最近phpwind升級8.7后，經常出現宕機的現象，不是Apache卡死，吃光內存機器重啟，就是mysql數據庫被鎖，無奈！

多個原因，apache的版本過低，導致執(zhí)行效率慢；另外數據庫版本過低，查詢語句多時，自動鎖！網站幾乎不能訪問！另外就是程序可能也有點問題，測試頁面可以正常訪問！主頁卻不能打開！

把apache升級到2.2版本，程序轉移到了另一臺機器上，搭建LAMP環(huán)境，用于編譯php， 已經安裝好了mysql！? 試著運行，發(fā)現機器運行正常，無負載超高的現象，可是網站還是會卡，數據庫還是會鎖死！

聯系到phpwind官方尋找技術支持，的確有bug，官方同意幫我們解決！

我們也考慮到把數據版本也升級下，由于機器暫時緊缺，只能在程序上搭建，一條船上前線，哈哈！

采用二進制文件安裝mysql

初始化正常，添加mysql服務，可是啟動的時候出現問題了

[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

查看了很多資料，最終還是官方的文檔給力：

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::.

我之前執(zhí)行的是?? chown -R mysql：mysql? .

官方： shell> chown -R root .

shell> chown -R mysql data

最后修正重啟：

[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

關閉重啟：

[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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