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1f51d6c0f6
- Added missing information about database of corresponding table for various types of commands - Update some typos - Reviewed by: <vicentiu@mariadb.org>
71 lines
4.6 KiB
Text
71 lines
4.6 KiB
Text
select * from performance_schema.table_io_waits_summary_by_table
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limit 1;
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select * from performance_schema.table_io_waits_summary_by_table
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where object_name='FOO';
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insert into performance_schema.table_io_waits_summary_by_table
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set object_type='TABLE', object_name='FOO', object_schema='BAR',
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count_star=1, sum_timer_wait=2, min_timer_wait=3,
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avg_timer_wait=4, max_timer_wait=5;
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ERROR 42000: INSERT command denied to user 'root'@'localhost' for table `performance_schema`.`table_io_waits_summary_by_table`
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update performance_schema.table_io_waits_summary_by_table
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set count_star=12;
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ERROR 42000: UPDATE command denied to user 'root'@'localhost' for table `performance_schema`.`table_io_waits_summary_by_table`
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update performance_schema.table_io_waits_summary_by_table
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set count_star=12 where object_name like "FOO";
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ERROR 42000: UPDATE command denied to user 'root'@'localhost' for table `performance_schema`.`table_io_waits_summary_by_table`
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delete from performance_schema.table_io_waits_summary_by_table
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where count_star=1;
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ERROR 42000: DELETE command denied to user 'root'@'localhost' for table `performance_schema`.`table_io_waits_summary_by_table`
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delete from performance_schema.table_io_waits_summary_by_table;
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ERROR 42000: DELETE command denied to user 'root'@'localhost' for table `performance_schema`.`table_io_waits_summary_by_table`
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LOCK TABLES performance_schema.table_io_waits_summary_by_table READ;
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ERROR 42000: SELECT, LOCK TABLES command denied to user 'root'@'localhost' for table `performance_schema`.`table_io_waits_summary_by_table`
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UNLOCK TABLES;
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LOCK TABLES performance_schema.table_io_waits_summary_by_table WRITE;
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ERROR 42000: SELECT, LOCK TABLES command denied to user 'root'@'localhost' for table `performance_schema`.`table_io_waits_summary_by_table`
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UNLOCK TABLES;
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#
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# MDEV-25325 column_comment for performance_schema tables
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#
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select column_name, column_comment
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from information_schema.columns
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where table_schema='performance_schema' and table_name='table_io_waits_summary_by_table';
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column_name column_comment
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OBJECT_TYPE Since this table records waits by table, always set to TABLE.
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OBJECT_SCHEMA Schema name.
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OBJECT_NAME Table name.
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COUNT_STAR Number of summarized events and the sum of the x_READ and x_WRITE columns.
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SUM_TIMER_WAIT Total wait time of the summarized events that are timed.
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MIN_TIMER_WAIT Minimum wait time of the summarized events that are timed.
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AVG_TIMER_WAIT Average wait time of the summarized events that are timed.
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MAX_TIMER_WAIT Maximum wait time of the summarized events that are timed.
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COUNT_READ Number of all read operations, and the sum of the equivalent x_FETCH columns.
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SUM_TIMER_READ Total wait time of all read operations that are timed.
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MIN_TIMER_READ Minimum wait time of all read operations that are timed.
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AVG_TIMER_READ Average wait time of all read operations that are timed.
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MAX_TIMER_READ Maximum wait time of all read operations that are timed.
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COUNT_WRITE Number of all write operations, and the sum of the equivalent x_INSERT, x_UPDATE and x_DELETE columns.
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SUM_TIMER_WRITE Total wait time of all write operations that are timed.
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MIN_TIMER_WRITE Minimum wait time of all write operations that are timed.
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AVG_TIMER_WRITE Average wait time of all write operations that are timed.
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MAX_TIMER_WRITE Maximum wait time of all write operations that are timed.
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COUNT_FETCH Number of all fetch operations.
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SUM_TIMER_FETCH Total wait time of all fetch operations that are timed.
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MIN_TIMER_FETCH Minimum wait time of all fetch operations that are timed.
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AVG_TIMER_FETCH Average wait time of all fetch operations that are timed.
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MAX_TIMER_FETCH Maximum wait time of all fetch operations that are timed.
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COUNT_INSERT Number of all insert operations.
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SUM_TIMER_INSERT Total wait time of all insert operations that are timed.
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MIN_TIMER_INSERT Minimum wait time of all insert operations that are timed.
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AVG_TIMER_INSERT Average wait time of all insert operations that are timed.
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MAX_TIMER_INSERT Maximum wait time of all insert operations that are timed.
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COUNT_UPDATE Number of all update operations.
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SUM_TIMER_UPDATE Total wait time of all update operations that are timed.
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MIN_TIMER_UPDATE Minimum wait time of all update operations that are timed.
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AVG_TIMER_UPDATE Average wait time of all update operations that are timed.
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MAX_TIMER_UPDATE Maximum wait time of all update operations that are timed.
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COUNT_DELETE Number of all delete operations.
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SUM_TIMER_DELETE Total wait time of all delete operations that are timed.
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MIN_TIMER_DELETE Minimum wait time of all delete operations that are timed.
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AVG_TIMER_DELETE Average wait time of all delete operations that are timed.
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MAX_TIMER_DELETE Maximum wait time of all delete operations that are timed.
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