{"id":4323,"date":"2023-03-27T16:13:55","date_gmt":"2023-03-27T10:43:55","guid":{"rendered":"https:\/\/devtechnosys.ae\/blog\/?p=4323"},"modified":"2023-05-17T18:40:41","modified_gmt":"2023-05-17T13:10:41","slug":"how-to-diagnose-out-of-memory-killed-php-fpm","status":"publish","type":"post","link":"https:\/\/devtechnosys.ae\/blog\/how-to-diagnose-out-of-memory-killed-php-fpm\/","title":{"rendered":"How to Diagnose Out of Memory Killed Php-fpm?"},"content":{"rendered":"<p>When a PHP script exceeds the memory limit set in the PHP configuration, it can cause the PHP FastCGI Process Manager (php-fpm) to run out of memory and crash, resulting in an &#8220;Out of memory&#8221; error or a &#8220;Killed&#8221; error message. To diagnose and resolve this issue, follow these steps:<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #000000;color:#000000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #000000;color:#000000\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/devtechnosys.ae\/blog\/how-to-diagnose-out-of-memory-killed-php-fpm\/#Step_1_Check_PHP_Configuration\" >Step 1: Check PHP Configuration<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/devtechnosys.ae\/blog\/how-to-diagnose-out-of-memory-killed-php-fpm\/#Step_2_Analyze_PHP_Script\" >Step 2: Analyze PHP Script<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/devtechnosys.ae\/blog\/how-to-diagnose-out-of-memory-killed-php-fpm\/#Step_3_Optimize_the_PHP_Script\" >Step 3: Optimize the PHP Script<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/devtechnosys.ae\/blog\/how-to-diagnose-out-of-memory-killed-php-fpm\/#Step_4_Monitor_System_Performance\" >Step 4: Monitor System Performance<\/a><\/li><\/ul><\/nav><\/div>\n\n<h2><span class=\"ez-toc-section\" id=\"Step_1_Check_PHP_Configuration\"><\/span><strong>Step 1: Check PHP Configuration<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Check the PHP configuration file (php.ini) to ensure that the memory limit is set high enough to accommodate the memory requirements of your PHP script. Locate the following line in php.ini:<\/p>\n<p>&nbsp;<\/p>\n<p><code>memory_limit = 128M<\/code><\/p>\n<p><code><!--?php \/\/ Debug statement to log memory usage error_log(memory_get_usage()); ?--><\/code><\/p>\n<p>Increase the value to a higher number, such as 256M or 512M, depending on the requirements of your PHP script. Save the file and restart php-fpm service.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Step_2_Analyze_PHP_Script\"><\/span><strong>Step 2: Analyze PHP Script<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Analyze the PHP script that is causing the issue to determine why it is using so much memory. This can be done by adding debug statements to the PHP script or using a profiler tool such as Xdebug to generate a memory usage report.<\/p>\n<p>&nbsp;<\/p>\n<p><code>&lt;?php<\/code><\/p>\n<p><code>\/\/ Debug statement to log memory usage<\/code><\/p>\n<p><code>error_log(memory_get_usage());<\/code><\/p>\n<p><code>?&gt;<\/code><\/p>\n<p>&nbsp;<\/p>\n<p>Use the debug statement in the relevant sections of the PHP script and observe the memory usage pattern during execution. This can help identify which part of the script is consuming the most memory.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Step_3_Optimize_the_PHP_Script\"><\/span><strong>Step 3: Optimize the PHP Script<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Once you have identified the section of the PHP script that is causing the memory issue, optimize it to reduce memory usage. Here are some general optimization techniques to consider:<\/p>\n<p>Unset unnecessary variables and objects to free up memory.<\/p>\n<p>Avoid loading large amounts of data into memory at once. Use pagination or chunking to process data in smaller batches. Use efficient algorithms and data structures to minimize memory usage. Use caching to reduce the need to regenerate data or query the database repeatedly.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Step_4_Monitor_System_Performance\"><\/span><strong>Step 4: Monitor System Performance<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Monitor the system performance to ensure that the changes made to the <a href=\"https:\/\/en.wikipedia.org\/wiki\/PHP\" target=\"_blank\" rel=\"noopener\">PHP<\/a> script have resolved the memory issue. Use monitoring tools such as top, htop, or Munin to monitor the CPU and memory usage of the server. This will help you determine if the changes made have improved the system&#8217;s overall performance.<\/p>\n<p>In conclusion, to diagnose and resolve an out-of-memory issue with PHP-FPM, check the PHP configuration, analyze the PHP script, optimize it, and monitor system performance. By following these steps, you can identify and fix the issue, and prevent it from happening in the future.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>When a PHP script exceeds the memory limit set in the PHP configuration, it can cause the PHP FastCGI Process Manager (php-fpm) to run out of memory and crash, resulting in an &#8220;Out of memory&#8221; error or a &#8220;Killed&#8221; error message. To diagnose and resolve this issue, follow these steps: Step 1: Check PHP Configuration Check the PHP configuration file&#8230;<\/p>\n","protected":false},"author":1,"featured_media":4350,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1,31,284,42],"tags":[289,34,705,706,297],"class_list":["post-4323","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","category-php-development","category-php-web-development","category-website-development","tag-hire-php-developer","tag-php-development","tag-php-news","tag-php-web-development-company","tag-php-web-development-services"],"acf":[],"_links":{"self":[{"href":"https:\/\/devtechnosys.ae\/blog\/wp-json\/wp\/v2\/posts\/4323","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devtechnosys.ae\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devtechnosys.ae\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devtechnosys.ae\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/devtechnosys.ae\/blog\/wp-json\/wp\/v2\/comments?post=4323"}],"version-history":[{"count":2,"href":"https:\/\/devtechnosys.ae\/blog\/wp-json\/wp\/v2\/posts\/4323\/revisions"}],"predecessor-version":[{"id":4346,"href":"https:\/\/devtechnosys.ae\/blog\/wp-json\/wp\/v2\/posts\/4323\/revisions\/4346"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devtechnosys.ae\/blog\/wp-json\/wp\/v2\/media\/4350"}],"wp:attachment":[{"href":"https:\/\/devtechnosys.ae\/blog\/wp-json\/wp\/v2\/media?parent=4323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devtechnosys.ae\/blog\/wp-json\/wp\/v2\/categories?post=4323"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devtechnosys.ae\/blog\/wp-json\/wp\/v2\/tags?post=4323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}