[PHP] - 性能加速 - 开启opcache
说明
PHP 5.5+版本以上的,可以使用PHP自带的opcache开启性能加速(默认是关闭的)。对于PHP 5.5以下版本的,需要使用APC加速,这里不说明,可以自行上网搜索PHP APC加速的方法。
PHP开启opcache方法
1、打开php.ini文件
2、找到:[opcache],设置为:
<span style="color: #800000; font-weight: bold;">[</span><span style="color: #800000;">opcache</span><span style="color: #800000; font-weight: bold;">]</span> <span style="color: #008000;">;</span><span style="color: #008000;"> dll地址</span> zend_extension=<span style="color: #000000;">php_opcache.dll </span><span style="color: #008000;">;</span><span style="color: #008000;"> 开关打开</span> opcache.enable=1 <span style="color: #008000;">;</span><span style="color: #008000;"> 开启CLI</span> opcache.enable_cli=1 <span style="color: #008000;">;</span><span style="color: #008000;"> 可用内存, 酌情而定, 单位为:Mb</span> opcache.memory_consumption=528 <span style="color: #008000;">;</span><span style="color: #008000;"> Zend Optimizer + 暂存池中字符串的占内存总量.(单位:MB)</span> opcache.interned_strings_buffer=8 <span style="color: #008000;">;</span><span style="color: #008000;"> 对多缓存文件限制, 命中率不到 100% 的话, 可以试着提高这个值</span> opcache.max_accelerated_files=10000 <span style="color: #008000;">;</span><span style="color: #008000;"> Opcache 会在一定时间内去检查文件的修改时间, 这里设置检查的时间周期, 默认为 2, 定位为秒</span> opcache.revalidate_freq=1 <span style="color: #008000;">;</span><span style="color: #008000;"> 打开快速关闭, 打开这个在PHP Request Shutdown的时候回收内存的速度会提高</span> opcache.fast_shutdown=1
3、重启apache即可。
测试
配置完成后,可以使用如下代码查询opcache:
<span style="color: #000000;">php </span><span style="color: #008080;">phpinfo</span><span style="color: #000000;">(); </span>?>
访问页面得到如下界面:
以下是opcache的配置说明:
<span style="color: #800000; font-weight: bold;">[</span><span style="color: #800000;">opcache</span><span style="color: #800000; font-weight: bold;">]</span><span style="color: #000000;"> zend_extension </span>= "G:/PHP/php-5.5.6-Win32-VC11-x64/ext/php_opcache.dll" <span style="color: #008000;">;</span><span style="color: #008000;"> Zend Optimizer + 的开关, 关闭时代码不再优化.</span> opcache.enable=1 <span style="color: #008000;">;</span><span style="color: #008000;"> Determines if Zend OPCache is enabled for the CLI version of PHP</span> opcache.enable_cli=1 <span style="color: #008000;">;</span><span style="color: #008000;"> Zend Optimizer + 共享内存的大小, 总共能够存储多少预编译的 PHP 代码(单位:MB)</span><span style="color: #008000;"> ;</span><span style="color: #008000;"> 推荐 128</span> opcache.memory_consumption=64 <span style="color: #008000;">;</span><span style="color: #008000;"> Zend Optimizer + 暂存池中字符串的占内存总量.(单位:MB)</span><span style="color: #008000;"> ;</span><span style="color: #008000;"> 推荐 8</span> opcache.interned_strings_buffer=4 <span style="color: #008000;">;</span><span style="color: #008000;"> 最大缓存的文件数目 200 到 100000 之间</span><span style="color: #008000;"> ;</span><span style="color: #008000;"> 推荐 4000</span> opcache.max_accelerated_files=2000 <span style="color: #008000;">;</span><span style="color: #008000;"> 内存“浪费”达到此值对应的百分比,就会发起一个重启调度.</span> opcache.max_wasted_percentage=5 <span style="color: #008000;">;</span><span style="color: #008000;"> 开启这条指令, Zend Optimizer + 会自动将当前工作目录的名字追加到脚本键上,</span><span style="color: #008000;"> ;</span><span style="color: #008000;"> 以此消除同名文件间的键值命名冲突.关闭这条指令会提升性能,</span><span style="color: #008000;"> ;</span><span style="color: #008000;"> 但是会对已存在的应用造成破坏.</span> opcache.use_cwd=0 <span style="color: #008000;">;</span><span style="color: #008000;"> 开启文件时间戳验证 </span> opcache.validate_timestamps=1 <span style="color: #008000;">;</span><span style="color: #008000;"> 2s检查一次文件更新 注意:0是一直检查不是关闭</span><span style="color: #008000;"> ;</span><span style="color: #008000;"> 推荐 60</span> opcache.revalidate_freq=2 <span style="color: #008000;">;</span><span style="color: #008000;"> 允许或禁止在 include_path 中进行文件搜索的优化</span><span style="color: #008000;"> ;</span><span style="color: #008000;">opcache.revalidate_path=0</span> <span style="color: #008000;">;</span><span style="color: #008000;"> 是否保存文件/函数的注释 如果apigen、Doctrine、 ZF2、 PHPUnit需要文件注释</span><span style="color: #008000;"> ;</span><span style="color: #008000;"> 推荐 0</span> opcache.save_comments=1 <span style="color: #008000;">;</span><span style="color: #008000;"> 是否加载文件/函数的注释</span><span style="color: #008000;"> ;</span><span style="color: #008000;">opcache.load_comments=1</span> <span style="color: #008000;">;</span><span style="color: #008000;"> 打开快速关闭, 打开这个在PHP Request Shutdown的时候会收内存的速度会提高</span><span style="color: #008000;"> ;</span><span style="color: #008000;"> 推荐 1</span> opcache.fast_shutdown=1 <span style="color: #008000;">;</span><span style="color: #008000;">允许覆盖文件存在(file_exists等)的优化特性。</span><span style="color: #008000;"> ;</span><span style="color: #008000;">opcache.enable_file_override=0</span> <span style="color: #008000;">;</span><span style="color: #008000;"> 定义启动多少个优化过程</span><span style="color: #008000;"> ;</span><span style="color: #008000;">opcache.optimization_level=0xffffffff</span> <span style="color: #008000;">;</span><span style="color: #008000;"> 启用此Hack可以暂时性的解决”can’t redeclare class”错误.</span><span style="color: #008000;"> ;</span><span style="color: #008000;">opcache.inherited_hack=1</span> <span style="color: #008000;">;</span><span style="color: #008000;"> 启用此Hack可以暂时性的解决”can’t redeclare class”错误.</span><span style="color: #008000;"> ;</span><span style="color: #008000;">opcache.dups_fix=0</span> <span style="color: #008000;">;</span><span style="color: #008000;"> 设置不缓存的黑名单</span><span style="color: #008000;"> ;</span><span style="color: #008000;"> 不缓存指定目录下cache_开头的PHP文件. /png/www/example.com/public_html/cache/cache_ </span><span style="color: #008000;"> ;</span><span style="color: #008000;">opcache.blacklist_filename=</span> <span style="color: #008000;">;</span><span style="color: #008000;"> 通过文件大小屏除大文件的缓存.默认情况下所有的文件都会被缓存.</span><span style="color: #008000;"> ;</span><span style="color: #008000;">opcache.max_file_size=0</span> <span style="color: #008000;">;</span><span style="color: #008000;"> 每 N 次请求检查一次缓存校验.默认值0表示检查被禁用了.</span><span style="color: #008000;"> ;</span><span style="color: #008000;"> 由于计算校验值有损性能,这个指令应当紧紧在开发调试的时候开启.</span><span style="color: #008000;"> ;</span><span style="color: #008000;">opcache.consistency_checks=0</span> <span style="color: #008000;">;</span><span style="color: #008000;"> 从缓存不被访问后,等待多久后(单位为秒)调度重启</span><span style="color: #008000;"> ;</span><span style="color: #008000;">opcache.force_restart_timeout=180</span> <span style="color: #008000;">;</span><span style="color: #008000;"> 错误日志文件名.留空表示使用标准错误输出(stderr).</span><span style="color: #008000;"> ;</span><span style="color: #008000;">opcache.error_log=</span> <span style="color: #008000;">;</span><span style="color: #008000;"> 将错误信息写入到服务器(Apache等)日志</span><span style="color: #008000;"> ;</span><span style="color: #008000;">opcache.log_verbosity_level=1</span> <span style="color: #008000;">;</span><span style="color: #008000;"> 内存共享的首选后台.留空则是让系统选择.</span><span style="color: #008000;"> ;</span><span style="color: #008000;">opcache.preferred_memory_model=</span> <span style="color: #008000;">;</span><span style="color: #008000;"> 防止共享内存在脚本执行期间被意外写入, 仅用于内部调试.</span><span style="color: #008000;"> ;</span><span style="color: #008000;">opcache.protect_memory=0</span>
文章参考
使用 OpCache 提升 PHP 5.5+ 程序性能
https://phphub.org/topics/301
php opcache 配置
https://blog.hackroad.com/operations-engineer/windows_server/9311.html

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