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show databases;
Database
information_schema
mtr
mysql
performance_schema
sys
test
select count(*) from performance_schema.performance_timers;
count(*)
5
select count(*) from performance_schema.setup_consumers;
count(*)
15
select count(*) > 4 from performance_schema.setup_instruments;
count(*) > 4
1
select count(*) from performance_schema.setup_timers;
count(*)
5
Warnings:
Warning 1681 'performance_schema.setup_timers' is deprecated and will be removed in a future release
select * from performance_schema.accounts;
select * from performance_schema.cond_instances;
select * from performance_schema.events_stages_current;
select * from performance_schema.events_stages_history;
select * from performance_schema.events_stages_history_long;
select * from performance_schema.events_stages_summary_by_account_by_event_name;
select * from performance_schema.events_stages_summary_by_host_by_event_name;
select * from performance_schema.events_stages_summary_by_thread_by_event_name;
select * from performance_schema.events_stages_summary_by_user_by_event_name;
select * from performance_schema.events_stages_summary_global_by_event_name;
select * from performance_schema.events_statements_current;
select * from performance_schema.events_statements_history;
select * from performance_schema.events_statements_history_long;
select * from performance_schema.events_statements_summary_by_account_by_event_name;
select * from performance_schema.events_statements_summary_by_digest;
select * from performance_schema.events_statements_summary_by_host_by_event_name;
select * from performance_schema.events_statements_summary_by_thread_by_event_name;
select * from performance_schema.events_statements_summary_by_user_by_event_name;
select * from performance_schema.events_statements_summary_global_by_event_name;
select * from performance_schema.events_transactions_current;
select * from performance_schema.events_transactions_history;
select * from performance_schema.events_transactions_history_long;
select * from performance_schema.events_transactions_summary_by_account_by_event_name;
select * from performance_schema.events_transactions_summary_by_host_by_event_name;
select * from performance_schema.events_transactions_summary_by_thread_by_event_name;
select * from performance_schema.events_transactions_summary_by_user_by_event_name;
select * from performance_schema.events_transactions_summary_global_by_event_name;
select * from performance_schema.events_waits_current;
select * from performance_schema.events_waits_history;
select * from performance_schema.events_waits_history_long;
select * from performance_schema.events_waits_summary_by_account_by_event_name;
select * from performance_schema.events_waits_summary_by_host_by_event_name;
select * from performance_schema.events_waits_summary_by_instance;
select * from performance_schema.events_waits_summary_by_thread_by_event_name;
select * from performance_schema.events_waits_summary_by_user_by_event_name;
select * from performance_schema.events_waits_summary_global_by_event_name;
select * from performance_schema.memory_summary_by_account_by_event_name;
select * from performance_schema.memory_summary_by_host_by_event_name;
select * from performance_schema.memory_summary_by_thread_by_event_name;
select * from performance_schema.memory_summary_by_user_by_event_name;
select * from performance_schema.memory_summary_global_by_event_name;
select * from performance_schema.file_instances;
select * from performance_schema.file_summary_by_event_name;
select * from performance_schema.file_summary_by_instance;
select * from performance_schema.host_cache;
select * from performance_schema.hosts;
select * from performance_schema.memory_summary_by_account_by_event_name;
select * from performance_schema.memory_summary_by_host_by_event_name;
select * from performance_schema.memory_summary_by_thread_by_event_name;
select * from performance_schema.memory_summary_by_user_by_event_name;
select * from performance_schema.memory_summary_global_by_event_name;
select * from performance_schema.metadata_locks;
select * from performance_schema.mutex_instances;
select * from performance_schema.objects_summary_global_by_type;
select * from performance_schema.performance_timers;
select * from performance_schema.rwlock_instances;
select * from performance_schema.session_account_connect_attrs;
select * from performance_schema.session_connect_attrs;
select * from performance_schema.setup_actors;
select * from performance_schema.setup_consumers;
select * from performance_schema.setup_instruments;
select * from performance_schema.setup_objects;
select * from performance_schema.setup_timers;
select * from performance_schema.socket_instances;
select * from performance_schema.socket_summary_by_instance;
select * from performance_schema.socket_summary_by_event_name;
select * from performance_schema.table_handles;
select * from performance_schema.table_io_waits_summary_by_index_usage;
select * from performance_schema.table_io_waits_summary_by_table;
select * from performance_schema.table_lock_waits_summary_by_table;
select * from performance_schema.threads;
select * from performance_schema.users;
select * from performance_schema.replication_connection_configuration;
select * from performance_schema.replication_applier_configuration;
select * from performance_schema.replication_applier_status;
select * from performance_schema.replication_applier_status_by_coordinator;
select * from performance_schema.global_status;
select * from performance_schema.status_by_thread;
select * from performance_schema.status_by_user;
select * from performance_schema.status_by_host;
select * from performance_schema.status_by_account;
select * from performance_schema.session_status;
show global variables like "performance_schema%";
Variable_name Value
performance_schema ON
performance_schema_accounts_size 100
performance_schema_digests_size 200
performance_schema_events_stages_history_long_size 1000
performance_schema_events_stages_history_size 10
performance_schema_events_statements_history_long_size 1000
performance_schema_events_statements_history_size 10
performance_schema_events_transactions_history_long_size 1000
performance_schema_events_transactions_history_size 10
performance_schema_events_waits_history_long_size 10000
performance_schema_events_waits_history_size 10
performance_schema_hosts_size 100
performance_schema_max_cond_classes 90
performance_schema_max_cond_instances 1000
performance_schema_max_digest_length 1024
performance_schema_max_file_classes 80
performance_schema_max_file_handles 32768
performance_schema_max_file_instances 10000
performance_schema_max_index_stat 34
performance_schema_max_memory_classes 320
performance_schema_max_metadata_locks 10000
performance_schema_max_mutex_classes 210
performance_schema_max_mutex_instances 5000
performance_schema_max_prepared_statements_instances 100
performance_schema_max_program_instances 5000
performance_schema_max_rwlock_classes 50
performance_schema_max_rwlock_instances 5000
performance_schema_max_socket_classes 10
performance_schema_max_socket_instances 1000
performance_schema_max_sql_text_length 1024
performance_schema_max_stage_classes 160
performance_schema_max_statement_classes 222
performance_schema_max_statement_stack 10
performance_schema_max_table_handles 1000
performance_schema_max_table_instances 500
performance_schema_max_table_lock_stat 500
performance_schema_max_thread_classes 50
performance_schema_max_thread_instances 200
performance_schema_session_connect_attrs_size 2048
performance_schema_setup_actors_size 100
performance_schema_setup_objects_size 100
performance_schema_users_size 100
show engine PERFORMANCE_SCHEMA status;
show global status like "performance_schema%";
drop table if exists db1.t1;
drop database if exists db1;
create database db1;
create table db1.t1 (a int, b char(10) default 'default',
unique key uidx(a));
insert into db1.t1 values('1', 'abc');
insert into db1.t1 values('2', 'abc');
select * from db1.t1 where a='1';
a b
1 abc
select COUNT_STAR, OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME
from performance_schema.table_io_waits_summary_by_table
where OBJECT_SCHEMA='db1'
order by OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME;
COUNT_STAR OBJECT_TYPE OBJECT_SCHEMA OBJECT_NAME
3 TABLE db1 t1
select COUNT_STAR, OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, INDEX_NAME
from performance_schema.table_io_waits_summary_by_index_usage
where OBJECT_SCHEMA='db1'
order by OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, INDEX_NAME;
COUNT_STAR OBJECT_TYPE OBJECT_SCHEMA OBJECT_NAME INDEX_NAME
2 TABLE db1 t1 NULL
1 TABLE db1 t1 uidx
flush tables;
select COUNT_STAR, OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME
from performance_schema.table_io_waits_summary_by_table
where OBJECT_SCHEMA='db1'
order by OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME;
COUNT_STAR OBJECT_TYPE OBJECT_SCHEMA OBJECT_NAME
1 TABLE db1 t1
select COUNT_STAR, OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, INDEX_NAME
from performance_schema.table_io_waits_summary_by_index_usage
where OBJECT_SCHEMA='db1'
order by OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, INDEX_NAME;
COUNT_STAR OBJECT_TYPE OBJECT_SCHEMA OBJECT_NAME INDEX_NAME
1 TABLE db1 t1 uidx
select variable_value > 0 from information_schema.global_status
where variable_name like 'PERFORMANCE_SCHEMA_INDEX_STAT_LOST';
variable_value > 0
1
FLUSH STATUS;
select variable_value from information_schema.global_status
where variable_name like 'PERFORMANCE_SCHEMA_INDEX_STAT_LOST';
variable_value
0
create table db1.t2 (a int, b char(10) default 'default',
unique key uidx(a));
insert into db1.t1 values('3', 'abc');
insert into db1.t1 values('4', 'abc');
select * from db1.t1 where a='1';
a b
1 abc
insert into db1.t2 values('1', 'abc');
insert into db1.t2 values('2', 'abc');
select * from db1.t2 where a='1';
a b
1 abc
select COUNT_STAR, OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME
from performance_schema.table_io_waits_summary_by_table
where OBJECT_SCHEMA='db1'
order by OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME;
COUNT_STAR OBJECT_TYPE OBJECT_SCHEMA OBJECT_NAME
4 TABLE db1 t1
3 TABLE db1 t2
select COUNT_STAR, OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, INDEX_NAME
from performance_schema.table_io_waits_summary_by_index_usage
where OBJECT_SCHEMA='db1'
order by OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, INDEX_NAME;
COUNT_STAR OBJECT_TYPE OBJECT_SCHEMA OBJECT_NAME INDEX_NAME
2 TABLE db1 t1 NULL
2 TABLE db1 t1 uidx
2 TABLE db1 t2 NULL
1 TABLE db1 t2 (index 0)
flush tables;
select COUNT_STAR, OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME
from performance_schema.table_io_waits_summary_by_table
where OBJECT_SCHEMA='db1'
order by OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME;
COUNT_STAR OBJECT_TYPE OBJECT_SCHEMA OBJECT_NAME
2 TABLE db1 t1
0 TABLE db1 t2
select COUNT_STAR, OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, INDEX_NAME
from performance_schema.table_io_waits_summary_by_index_usage
where OBJECT_SCHEMA='db1'
order by OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, INDEX_NAME;
COUNT_STAR OBJECT_TYPE OBJECT_SCHEMA OBJECT_NAME INDEX_NAME
2 TABLE db1 t1 uidx
select variable_value > 0 from information_schema.global_status
where variable_name like 'PERFORMANCE_SCHEMA_INDEX_STAT_LOST';
variable_value > 0
1
FLUSH STATUS;
update performance_schema.setup_objects set ENABLED='NO' where OBJECT_TYPE='TABLE';
insert into db1.t1 values('5', 'abc');
insert into db1.t1 values('6', 'abc');
select * from db1.t1 where a='1';
a b
1 abc
insert into db1.t2 values('3', 'abc');
insert into db1.t2 values('4', 'abc');
select * from db1.t2 where a='1';
a b
1 abc
select COUNT_STAR, OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME
from performance_schema.table_io_waits_summary_by_table
where OBJECT_SCHEMA='db1'
order by OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME;
COUNT_STAR OBJECT_TYPE OBJECT_SCHEMA OBJECT_NAME
select COUNT_STAR, OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, INDEX_NAME
from performance_schema.table_io_waits_summary_by_index_usage
where OBJECT_SCHEMA='db1'
order by OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, INDEX_NAME;
COUNT_STAR OBJECT_TYPE OBJECT_SCHEMA OBJECT_NAME INDEX_NAME
flush tables;
select COUNT_STAR, OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME
from performance_schema.table_io_waits_summary_by_table
where OBJECT_SCHEMA='db1'
order by OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME;
COUNT_STAR OBJECT_TYPE OBJECT_SCHEMA OBJECT_NAME
select COUNT_STAR, OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, INDEX_NAME
from performance_schema.table_io_waits_summary_by_index_usage
where OBJECT_SCHEMA='db1'
order by OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, INDEX_NAME;
COUNT_STAR OBJECT_TYPE OBJECT_SCHEMA OBJECT_NAME INDEX_NAME
select variable_value from information_schema.global_status
where variable_name like 'PERFORMANCE_SCHEMA_INDEX_STAT_LOST';
variable_value
0
drop database db1;
update performance_schema.setup_objects set ENABLED='YES'
where OBJECT_TYPE='TABLE' and OBJECT_SCHEMA="%";
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