{"id":575286,"date":"2015-03-11T09:32:36","date_gmt":"2015-03-11T09:32:36","guid":{"rendered":"http:\/\/wpml.org\/?post_type=faq&p=575286"},"modified":"2024-08-01T07:29:19","modified_gmt":"2024-08-01T07:29:19","slug":"how-to-debug-performance-problems","status":"publish","type":"faq","link":"https:\/\/wpml.org\/zh-hans\/faq\/how-to-debug-performance-problems\/","title":{"rendered":"How can I debug performance problems?"},"content":{"rendered":"

You can debug performance problems by analyzing your database queries using a plugin like Debug Bar and its Sort Queries add-on.<\/p>\n

What is the Debug Bar plugin?<\/h2>\n

The Debug Bar <\/a>and Sort Queries add-on<\/a> lets you see a detailed breakdown of the queries running on every page of your site. By analyzing these queries, you can identify which pages slow down your site.<\/p>\n

How can I install the Debug Bar plugin?<\/h2>\n

You can install the Debug Bar<\/strong> plugin via the Plugins <\/strong>page in your WordPress admin.<\/p>\n

\"\"<\/a>
Installing the Debug Bar plugin<\/figcaption><\/figure>\n

To install the Sort Queries add-on, download its file<\/a> and upload it to your site.<\/p>\n

Disable Xdebug<\/h2>\n

If you’re using Xdebug, make sure to disable it before you start with performance testing. Xdebug will cause significant load on your server and alter the results.<\/p>\n

To disable Xdebug, remove the directive below from your php.ini<\/strong> file or conf.d\/xdebug.ini<\/strong>\u00a0file:<\/p>\n

zend_extension=xdebug.so<\/code><\/p>\n

This is how the phpinfo<\/strong> file should look like when Xdebug is not running:<\/p>\n

\"phpinfo<\/a>
phpinfo when Xdebug is not running (good for performance benchmarking)<\/figcaption><\/figure>\n

As soon as this does not contain any reference to Xdebug, you can be sure it\u2019s turned off.
\nWhether or not other sections of this phpinfo<\/strong> file contain references to Xdebug is not important, so long as it is not shown as a loaded extension at the top.<\/p>\n

How can I configure the Debug Bar?<\/h2>\n

The Debug Bar has a couple of debugging options:<\/p>\n