mysql 各類鎖查看方法

-- 查看當前所有事務
select * from information_schema.innodb_trx;
-- 查看正在鎖的事務
select * from information_schema.innodb_locks;
-- 查看等待鎖的事務
select * from information_schema.innodb_lock_waits;
-- 查看表鎖
show open tables where In_use>0;
--查看死鎖
show engine innodb status\G
--查看元數據鎖
SELECT * FROM performance_schema.setup_instruments;
UPDATE performance_schema.setup_consumers SET ENABLED = 'YES' WHERE NAME ='global_instrumentation';
UPDATE performance_schema.setup_instruments SET ENABLED = 'YES' WHERE NAME ='wait/lock/metadata/sql/mdl';
SELECT * FROM performance_schema.metadata_locks;