解析mysql自动停止服务解决办法

我想很多朋友都有碰到过mysql服务器突然自动停止或又会自动启动吧,下面我们来分析一下原因与停止的解决办法.

分析原因一:Mysql的自动备份功能可能导致数据库在备份的时候先关闭服务，而在此启动的时候服务器不响应，开始-运行-services.msc，打开windows服务找到mysql的服务并双击，点击恢复选项卡，第一次失败：默认是“不操作”,改成”重新启动服务”。

在下方的“重新启动服务：分钟后”添上“0”表示如果服务意外终止则立即重启动。点击确定使设置生效。这时候你在任务管理器里结束mysql-nt进程，会发现结束不掉，不过要注意，这样mysql.exe是停不了的，如果要停必须把刚才修改的改回来.)

分析原因二:可能是mysql连接问题

修改mysql的最大连接数, 使用内存变量修改法修改mysql的最大连接数

步骤如下,同时适用windows和linux平台:

a、客户端登录mysql，输入用户名和密码’

b、在mysql命令提示符下设置新的最大连接数为500：mysql> set global max_connections=500

c、显示当前运行的query：mysql> show processlist

d、显示当前mysql 系统参数状态：mysql> show status# k;

e、退出客户端：mysql> exit’

查看当前最大连接数只需要通过在mysqladmin所在目录下执行以下命令：mysqladmin -username -password variables |find “max_con” 即可看到。也可以使用php教程myadmin里头的mysql参数列表查看最大连接数。

缺点:重启计算机或者mysql后最大连接数又会复位成初始值，需要重新设定。

修改my.ini或my.cnf文件法（需要重启mysql），可参考同目录下mysql的配置模板（小内存、大内存、超大内存） . e windows系统下打开my.ini文件找到set-variable =max_connections=100这一行，改成需要设定的最大连接数，然后重启即可。

linux控制台下:

1、打开my.cnf文件：vi /etc/my.cnf

2 在[mysqld]段下修改max_connections的值为设定值。

注意:可能大家安装的mysql来源和版本不同,windows下mysql+iis和php+apache+mysql套件最终安装结果几乎都不相同,my.ini文件的路径可能有些不同，my.ini可能还会保留一份在c:windows目录下需要同时修改,这个方法是我在无意中发现的,经测试是可行的,下面拿出来和大家分享.

我的电脑 -> 右击 -> 服务 -> 找到 mysql服务 双击 新窗口中 -> 恢复 -> 第一次失败 设置为 重新启动服务.

下面重置失败计数 设置为0 重新启动服务 设置为0,就这样,就轻松搞定了mysql 自动停止的问题.

另外一种情况:

1. 10090422:37:27InnoDB:Logfile.ib_logfile0didnotexist:newtobecreated
2. InnoDB:Settinglogfile.ib_logfile0sizeto10MB
3. InnoDB:Databasephysicallywritesthefilefull:wait...
4. 10090422:37:28InnoDB:Logfile.ib_logfile1didnotexist:newtobecreated
5. InnoDB:Settinglogfile.ib_logfile1sizeto10MB
6. InnoDB:Databasephysicallywritesthefilefull:wait...
7. InnoDB:Doublewritebuffernotfound:creatingnew
8. InnoDB:Doublewritebuffercreated
9. InnoDB:Creatingforeignkeyconstraintsystemtables
10. InnoDB:Foreignkeyconstraintsystemtablescreated
11. 10090422:37:29InnoDB:Started;logsequencenumber00
12. 10090422:37:29[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
13. 10090422:37:29[ERROR]Aborting
15. 10090422:37:29InnoDB:Startingshutdown...
16. 10090422:37:31InnoDB:Shutdowncompleted;logsequencenumber043655
17. 10090422:37:31[Note]wampmysqld:Shutdowncomplete
19. 10090422:43:42InnoDB:Started;logsequencenumber043655
20. 10090422:43:42[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
21. 10090422:43:42[ERROR]Aborting
23. 10090422:43:42InnoDB:Startingshutdown...
24. 10090422:43:45InnoDB:Shutdowncompleted;logsequencenumber043655
25. 10090422:43:45[Note]wampmysqld:Shutdowncomplete
27. 10090422:43:49InnoDB:Started;logsequencenumber043655
28. 10090422:43:49[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
29. 10090422:43:49[ERROR]Aborting
31. 10090422:43:49InnoDB:Startingshutdown...
32. 10090422:43:52InnoDB:Shutdowncompleted;logsequencenumber043655
33. 10090422:43:52[Note]wampmysqld:Shutdowncomplete
35. 1009058:23:24InnoDB:Started;logsequencenumber043655
36. 1009058:23:24[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
37. 1009058:23:24[ERROR]Aborting
39. 1009058:23:24InnoDB:Startingshutdown...
40. 1009058:23:27InnoDB:Shutdowncompleted;logsequencenumber043655
41. 1009058:23:27[Note]wampmysqld:Shutdowncomplete
43. 1009058:23:28InnoDB:Started;logsequencenumber043655
44. 1009058:23:28[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
45. 1009058:23:28[ERROR]Aborting
47. 1009058:23:28InnoDB:Startingshutdown...
48. 1009058:23:30InnoDB:Shutdowncompleted;logsequencenumber043655
49. 1009058:23:30[Note]wampmysqld:Shutdowncomplete
51. 1009058:41:35InnoDB:Started;logsequencenumber043655
52. 1009058:41:35[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
53. 1009058:41:35[ERROR]Aborting
55. 1009058:41:35InnoDB:Startingshutdown...
56. 1009058:41:37InnoDB:Shutdowncompleted;logsequencenumber043655
57. 1009058:41:37[Note]wampmysqld:Shutdowncomplete
59. 1009058:41:42InnoDB:Started;logsequencenumber043655
60. 1009058:41:42[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
61. 1009058:41:42[ERROR]Aborting
63. 1009058:41:42InnoDB:Startingshutdown...
64. 1009058:41:45InnoDB:Shutdowncompleted;logsequencenumber043655
65. 1009058:41:45[Note]wampmysqld:Shutdowncomplete
67. 1009058:47:15InnoDB:Started;logsequencenumber043655
68. 1009058:47:15[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
69. 1009058:47:15[ERROR]Aborting
71. 1009058:47:15InnoDB:Startingshutdown...
72. 1009058:47:17InnoDB:Shutdowncompleted;logsequencenumber043655
73. 1009058:47:17[Note]wampmysqld:Shutdowncomplete
75. 1009058:54:20InnoDB:Started;logsequencenumber043655
76. 1009058:54:20[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
77. 1009058:54:20[ERROR]Aborting
79. 1009058:54:20InnoDB:Startingshutdown...
80. 1009058:54:23InnoDB:Shutdowncompleted;logsequencenumber043655
81. 1009058:54:23[Note]wampmysqld:Shutdowncomplete
83. 1009058:54:53InnoDB:Started;logsequencenumber043655
84. 1009058:54:53[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
85. 1009058:54:53[ERROR]Aborting
87. 1009058:54:53InnoDB:Startingshutdown...
88. 1009058:54:55InnoDB:Shutdowncompleted;logsequencenumber043655
89. 1009058:54:55[Note]wampmysqld:Shutdowncomplete
91. 1009058:58:20InnoDB:Started;logsequencenumber043655
92. 1009058:58:20[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
93. 1009058:58:20[ERROR]Aborting
95. 1009058:58:20InnoDB:Startingshutdown...
96. 1009058:58:22InnoDB:Shutdowncompleted;logsequencenumber043655
97. 1009058:58:22[Note]wampmysqld:Shutdowncomplete
99. 1009058:59:57InnoDB:Started;logsequencenumber043655
100. 1009058:59:57[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
101. 1009058:59:57[ERROR]Aborting
103. 1009058:59:57InnoDB:Startingshutdown...
104. 1009059:00:00InnoDB:Shutdowncompleted;logsequencenumber043655
105. 1009059:00:00[Note]wampmysqld:Shutdowncomplete
107. 1009059:02:21InnoDB:Started;logsequencenumber043655
108. 1009059:02:21[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
109. 1009059:02:21[ERROR]Aborting
111. 1009059:02:21InnoDB:Startingshutdown...
112. 1009059:02:23InnoDB:Shutdowncompleted;logsequencenumber043655
113. 1009059:02:23[Note]wampmysqld:Shutdowncomplete
115. 1009059:02:29InnoDB:Started;logsequencenumber043655
116. 1009059:02:29[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
117. 1009059:02:29[ERROR]Aborting
119. 1009059:02:29InnoDB:Startingshutdown...
120. 1009059:02:31InnoDB:Shutdowncompleted;logsequencenumber043655
121. 1009059:02:31[Note]wampmysqld:Shutdowncomplete
123. 1009059:08:16InnoDB:Started;logsequencenumber043655
124. 1009059:08:16[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
125. 1009059:08:16[ERROR]Aborting
127. 1009059:08:16InnoDB:Startingshutdown...
128. 1009059:08:18InnoDB:Shutdowncompleted;logsequencenumber043655
129. 1009059:08:18[Note]wampmysqld:Shutdowncomplete
131. 1009059:08:54InnoDB:Started;logsequencenumber043655
132. 1009059:08:54[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
133. 1009059:08:54[ERROR]Aborting
135. 1009059:08:54InnoDB:Startingshutdown...
136. 1009059:08:56InnoDB:Shutdowncompleted;logsequencenumber043655
137. 1009059:08:56[Note]wampmysqld:Shutdowncomplete
139. 1009059:35:05InnoDB:Started;logsequencenumber043655
140. 1009059:35:05[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
141. 1009059:35:05[ERROR]Aborting
143. 1009059:35:05InnoDB:Startingshutdown...
144. 1009059:35:08InnoDB:Shutdowncompleted;logsequencenumber043655
145. 1009059:35:08[Note]wampmysqld:Shutdowncomplete
147. 1009059:38:08InnoDB:Started;logsequencenumber043655
148. 1009059:38:08[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
149. 1009059:38:08[ERROR]Aborting
151. 1009059:38:08InnoDB:Startingshutdown...
152. 1009059:38:10InnoDB:Shutdowncompleted;logsequencenumber043655
153. 1009059:38:10[Note]wampmysqld:Shutdowncomplete
155. 10090516:18:51InnoDB:Started;logsequencenumber043655
156. 10090516:18:52[ERROR]Doyoualreadyhaveanothermysqldserverrunningonport:3306?
157. 10090516:18:52[ERROR]Aborting
158. --phpfensi.com
159. 10090516:18:52InnoDB:Startingshutdown...
160. 10090516:18:54InnoDB:Shutdowncompleted;logsequencenumber043655
161. 10090516:18:54[Note]wampmysqld:Shutdowncomplete

经过分析是:3306端口被占用了.

1.以前安装的mysql没有卸载干净

2.其他程序（如迅雷随机获取端口号）占用了3306端口

这样就好办了,只要在mysql配置文件把端口修改一下就可以了.