本文介绍了一种通过SQL查询来获取InnoDB引擎中锁等待情况的方法，包括阻塞线程ID、锁定表、锁定类型等信息，并展示了如何计算等待时间。
select IFNULL(wt.trx_mysql_thread_id,1) BLOCKING_THREAD_ID,
t.trx_mysql_thread_id THREAD_ID,
CONCAT(p.user,'@',p.host) USER,
l.lock_table LOCK_TABLE,
l.lock_index LOCKED_INDEX,
l.lock_type LOCK_TYPE,
l.lock_mode LOCK_MODE,
CONCAT(
FLOOR(HOUR(TIMEDIFF(now(), t.trx_wait_started)) / 24), 'day ',
MOD(HOUR(TIMEDIFF(now(), t.trx_wait_started)), 24), ':',
MINUTE(TIMEDIFF(now(), t.trx_wait_started)), ':',
second(TIMEDIFF(now(), t.trx_wait_started))) AS WAIT_TIME,
t.trx_started TRX_STARTED,
t.trx_isolation_level TRX_ISOLATION_LEVEL,
t.trx_rows_locked TRX_ROWS_LOCKED,
t.trx_rows_modified TRX_ROWS_MODIFIED,
p.info SQL_TEXT
from INFORMATION_SCHEMA.INNODB_TRX t
LEFT JOIN information_schema.innodb_lock_waits w on t.trx_id = w.requesting_trx_id
LEFT JOIN information_schema.innodb_trx wt on wt.trx_id = w.blocking_trx_id
INNER JOIN information_schema.innodb_locks l on l.lock_trx_id = t.trx_id
INNER JOIN information_schema.processlist p on t.trx_mysql_thread_id = p.id
ORDER BY 1
扫一扫
1668
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
