最近phpwind升级8.7后，经常出现宕机的现象，不是Apache卡死，吃光内存机器重启，就是mysql数据库被锁，无奈！
多个原因，apache的版本过低，导致执行效率慢；另外数据库版本过低，查询语句多时，自动锁！网站几乎不能访问！另外就是程序可能也有点问题，测试页面可以正常访问！主页却不能打开！
把apache升级到2.2版本，程序转移到了另一台机器上，搭建LAMP环境，用于编译php， 已经安装好了mysql！ 试着运行，发现机器运行正常，无负载超高的现象，可是网站还是会卡，数据库还是会锁死！
联系到phpwind官方寻找技术支持，的确有bug，官方同意帮我们解决！
我们也考虑到把数据版本也升级下，由于机器暂时紧缺，只能在程序上搭建，一条船上前线，哈哈！
采用二进制文件安装mysql
初始化正常，添加mysql服务，可是启动的时候出现问题了
[root@localhost scripts]# /usr/local/mysql5.0.45/bin/mysqld_safe --defaults-file=/etc/my.cnf --user=mysql &
[1] 31358
[root@localhost scripts]# The file /usr/local/mysql/bin/mysqld doesn't exist or is not executable
Please do a cd to the mysql installation directory and restart
this script from there as follows:
./bin/mysqld_safe.
See http://dev.mysql.com/doc/mysql/en/mysqld_safe.html for more
information
\
[1]+ Exit 1 /usr/local/mysql5.0.45/bin/mysqld_safe --defaults-file=/etc/my.cnf --user=mysql
查看了很多资料，最终还是官方的文档给力：
5. Change location into the installation directory:
shell> cd mysql
You will find several files and subdirectories in the `mysql'
directory. The most important for installation purposes are the
`bin' and `scripts' subdirectories:
* The `bin' directory contains client programs and the server.
You should add the full pathname of this directory to your
`PATH' environment variable so that your shell finds the MySQL
programs properly. See *Note environment-variables::.
* The `scripts' directory contains the `mysql_install_db'
script used to initialize the `mysql' database containing the
grant tables that store the server access permissions.
6. Ensure that the distribution contents are accessible to `mysql'.
If you unpacked the distribution as `mysql', no further action is
required. If you unpacked the distribution as `root', its contents
will be owned by `root'. Change its ownership to `mysql' by
executing the following commands as `root' in the installation
directory:
shell> chown -R mysql .
shell> chgrp -R mysql .
The first command changes the owner attribute of the files to the
`mysql' user. The second changes the group attribute to the
`mysql' group.
7. If you have not installed MySQL before, you must create the MySQL
data directory and initialize the grant tables:
shell> scripts/mysql_install_db --user=mysql
If you run the command as `root', include the `--user' option as
shown. If you run the command while logged in as that user, you
can omit the `--user' option.
The command should create the data directory and its contents with
`mysql' as the owner.
After creating or updating the grant tables, you need to restart
the server manually.
8. Most of the MySQL installation can be owned by `root' if you like.
The exception is that the data directory must be owned by `mysql'.
To accomplish this, run the following commands as `root' in the
installation directory:
shell> chown -R root .
shell> chown -R mysql data
9. If you want MySQL to start automatically when you boot your
machine, you can copy `support-files/mysql.server' to the location
where your system has its startup files. More information can be
found in the `support-files/mysql.server' script itself and in
*Note automatic-start::.
我之前执行的是 chown -R mysql：mysql .
官方： shell> chown -R root .
shell> chown -R mysql data
最后修正重启：
[root@localhost mysql5.0.45]# chown -R root .
[root@localhost mysql5.0.45]# chown -R mysql data
[root@localhost mysql5.0.45]# ./bin/mysqld_safe --user=mysql &
[1] 31480
[root@localhost mysql5.0.45]# Starting mysqld daemon with databases from /mysqldata
关闭重启：
[root@localhost mysql5.0.45]# /usr/local/mysql5.0.45/bin/mysqladmin -u root shutdown
STOPPING server from pid file /mysqldata/localhost.localdomain.pid
110928 10:49:34 mysqld ended
[1]+ Done ./bin/mysqld_safe --user=mysql
[root@localhost mysql5.0.45]# ./bin/mysqld_safe --user=mysql &
[1] 31654
[root@localhost mysql5.0.45]# Starting mysqld daemon with databases from /mysqldata
正常！ok
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