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HomeDatabaseMysql Tutorialmysql 无法连接问题的定位和修复过程分享_MySQL

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定位结果如下:

客户环境:
windows server 2003 r2 standard edition sp2
mysql Ver 14.12 Distrib 5.0.18, for Win32 (ia32)
apache 2.2
瑞星
webshield客户端1.08

问题已复现。可以优化,无法确定是webshield导致的。

搭建环境:
windows server 2003 r2 standard edition sp2
mysql 5.0.18 for win32
apache-2.2.21-win32-x86-no_ssl
php-5.2.17-win32-vc6-x86
瑞星23.00.50.25

搭建环境过程中遇到的几个问题:

在下载apache与php时,请注意apache与php匹配问题。

a)PHP5.3有VC6与VC9版本,应选择VC6版本。原因如下:

i. VC6版本是使用Visual Studio 6编译器编译的,如果你的PHP是用Apache来架设的,那你就选择VC6版本。
ii. VC9版本是使用Visual Studio 2008编译器编译的,如果你的PHP是用IIS来架设的,那你就选择VC9版本。

b)PHP5.3的Thread Safe和Non Thread Safe版本。Apache no_ssl版应与php Thread Safe版搭配。若与Non Thread Safe搭配,apache启动出错:“Apache is running a threaded MPM,but your PHP Modle is not compiled to be threadsafe. You need to recompile PHP.”

i. Thread Safe是线程安全,执行时会进行线程(Thread)安全检查,以防止有新要求就启动新线程的CGI执行方式而耗尽系统资源。ISAPI执行方式是以DLL动态库的形式使用,可以在被用户请求后执行,在处理完一个用户请求后不会马上消失,所以需要进行线程安全检查,这样来提高程序的执行效率,所以如果是以ISAPI来执行PHP,建议选择Thread Safe版本;
ii. Non Thread Safe是非线程安全,在执行时不进行线程(Thread)安全检查。FastCGI执行方式是以单一线程来执行操作,所以不需要进行线程的安全检查,除去线程安全检查的防护反而可以提高执行效率,所以,如果是以FastCGI来执行PHP,建议选择Non Thread Safe版本。
注意apache对网站及PHP的正确配置。特别注意配置文件中LoadModule, PHPIniDir,DocumentRoot,ServerRoot,Directory,DirectoryIndex,AddType application/x-httpd-php等项的配置
安装后 mysql 后(管理员账号密码:admin/admin),在PHP代码中使用admin连接数据库失败,cmd执行mysql

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