rwlock/sql/%'
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and name not in (
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'wait/synch/rwlock/sql/CRYPTO_dynlock_value::lock',
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'wait/synch/rwlock/sql/LOCK_named_pipe_full_access_group')
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order by name limit 10;
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NAME ENABLED TIMED
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wait/synch/rwlock/sql/LOCK_all_status_vars YES YES
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wait/synch/rwlock/sql/LOCK_dbnames YES YES
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wait/synch/rwlock/sql/LOCK_dboptions YES YES
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wait/synch/rwlock/sql/LOCK_grant YES YES
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wait/synch/rwlock/sql/LOCK_rmdir YES YES
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wait/synch/rwlock/sql/LOCK_SEQUENCE YES YES
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wait/synch/rwlock/sql/LOCK_ssl_refresh YES YES
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wait/synch/rwlock/sql/LOCK_system_variables_hash YES YES
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wait/synch/rwlock/sql/LOCK_sys_init_connect YES YES
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wait/synch/rwlock/sql/LOCK_sys_init_slave YES YES
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select * from performance_schema.setup_instruments
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where name like 'Wait/Synch/Cond/sql/%'
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and name not in (
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'wait/synch/cond/sql/COND_open',
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'wait/synch/cond/sql/COND_handler_count',
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'wait/synch/cond/sql/DEBUG_SYNC::cond',
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'wait/synch/cond/sql/COND_socket_listener_active',
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'wait/synch/cond/sql/COND_start_signal_handler')
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order by name limit 10;
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NAME ENABLED TIMED
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wait/synch/cond/sql/Ack_receiver::cond YES YES
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wait/synch/cond/sql/COND_binlog_send YES YES
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wait/synch/cond/sql/COND_flush_thread_cache YES YES
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wait/synch/cond/sql/COND_group_commit_orderer YES YES
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wait/synch/cond/sql/COND_gtid_ignore_duplicates YES YES
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wait/synch/cond/sql/COND_manager YES YES
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wait/synch/cond/sql/COND_parallel_entry YES YES
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wait/synch/cond/sql/COND_prepare_ordered YES YES
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wait/synch/cond/sql/COND_queue_state YES YES
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wait/synch/cond/sql/COND_rpl_thread YES YES
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select * from performance_schema.setup_instruments
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where name='Wait';
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select * from performance_schema.setup_instruments
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where enabled='YES';
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insert into performance_schema.setup_instruments
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set name='FOO', enabled='YES', timed='YES';
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ERROR 42000: INSERT command denied to user 'root'@'localhost' for table 'setup_instruments'
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update performance_schema.setup_instruments
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set name='FOO';
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ERROR HY000: Invalid performance_schema usage
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update performance_schema.setup_instruments
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set enabled='NO';
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update performance_schema.setup_instruments
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set timed='NO';
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select * from performance_schema.setup_instruments;
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update performance_schema.setup_instruments
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set enabled='YES', timed='YES';
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delete from performance_schema.setup_instruments;
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ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'setup_instruments'
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delete from performance_schema.setup_instruments
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where name like 'Wait/Synch/%';
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ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'setup_instruments'
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LOCK TABLES performance_schema.setup_instruments READ;
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UNLOCK TABLES;
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LOCK TABLES performance_schema.setup_instruments WRITE;
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UNLOCK TABLES;
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#
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# Bug#13813193 ASSERTION `TABLE->READ_SET ==
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# &TABLE->DEF_READ_SET' FAILED / MYSQL_UPDATE
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#
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UPDATE performance_schema.setup_instruments SET timed='NO'
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ORDER BY RAND();
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update performance_schema.setup_instruments
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set enabled='YES', TIMED='YES';
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