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mysql无法启动的解决办法
mysql无法启动
在停止mysql之后，执行了一些操作（如修改主机名），重新启动 mysql，发现起不来。
[root@www ~]$ service mysql start starting mysql..^[[a.................................................................................................. error! the server quit without updating pid file (/disk/mysql/www.pid). [root@www ~]$ service mysql stop error! mysql server pid file could not be found! [root@www ~]$ service mysql stop error! mysql server pid file could not be found! [root@www ~]$ service mysql start starting mysql.................. 还是老样子，只好 ctr+c 掉。 [root@www ~]$
实在是启动不了，看一下日志：/disk/mysql/www.err
120608 09:56:17 mysqld_safe starting mysqld daemon with databases from /disk/mysql 120608 9:56:17 [note] plugin 'federated' is disabled. 120608 9:56:17 innodb: the innodb memory heap is disabled 120608 9:56:17 innodb: mutexes and rw_locks use innodb's own implementation 120608 9:56:17 innodb: compressed tables use zlib 1.2.3 120608 9:56:17 innodb: using linux native aio 120608 9:56:17 innodb: initializing buffer pool, size = 128.0m 120608 9:56:17 innodb: completed initialization of buffer pool innodb: unable to lock ./ibdata1, error: 11 innodb: check that you do not already have another mysqld process innodb: using the same innodb data or log files. 120608 9:56:17 innodb: retrying to lock the first data file innodb: unable to lock ./ibdata1, error: 11 innodb: check that you do not already have another mysqld process innodb: using the same innodb data or log files. innodb: unable to lock ./ibdata1, error: 11 innodb: check that you do not already have another mysqld process innodb: using the same innodb data or log files. innodb: unable to lock ./ibdata1, error: 11 ...
好像是原来的 mysqld 并没有停下来。
强制终止 mysqld
[root@www ~]$ ps -ef|grep mysql root 4769 1 0 jun06 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe --datadir=/disk/mysql --pid-file=/disk/mysql/localhost.pid mysql 4874 4769 0 jun06 ? 00:04:04 /usr/sbin/mysqld --basedir=/usr --datadir=/disk/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql --log-error=/disk/mysql/localhost.err --pid-file=/disk/mysql/localhost.pid --socket=/disk/mysql/mysql.sock root 17947 1 0 09:56 pts/1 00:00:00 /bin/sh /usr/bin/mysqld_safe --datadir=/disk/mysql --pid-file=/disk/mysql/www.pid mysql 18052 17947 0 09:56 pts/1 00:00:00 /usr/sbin/mysqld --basedir=/usr --datadir=/disk/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql --log-error=/disk/mysql/www.err --pid-file=/disk/mysql/www.pid --socket=/disk/mysql/mysql.sock root 18099 17514 0 09:56 pts/1 00:00:00 grep mysql [root@www ~]$ killall mysqld [root@www ~]$ killall mysqld [root@www ~]$ ps -ef|grep mysql root 18116 17514 0 09:57 pts/1 00:00:00 grep mysql [root@www ~]$
启动 mysqld ，现在执行多次启动命令都没有问题。
[root@www ~]$ service mysql start starting mysql. success! [root@www ~]$ [root@www ~]$ [root@www ~]$ [root@www ~]$ [root@www ~]$ service mysql start starting mysql success! [root@www ~]$
前面 www.err 文件中显示的 error: 11 到底是什么，看下：
[root@www ~]$ perror 11 os error code 11: resource temporarily unavailable [root@www ~]$ [root@www ~]$
以上就是mysql无法启动的解决办法示例分享的详细内容。