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4e1678daca
Before this fix, the performance schema tables were defined in UPPERCASE. This was incompatible with the lowercase_table_names option, and caused issues with the install / upgrade process, when changing the lower case table names setting *after* the install or upgrade. With this fix, all performance schema tables are exposed with lowercase names. As a result, the name of the performance schema table is always lowercase, no matter how / if / when the lowercase_table_names setting if changed.
74 lines
2.6 KiB
Plaintext
74 lines
2.6 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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1
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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 10000
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performance_schema_events_waits_history_size 10
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performance_schema_max_cond_classes 80
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performance_schema_max_cond_instances 1000
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performance_schema_max_file_classes 0
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performance_schema_max_file_handles 32768
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performance_schema_max_file_instances 10000
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performance_schema_max_mutex_classes 200
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performance_schema_max_mutex_instances 10000
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performance_schema_max_rwlock_classes 30
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performance_schema_max_rwlock_instances 10000
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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 50
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performance_schema_max_thread_instances 1000
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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_max_file_classes";
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Variable_name Value
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performance_schema_max_file_classes 0
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select count(*) from performance_schema.setup_instruments
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where name like "wait/io/file/%";
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count(*)
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0
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select variable_value > 0 from information_schema.global_status
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where variable_name like 'PERFORMANCE_SCHEMA_FILE_CLASSES_LOST';
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variable_value > 0
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1
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select count(*) from performance_schema.file_instances;
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count(*)
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0
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show status like "performance_schema_file_instances_lost";
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Variable_name Value
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Performance_schema_file_instances_lost 0
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