如何杀死mysql进程

向右看齐 2023-09-25 09:45 72阅读 0赞

## 杀掉所有MYSQL进程的命令这样写可以吗 ##

kill-9\`ps-ef|grepmysql|grep-vgrep||awk'\{print$2\}'\`

这样可以实现你的功能，要先取PID，并排除这条命了本身的PID，然后要用\`\`取得该命令的执行结果，然后kill-9。明白了吗？不明白可留言

## 通过什么指令杀死全部mysql进程 ##

kill掉第一个锁表的进程, 依然没有改善. 既然不改善, 咱们就想办法将所有锁表的进程kill掉吧, 简单的脚本如下.\#!/bin/bashmysql -u root -e "show processlist" | grep -i "Locked" >> locked\_log.txtfor line in \`cat locked\_log.txt | awk '\{print $1\}'\`echo "kill $line;" >> kill\_thread\_id.sql现在kill\_thread\_id.sql的内容像这个样子kill 66402982;kill 66402983;kill 66402986;kill 66402991;好了, 我们在mysql的shell中执行, 就可以把所有锁表的进程杀死了.mysql>source kill\_thread\_id.sql当然了, 也可以一行搞定for id in \`mysqladmin processlist | grep -i locked | awk '\{print $1\}'\`mysqladmin kill $\{id\}

## 杀掉所有MYSQL进程的命令这样写可以吗 ##

kill -9 \`ps -ef|grep mysql|grep -v grep||awk '\{print $2\}'\`

这样可以实现你的功能，要先取PID，并排除这条命了本身的PID，然后要用\`\`取得该命令的执行结果，然后kill -9。明白了吗？不明白可留言没有这种写法吧，

除非你自定义过 killed-9-ps 的杀进程的脚本你好！

首先你这个写法肯定不行，grep出来的结果只是输出到显示器而已，和没加一样，你可以写一个脚本，在一条命令中确实很不容易实现，脚本中ps然后判断cpu使用率然后用循环逐个杀掉，这样比较好。。

仅代表个人观点，不喜勿喷，谢谢。pkill -9 mysql 就可以了~~~你可以ps -anx | grep 'mysql'

然后查看pid

kill -9 进程号

mysql的进程，你可以一个个的删

## 如何 查找 mysql 中如何 kill 引起死锁的线程id ##

如果遇到死锁了，怎么解决呢?找到原始的锁ID，然后KILL掉一直持有的那个线程就可以了， 但是众多线程，可怎么找到引起死锁的线程ID呢? MySQL 发展到现在，已经非常强大了，这个问题很好解决。 直接从数据字典连查找。

我们来演示下。

线程A，我们用来锁定某些记录，假设这个线程一直没提交，或者忘掉提交了。 那么就一直存在，但是数据里面显示的只是SLEEP状态。

mysql> set @@autocommit=0;

Query OK, 0 rows affected (0.00 sec)

mysql> use test;

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

mysql> show tables;

\+----------------+

| Tables\_in\_test |

\+----------------+

| demo\_test|

| t3|

\+----------------+

2 rows in set (0.00 sec)

mysql> select \* from t3;

\+----+--------+--------+------------+----+----+----+

| id | fname | lname | birthday| c1 | c2 | c3 |

\+----+--------+--------+------------+----+----+----+

| 19 | lily19 | lucy19 | 2013-04-18 | 19 | 0 | 0 |

| 20 | lily20 | lucy20 | 2013-03-13 | 20 | 0 | 0 |

\+----+--------+--------+------------+----+----+----+

2 rows in set (0.00 sec)

mysql> update t3 set birthday = '2022-02-23' where id = 19;

Query OK, 1 row affected (0.00 sec)

Rows matched: 1 Changed: 1 Warnings: 0

mysql> select connection\_id();

\+-----------------+

| connection\_id() |

\+-----------------+

|16 |

\+-----------------+

1 row in set (0.00 sec)

mysql>

线程B， 我们用来进行普通的更新，但是遇到问题了，此时不知道是哪个线程把这行记录给锁定了?

mysql> use test;

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

mysql> select @@autocommit;

\+--------------+

| @@autocommit |

\+--------------+

|1 |

\+--------------+

1 row in set (0.00 sec)

mysql> update t3 set birthday='2018-01-03' where id = 19;

ERROR 1205 (HY000): Lock wait timeout exceeded; try restarting transaction

mysql> select connection\_id();

\+-----------------+

| connection\_id() |

\+-----------------+

|17 |

\+-----------------+

1 row in set (0.00 sec)

mysql> show processlist;

\+----+------+-----------+------+---------+------+-------+------------------+

\+----+------+-----------+------+---------+------+-------+------------------+

| 10 | root | localhost | NULL | Sleep| 1540 || NULL|

| 11 | root | localhost | NULL | Sleep| 722 || NULL|

| 16 | root | localhost | test | Sleep| 424 || NULL|

| 18 | root | localhost | NULL | Sleep|5 || NULL|

\+----+------+-----------+------+---------+------+-------+------------------+

5 rows in set (0.00 sec)

mysql> show engine innodb status\\G

\------------

TRANSACTIONS

\------------

Trx id counter 189327

Purge done for trx's n:o < 189323 undo n:o < 0 state: running but idle

History list length 343

LIST OF TRANSACTIONS FOR EACH SESSION:

\---TRANSACTION 0, not started

MySQL thread id 11, OS thread handle 0x7f70a0c98700, query id 994 localhost root init

show engine innodb status

\---TRANSACTION 189326, ACTIVE 2 sec starting index read

mysql tables in use 1, locked 1

LOCK WAIT 2 lock struct(s), heap size 376, 1 row lock(s)

MySQL thread id 17, OS thread handle 0x7f70a0bd5700, query id 993 localhost root updating

update t3 set birthday='2018-01-03' where id = 19

\------- TRX HAS BEEN WAITING 2 SEC FOR THIS LOCK TO BE GRANTED:

RECORD LOCKS space id 529 page no 3 n bits 72 index \`PRIMARY\` of table \`test\`.\`t3\` trx id 189326 lock\_mode X waiting

Record lock, heap no 2 PHYSICAL RECORD: n\_fields 9; compact format; info bits 0

0: len 2; hex 3139; asc 19;;

1: len 6; hex 00000002e38c; asc;;

2: len 7; hex 7e00000d2827c9; asc ~(' ;;

3: len 6; hex 6c696c793139; asc lily19;;

4: len 6; hex 6c7563793139; asc lucy19;;

5: len 3; hex 8fcc57; ascW;;

6: len 4; hex 80000013; asc;;

7: len 4; hex 80000000; asc;;

8: len 4; hex 80000000; asc;;

\------------------

\---TRANSACTION 189324, ACTIVE 641 sec

2 lock struct(s), heap size 376, 3 row lock(s), undo log entries 1

MySQL thread id 16, OS thread handle 0x7f70a0b94700, query id 985 localhost root cleaning up

Trx read view will not see trx with id >= 189325, sees < 189325

上面的信息很繁多，也看不清楚到底哪里是哪里。

不过现在，我们只要从数据字典里面拿出来这部分信息就OK了。

mysql> SELECT \* FROM information\_schema.INNODB\_TRX\\G

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* 1. row \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

trx\_id: 189324

trx\_state: RUNNING

trx\_started: 2013-04-18 17:48:14

trx\_requested\_lock\_id: NULL

trx\_wait\_started: NULL

trx\_weight: 3

trx\_mysql\_thread\_id: 16

trx\_query: NULL

trx\_operation\_state: NULL

trx\_tables\_in\_use: 0

trx\_tables\_locked: 0

trx\_lock\_structs: 2

trx\_lock\_memory\_bytes: 376

trx\_rows\_locked: 3

trx\_rows\_modified: 1

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: 10000

trx\_is\_read\_only: 0

trx\_autocommit\_non\_locking: 0

1 row in set (0.01 sec)

mysql>

原来是线程16忘掉COMMIT了。

如何杀死mysql进程

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