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cc2df0069d
Before this fix, configuring the server with: - performance_schema_events_waits_history_size=0 - performance_schema_events_waits_history_long_size=0 could cause a crash in the performance schema. These settings to 0 are intended to be valid and supported, and are in fact working properly in mysql 5.6 and up already. This fix backports the code fix and test cases from mysql 5.6 to the mysql 5.5 release.
123 lines
5.2 KiB
Plaintext
123 lines
5.2 KiB
Plaintext
show databases;
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Database
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information_schema
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mtr
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mysql
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performance_schema
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test
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select count(*) from performance_schema.performance_timers;
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count(*)
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5
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select count(*) from performance_schema.setup_consumers;
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count(*)
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8
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select count(*) > 0 from performance_schema.setup_instruments;
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count(*) > 0
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0
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select count(*) from performance_schema.setup_timers;
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count(*)
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1
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select * from performance_schema.cond_instances;
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select * from performance_schema.events_waits_current;
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select * from performance_schema.events_waits_history;
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select * from performance_schema.events_waits_history_long;
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select * from performance_schema.events_waits_summary_by_instance;
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select * from performance_schema.events_waits_summary_by_thread_by_event_name;
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select * from performance_schema.events_waits_summary_global_by_event_name;
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select * from performance_schema.file_instances;
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select * from performance_schema.file_summary_by_event_name;
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select * from performance_schema.file_summary_by_instance;
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select * from performance_schema.mutex_instances;
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select * from performance_schema.performance_timers;
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select * from performance_schema.rwlock_instances;
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select * from performance_schema.setup_consumers;
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select * from performance_schema.setup_instruments;
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select * from performance_schema.setup_timers;
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select * from performance_schema.threads;
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show variables like "performance_schema%";
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Variable_name Value
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performance_schema ON
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performance_schema_events_waits_history_long_size 0
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performance_schema_events_waits_history_size 0
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performance_schema_max_cond_classes 0
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performance_schema_max_cond_instances 0
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performance_schema_max_file_classes 0
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performance_schema_max_file_handles 0
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performance_schema_max_file_instances 0
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performance_schema_max_mutex_classes 0
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performance_schema_max_mutex_instances 0
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performance_schema_max_rwlock_classes 0
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performance_schema_max_rwlock_instances 0
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performance_schema_max_table_handles 1000
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performance_schema_max_table_instances 500
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performance_schema_max_thread_classes 0
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performance_schema_max_thread_instances 0
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show engine PERFORMANCE_SCHEMA status;
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show status like "performance_schema%";
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show variables like "performance_schema%";
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Variable_name Value
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performance_schema ON
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performance_schema_events_waits_history_long_size 0
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performance_schema_events_waits_history_size 0
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performance_schema_max_cond_classes 0
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performance_schema_max_cond_instances 0
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performance_schema_max_file_classes 0
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performance_schema_max_file_handles 0
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performance_schema_max_file_instances 0
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performance_schema_max_mutex_classes 0
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performance_schema_max_mutex_instances 0
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performance_schema_max_rwlock_classes 0
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performance_schema_max_rwlock_instances 0
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performance_schema_max_table_handles 1000
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performance_schema_max_table_instances 500
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performance_schema_max_thread_classes 0
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performance_schema_max_thread_instances 0
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select * from performance_schema.setup_instruments;
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NAME ENABLED TIMED
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select TIMER_NAME from performance_schema.performance_timers;
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TIMER_NAME
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CYCLE
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NANOSECOND
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MICROSECOND
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MILLISECOND
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TICK
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select * from performance_schema.setup_consumers;
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NAME ENABLED
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events_waits_current YES
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events_waits_history YES
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events_waits_history_long YES
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events_waits_summary_by_thread_by_event_name YES
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events_waits_summary_by_event_name YES
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events_waits_summary_by_instance YES
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file_summary_by_event_name YES
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file_summary_by_instance YES
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select NAME from performance_schema.setup_timers;
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NAME
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wait
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select * from performance_schema.cond_instances;
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NAME OBJECT_INSTANCE_BEGIN
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select * from performance_schema.events_waits_current;
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THREAD_ID EVENT_ID EVENT_NAME SOURCE TIMER_START TIMER_END TIMER_WAIT SPINS OBJECT_SCHEMA OBJECT_NAME OBJECT_TYPE OBJECT_INSTANCE_BEGIN NESTING_EVENT_ID OPERATION NUMBER_OF_BYTES FLAGS
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select * from performance_schema.events_waits_history;
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THREAD_ID EVENT_ID EVENT_NAME SOURCE TIMER_START TIMER_END TIMER_WAIT SPINS OBJECT_SCHEMA OBJECT_NAME OBJECT_TYPE OBJECT_INSTANCE_BEGIN NESTING_EVENT_ID OPERATION NUMBER_OF_BYTES FLAGS
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select * from performance_schema.events_waits_history_long;
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THREAD_ID EVENT_ID EVENT_NAME SOURCE TIMER_START TIMER_END TIMER_WAIT SPINS OBJECT_SCHEMA OBJECT_NAME OBJECT_TYPE OBJECT_INSTANCE_BEGIN NESTING_EVENT_ID OPERATION NUMBER_OF_BYTES FLAGS
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select * from performance_schema.events_waits_summary_by_instance;
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EVENT_NAME OBJECT_INSTANCE_BEGIN COUNT_STAR SUM_TIMER_WAIT MIN_TIMER_WAIT AVG_TIMER_WAIT MAX_TIMER_WAIT
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select * from performance_schema.events_waits_summary_by_thread_by_event_name;
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THREAD_ID EVENT_NAME COUNT_STAR SUM_TIMER_WAIT MIN_TIMER_WAIT AVG_TIMER_WAIT MAX_TIMER_WAIT
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select * from performance_schema.events_waits_summary_global_by_event_name;
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EVENT_NAME COUNT_STAR SUM_TIMER_WAIT MIN_TIMER_WAIT AVG_TIMER_WAIT MAX_TIMER_WAIT
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select * from performance_schema.file_instances;
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FILE_NAME EVENT_NAME OPEN_COUNT
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select * from performance_schema.file_summary_by_event_name;
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EVENT_NAME COUNT_READ COUNT_WRITE SUM_NUMBER_OF_BYTES_READ SUM_NUMBER_OF_BYTES_WRITE
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select * from performance_schema.file_summary_by_instance;
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FILE_NAME EVENT_NAME COUNT_READ COUNT_WRITE SUM_NUMBER_OF_BYTES_READ SUM_NUMBER_OF_BYTES_WRITE
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select * from performance_schema.mutex_instances;
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NAME OBJECT_INSTANCE_BEGIN LOCKED_BY_THREAD_ID
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select * from performance_schema.rwlock_instances;
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NAME OBJECT_INSTANCE_BEGIN WRITE_LOCKED_BY_THREAD_ID READ_LOCKED_BY_COUNT
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select * from performance_schema.threads;
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THREAD_ID PROCESSLIST_ID NAME
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