在用的mysql Server 无法启动、日志如下：

复制代码 代码示例:

130507 12:22:11  mysqld started

130507 12:22:11 [Warning] option 'max_join_size': unsigned value 18446744073709551615 adjusted to 4294967295

130507 12:22:11 [Warning] option 'max_join_size': unsigned value 18446744073709551615 adjusted to 4294967295

130507 12:22:11 [ERROR] /usr/libexec/mysqld: unknown variable 'table_open_cache=64'

开始时把table_open_cache=64注释掉、并在 /etc/my.cnf 下添加如下：

max_join_size=4294967295

但tail -f alert.log 时仍然报错：

130507 12:39:50 [Warning] option 'max_join_size': unsigned value 18446744073709551615 adjusted to 4294967295

130507 12:39:50 [Warning] option 'max_join_size': unsigned value 18446744073709551615 adjusted to 4294967295

130507 12:39:50 [ERROR] Can't find messagefile '/home/mysql/mysql/share/mysql/english/errmsg.sys'

问题本质：mysqld_safe & 的启动目录不对、

到官网查看说 max_join_size 是 bug。

启动目录不对就抛一个 bug。

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MySQL Server 无法启动错误诊断一则

复制代码 代码示例:

mysql 启动

mysql> select version()\G;

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

version(): 5.5.16-log

1 row in set (0.00 sec)

[mysql@cdio ~]$ mysqld_safe &

[1] 3036

[mysql@cdio ~]$ 130506 19:16:34 mysqld_safe Logging to '/home/mysql/mysql/log/alert.log'.

130506 19:16:34 mysqld_safe Starting mysqld daemon with databases from /home/mysql/mysql/data

130506 19:16:36 mysqld_safe mysqld from pid file /home/mysql/mysql/data/cdio.pid ended

查看日志、发现：

复制代码 代码示例:

130506 17:40:19 [ERROR] /home/mysql/mysql/bin/mysqld: unknown variable 'inactive_timeout=172800'

130506 17:40:19 [ERROR] Aborting

原来是inactive_timeout拼错了、该参数为interactive_timeout。