MySQL未提交事务造成的等待事件怎么解决

109次阅读

共计 1629 个字符，预计需要花费 5 分钟才能阅读完成。

本篇内容主要讲解“MySQL 未提交事务造成的等待事件怎么解决”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让丸趣 TV 小编来带大家学习“MySQL 未提交事务造成的等待事件怎么解决”吧!

开发人员过来说程序中无法修改数据
ERROR 1205 (HY000): Lock wait timeout exceeded; try restarting transaction

查看是如下 SQL 语句造成的
UPDATE
MemberAttribute
SET name = 而 ,required = 1, enabled = 1, sequence = 34

, memberTemplate_id = 698

WHERE
id = 284 and deleted = false；

刚开始一直考虑死锁，但一直无死锁信息

如果单独的一条 sql 是不会千万死锁的，肯定有其他语句
查看未提交的事务
SELECT
a.trx_id,
a.trx_state,
a.trx_started,
a.trx_query,
b.ID,
b.USER,
b.DB,
b.COMMAND,
b.TIME,
b.STATE,
b.INFO,
c.PROCESSLIST_USER,
c.PROCESSLIST_HOST,
c.PROCESSLIST_DB,
d.SQL_TEXT
FROM
information_schema.INNODB_TRX a
LEFT JOIN information_schema.PROCESSLIST b ON a.trx_mysql_thread_id = b.id
AND b.COMMAND = Sleep
LEFT JOIN PERFORMANCE_SCHEMA.threads c ON b.id = c.PROCESSLIST_ID
LEFT JOIN PERFORMANCE_SCHEMA.events_statements_current d ON d.THREAD_ID = c.THREAD_ID;

确实有未提交事务

查看未提交线程 id
SELECT * FROM information_schema.INNODB_TRX \G
*************************** 12. row ***************************
trx_id: 188721461
trx_state: RUNNING
trx_started: 2016-01-06 09:41:22
trx_requested_lock_id: NULL
trx_wait_started: NULL
trx_weight: 26
trx_mysql_thread_id: 2122328
trx_query: NULL
trx_operation_state: NULL
trx_tables_in_use: 0
trx_tables_locked: 0
trx_lock_structs: 24
trx_lock_memory_bytes: 6544
trx_rows_locked: 3003
trx_rows_modified: 2
trx_concurrency_tickets: 0
trx_isolation_level: REPEATABLE READ
trx_unique_checks: 1
trx_foreign_key_checks: 1
trx_last_foreign_key_error: NULL
trx_adaptive_hash_latched: 0
trx_adaptive_hash_timeout: 0
trx_is_read_only: 0
trx_autocommit_non_locking: 0
与 niravana 数据库相关的进程只有 2122328
kill 2122328
再次修改即可