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775cba4d0f
- FLUSH GLOBAL STATUS now resets most global_status_vars.
At this stage, this is mainly to be used for testing.
- FLUSH SESSION STATUS added as an alias for FLUSH STATUS.
- FLUSH STATUS does not require any privilege (before required RELOAD).
- FLUSH GLOBAL STATUS requires RELOAD privilege.
- All global status reset moved to FLUSH GLOBAL STATUS.
- Replication semisync status variables are now reset by
FLUSH GLOBAL STATUS.
- In test cases, the only changes are:
- Replace FLUSH STATUS with FLUSH GLOBAL STATUS
- Replace FLUSH STATUS with FLUSH STATUS; FLUSH GLOBAL STATUS.
This was only done in a few tests where the test was using SHOW STATUS
for both local and global variables.
- Uptime_since_flush_status is now always provided, independent if
ENABLED_PROFILING is enabled when compiling MariaDB.
- @@global.Uptime_since_flush_status is reset on FLUSH GLOBAL STATUS
and @@session.Uptime_since_flush_status is reset on FLUSH SESSION STATUS.
- When connected, @@session.Uptime_since_flush_status is set to 0.
164 lines
6.6 KiB
Text
164 lines
6.6 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/io/file/%';
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update performance_schema.threads SET instrumented = 'YES'
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WHERE PROCESSLIST_ID=connection_id();
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truncate table performance_schema.events_statements_summary_by_digest;
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flush global status;
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DROP TABLE IF EXISTS t1;
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CREATE TABLE t1 (id INT PRIMARY KEY, b CHAR(100) DEFAULT 'initial value')
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ENGINE=MyISAM;
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INSERT INTO t1 (id) VALUES (1), (2), (3), (4), (5), (6), (7), (8);
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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 * FROM t1 WHERE id = 1;
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id b
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1 initial value
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SET @before_count = (SELECT SUM(TIMER_WAIT)
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FROM performance_schema.events_waits_history_long
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WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile')
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AND (OBJECT_NAME LIKE '%t1.MYD'));
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SELECT (@before_count >= 0) as have_before_count;
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have_before_count
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1
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SELECT IF(@before_count > 0, 'Success', 'Failure') has_instrumentation;
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has_instrumentation
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Success
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SELECT * FROM t1 WHERE id < 4;
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id b
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1 initial value
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2 initial value
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3 initial value
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SET @after_count = (SELECT SUM(TIMER_WAIT)
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FROM performance_schema.events_waits_history_long
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WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile')
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AND (OBJECT_NAME LIKE '%t1.MYD') AND (1 = 1));
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SELECT (@after_count >= 0) as have_after_count;
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have_after_count
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1
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SELECT IF((@after_count - @before_count) > 0, 'Success', 'Failure') test_ff1_timed;
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test_ff1_timed
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Success
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UPDATE performance_schema.setup_instruments SET enabled='NO';
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SET @before_count = (SELECT SUM(TIMER_WAIT)
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FROM performance_schema.events_waits_history_long
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WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile')
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AND (OBJECT_NAME LIKE '%t1.MYD') AND (2 = 2));
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SELECT (@before_count >= 0) as have_before_count;
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have_before_count
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1
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SELECT * FROM t1 WHERE id < 6;
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id b
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1 initial value
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2 initial value
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3 initial value
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4 initial value
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5 initial value
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SET @after_count = (SELECT SUM(TIMER_WAIT)
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FROM performance_schema.events_waits_history_long
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WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile')
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AND (OBJECT_NAME LIKE '%t1.MYD') AND (3 = 3));
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SELECT (@after_count >= 0) as have_after_count;
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have_after_count
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1
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SELECT IF((COALESCE(@after_count, 0) - COALESCE(@before_count, 0)) = 0, 'Success', 'Failure') test_ff2_timed;
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test_ff2_timed
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Success
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UPDATE performance_schema.setup_instruments SET enabled = 'YES'
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WHERE name LIKE 'wait/io/file/%';
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UPDATE performance_schema.setup_instruments SET timed = 'NO';
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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 * FROM t1 WHERE id > 4;
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id b
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5 initial value
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6 initial value
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7 initial value
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8 initial value
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SELECT * FROM performance_schema.events_waits_history_long
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WHERE TIMER_WAIT != NULL
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OR TIMER_START != NULL
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OR TIMER_END != NULL;
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THREAD_ID EVENT_ID END_EVENT_ID EVENT_NAME SOURCE TIMER_START TIMER_END TIMER_WAIT SPINS OBJECT_SCHEMA OBJECT_NAME INDEX_NAME OBJECT_TYPE OBJECT_INSTANCE_BEGIN NESTING_EVENT_ID NESTING_EVENT_TYPE OPERATION NUMBER_OF_BYTES FLAGS
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SELECT * FROM performance_schema.events_waits_history
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WHERE TIMER_WAIT != NULL
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OR TIMER_START != NULL
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OR TIMER_END != NULL;
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THREAD_ID EVENT_ID END_EVENT_ID EVENT_NAME SOURCE TIMER_START TIMER_END TIMER_WAIT SPINS OBJECT_SCHEMA OBJECT_NAME INDEX_NAME OBJECT_TYPE OBJECT_INSTANCE_BEGIN NESTING_EVENT_ID NESTING_EVENT_TYPE OPERATION NUMBER_OF_BYTES FLAGS
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SELECT * FROM performance_schema.events_waits_current
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WHERE TIMER_WAIT != NULL
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OR TIMER_START != NULL
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OR TIMER_END != NULL;
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THREAD_ID EVENT_ID END_EVENT_ID EVENT_NAME SOURCE TIMER_START TIMER_END TIMER_WAIT SPINS OBJECT_SCHEMA OBJECT_NAME INDEX_NAME OBJECT_TYPE OBJECT_INSTANCE_BEGIN NESTING_EVENT_ID NESTING_EVENT_TYPE OPERATION NUMBER_OF_BYTES FLAGS
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UPDATE performance_schema.setup_instruments SET timed = 'YES';
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SELECT * FROM t1 WHERE id < 4;
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id b
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1 initial value
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2 initial value
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3 initial value
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DROP TABLE t1;
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SELECT SUM(COUNT_READ) AS sum_count_read,
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SUM(COUNT_WRITE) AS sum_count_write,
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SUM(SUM_NUMBER_OF_BYTES_READ) AS sum_num_bytes_read,
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SUM(SUM_NUMBER_OF_BYTES_WRITE) AS sum_num_bytes_write
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FROM performance_schema.file_summary_by_instance
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WHERE FILE_NAME LIKE CONCAT('%', @@tmpdir, '%') ORDER BY NULL;
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SELECT EVENT_NAME, COUNT_STAR, AVG_TIMER_WAIT, SUM_TIMER_WAIT
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FROM performance_schema.events_waits_summary_global_by_event_name
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WHERE COUNT_STAR > 0
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ORDER BY SUM_TIMER_WAIT DESC
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LIMIT 10;
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SELECT p.processlist_user, SUM(TIMER_WAIT) SUM_WAIT
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# ((TIME_TO_SEC(TIMEDIFF(NOW(), i.startup_time)) * 1000) / SUM(TIMER_WAIT)) * 100 WAIT_PERCENTAGE
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FROM performance_schema.events_waits_history_long h
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INNER JOIN performance_schema.threads p USING (THREAD_ID)
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GROUP BY p.processlist_user
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ORDER BY SUM_WAIT DESC
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LIMIT 20;
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SELECT h.EVENT_NAME, SUM(h.TIMER_WAIT) TOTAL_WAIT
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FROM performance_schema.events_waits_history_long h
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INNER JOIN performance_schema.threads p USING (THREAD_ID)
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WHERE p.PROCESSLIST_ID = 1
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GROUP BY h.EVENT_NAME
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HAVING TOTAL_WAIT > 0;
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SELECT p.processlist_user, h.operation, SUM(NUMBER_OF_BYTES) bytes
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FROM performance_schema.events_waits_history_long h
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INNER JOIN performance_schema.threads p USING (THREAD_ID)
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GROUP BY p.processlist_user, h.operation
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HAVING BYTES > 0
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ORDER BY p.processlist_user, h.operation;
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UPDATE performance_schema.setup_instruments SET enabled = 'YES', timed = 'YES';
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show global status like "performance_schema%";
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Variable_name Value
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Performance_schema_accounts_lost 0
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Performance_schema_cond_classes_lost 0
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Performance_schema_cond_instances_lost 0
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Performance_schema_digest_lost 0
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Performance_schema_file_classes_lost 0
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Performance_schema_file_handles_lost 0
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Performance_schema_file_instances_lost 0
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Performance_schema_hosts_lost 0
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Performance_schema_index_stat_lost 0
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Performance_schema_locker_lost 0
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Performance_schema_memory_classes_lost 0
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Performance_schema_metadata_lock_lost 0
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Performance_schema_mutex_classes_lost 0
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Performance_schema_mutex_instances_lost 0
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Performance_schema_nested_statement_lost 0
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Performance_schema_prepared_statements_lost 0
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Performance_schema_program_lost 0
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Performance_schema_rwlock_classes_lost 0
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Performance_schema_rwlock_instances_lost 0
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Performance_schema_session_connect_attrs_lost 0
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Performance_schema_socket_classes_lost 0
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Performance_schema_socket_instances_lost 0
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Performance_schema_stage_classes_lost 0
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Performance_schema_statement_classes_lost 0
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Performance_schema_table_handles_lost 0
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Performance_schema_table_instances_lost 0
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Performance_schema_table_lock_stat_lost 0
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Performance_schema_thread_classes_lost 0
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Performance_schema_thread_instances_lost 0
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Performance_schema_users_lost 0
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