{"id":1797,"date":"2014-01-10T12:42:26","date_gmt":"2014-01-10T12:42:26","guid":{"rendered":"http:\/\/blog.designed79.co.uk\/?p=1797"},"modified":"2014-01-10T12:42:46","modified_gmt":"2014-01-10T12:42:46","slug":"using-php-5-5s-new-opcache-opcode-cache","status":"publish","type":"post","link":"https:\/\/blog.designed79.co.uk\/?p=1797","title":{"rendered":"Using PHP 5.5’s New “OPcache” Opcode Cache"},"content":{"rendered":"

Zend have contributed their Zend Optimizer+ opcode cache to PHP – thanks Zend!!! (Update 19 March 2013: the renaming to “Zend OPcache” is complete)<\/span><\/p>\n

\n

 <\/p>\n

“The Zend OPcache provides faster PHP execution through opcode caching and optimization.”<\/p><\/blockquote>\n

 <\/p>\n

The new OPcache extension can be seen as substitute for the venerable\u00a0APC cache<\/a>, the maintenance of which had become an issue. Note: although OPcache is now readily available, there is currently nothing preventing you from using any available (working!) opcode cache in PHP 5.5.<\/p>\n

A few minutes ago Dmitry Stogov did the physical merge to the PHP 5.5 source’s\u00a0<\/p>\n

ext\/opcache<\/div><\/div>\n

\u00a0directory. The currentPHP 5.5 snapshot<\/a>\u00a0has the code. Future Alpha or Beta (and Production) releases will include it too.<\/p>\n

Please test OPcache. It is not a panacea for all performance problems. There are a lot of settings which may need adjusting. Understanding how it works and identifying issues during the stabilization phase of PHP 5.5 release process will greatly help.<\/p>\n

To build Zend OPcache for PHP 5.5:<\/b><\/p>\n

When you configure PHP, add the option\u00a0<\/p>\n

--enable-opcache<\/div><\/div>\n

\u00a0like:<\/p>\n

.\/configure ... --enable-opcache<\/pre>\n
Then\u00a0<\/p>\n
make<\/div><\/div>\n
\u00a0and\u00a0<\/p>\n
make install<\/div><\/div>\n
, as normal. This will build OPcache shared extension. It’s not possible to build it statically.<\/p>\n
Find the shared library in your installation directory with a command like\u00a0<\/p>\n
find \/home\/cjones\/php55 -name opcache.so<\/div><\/div>\n
Edit\u00a0<\/p>\n
php.ini<\/div><\/div>\n
\u00a0and add the extension with its full path:<\/p>\n
zend_extension=\/home\/cjones\/php55\/lib\/php\/extension\/debug-non-zts-20121212\/opcache.so<\/pre>\n
Update (25 March 2013): Dmitry\u00a0merged a PHP 5.5 change<\/a>\u00a0so that the full path is not required for\u00a0<\/p>\n
zend_extension<\/div><\/div>\n
libraries in the\u00a0<\/p>\n
extension_dir<\/div><\/div>\n
\u00a0directory. You can now simply do\u00a0<\/p>\n
zend_extension=opcache.so<\/div><\/div>\n
.<\/p>\n
You’ll want to enable OPcache too:<\/p>\n
opcache.enable=On<\/pre>\n
The\u00a0ext\/opcache\/README<\/a>\u00a0is the current source of documentation, and lists all the other\u00a0<\/p>\n
php.ini<\/div><\/div>\n
\u00a0parameters.<\/p>\n
Problems can be reported in the\u00a0Github issue tracker<\/a><\/p>\n
Update (18 March 2013): In\u00a0a commit over the weekend<\/a>, the build option\u00a0<\/p>\n
--enable-opcache<\/div><\/div>\n
\u00a0is On by default. You will still need to update php.ini.<\/p>\n
To build Zend OPcache for older versions of PHP:<\/b><\/p>\n
You should be able to build OPcache with PHP 5.2 onwards<\/p>\n
Install it by getting the source from\u00a0Github<\/a>. There is also a\u00a0PECL repository<\/a>; this is slightly out of date so I recommend using Github. Follow the README instructions to install it.<\/p>\n
User-data cache:<\/b><\/p>\n
The new opcode cache does not include a user-data cache. Joe Watkins recently started the\u00a0APCu project<\/a>\u00a0to extract the user-data cache code from APC. Test this too!<\/p>\n
Update 19 March 2013: Xinchen Hui is working on a lockless user-data cache, see\u00a0https:\/\/github.com\/laruence\/yac<\/a>\u00a0and his blog about it\u00a0here<\/a>\u00a0(in Chinese).<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
Zend have contributed their Zend Optimizer+ opcode cache to PHP – thanks Zend!!! (Update 19 March 2013: the renaming to “Zend OPcache” […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1797","post","type-post","status-publish","format-standard","hentry","category-info-on-tech"],"_links":{"self":[{"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/1797","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1797"}],"version-history":[{"count":0,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/1797\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1797"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1797"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1797"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}