{"id":7,"date":"2025-02-10T06:30:23","date_gmt":"2025-02-10T06:30:23","guid":{"rendered":"https:\/\/notes.cp2.techshu.in\/?p=7"},"modified":"2025-02-10T06:30:23","modified_gmt":"2025-02-10T06:30:23","slug":"php-fpm-configuration","status":"publish","type":"post","link":"https:\/\/notes.cp2.techshu.in\/?p=7","title":{"rendered":"PHP-FPM Configuration"},"content":{"rendered":"\n

Thanks for the clarification! Since the database server is separate<\/strong>, we can allocate more RAM to PHP-FPM<\/strong> because MySQL\/PostgreSQL isn\u2019t consuming memory on this server.<\/p>\n\n\n\n

\n\n\n\n

\ud83d\udd39 Adjusted PHP-FPM Configuration for 16GB RAM & 4 Cores<\/strong><\/h2>\n\n\n\n

Since the database is on a different server, we assume PHP-FPM, Apache\/Nginx, Redis, and OS services<\/strong> as the main consumers of memory.<\/p>\n\n\n\n

1\ufe0f\u20e3 Determine pm.max_children<\/code><\/strong><\/h3>\n\n\n\n

Formula:<\/strong><\/h4>\n\n\n\n
pm.max_children = (Total Available RAM - Reserved RAM) \/ Average PHP Process Size\n<\/code><\/pre>\n\n\n\n
    \n
  • Available RAM<\/strong>: 16GB<\/li>\n\n\n\n
  • Reserve for OS, Webserver, Cache, and Other Services<\/strong>: ~3GB<\/li>\n\n\n\n
  • PHP Process Size<\/strong>: ~100MB (Check with ps -ylC php-fpm8.2 --sort:rss | awk '{sum+=$8} END {print sum\/NR\/1024 \" MB\"}'<\/code>)<\/li>\n<\/ul>\n\n\n\n
    \ud83d\udca1 Calculation:<\/strong><\/p>\n\n\n\n
    (16GB - 3GB) \/ 100MB = 130\n<\/code><\/pre>\n\n\n\n
    \ud83d\udc49 Recommended: pm.max_children = 120<\/code> (keeping buffer)<\/strong><\/p>\n\n\n\n
    \n\n\n\n
    2\ufe0f\u20e3 Set pm.start_servers<\/code><\/strong><\/h3>\n\n\n\n
    Formula:<\/strong><\/h4>\n\n\n\n
    pm.start_servers = Total CPU Cores * 2\n<\/code><\/pre>\n\n\n\n
    For 4 cores<\/strong>:<\/p>\n\n\n\n
    pm.start_servers = 4 * 2 = 8\n<\/code><\/pre>\n\n\n\n
    \ud83d\udc49 If traffic is high, increase to 10-12<\/strong>.<\/p>\n\n\n\n
    \n\n\n\n
    3\ufe0f\u20e3 Set pm.min_spare_servers<\/code> & pm.max_spare_servers<\/code><\/strong><\/h3>\n\n\n\n
    Formula:<\/strong><\/h4>\n\n\n\n
    pm.min_spare_servers = pm.start_servers \/ 2\npm.max_spare_servers = pm.start_servers * 2\n<\/code><\/pre>\n\n\n\n
    For 10 start servers<\/strong>:<\/p>\n\n\n\n
    pm.min_spare_servers = 5\npm.max_spare_servers = 20\n<\/code><\/pre>\n\n\n\n
    \ud83d\udc49 Recommended:<\/strong><\/p>\n\n\n\n
    pm.min_spare_servers = 5\npm.max_spare_servers = 20\n<\/code><\/pre>\n\n\n\n
    \n\n\n\n
    4\ufe0f\u20e3 Set pm.process_idle_timeout<\/code><\/strong><\/h3>\n\n\n\n
      \n
    • For consistent traffic:<\/strong> Keep at 10s<\/strong> (default).<\/li>\n\n\n\n
    • For fluctuating traffic:<\/strong> Increase to 20-30s<\/strong> to avoid frequent process respawning.<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n
      \ud83d\udd25 Final PHP-FPM Configuration<\/strong><\/h2>\n\n\n\n
      pm = dynamic\npm.max_children = 120\npm.start_servers = 10\npm.min_spare_servers = 5\npm.max_spare_servers = 20\npm.process_idle_timeout = 10s\n<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      \ud83d\udcca Performance Monitoring<\/strong><\/h2>\n\n\n\n
      After applying the settings, restart PHP-FPM:<\/p>\n\n\n\n
      sudo systemctl restart php8.2-fpm\n<\/code><\/pre>\n\n\n\n
      Monitor CPU\/RAM usage:<\/p>\n\n\n\n
      htop\nfree -m\n<\/code><\/pre>\n\n\n\n
      Check PHP-FPM process usage:<\/p>\n\n\n\n
      ps aux | grep php-fpm\n<\/code><\/pre>\n\n\n\n
      Check logs for PHP-FPM activity:<\/p>\n\n\n\n
      sudo tail -f \/var\/log\/php8.2-fpm.log\n<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      \ud83d\udd04 Alternative: Use pm = ondemand<\/code> for Variable Load<\/strong><\/h2>\n\n\n\n
      If your traffic is unpredictable:<\/p>\n\n\n\n
      pm = ondemand\npm.max_children = 120\npm.process_idle_timeout = 20s\n<\/code><\/pre>\n\n\n\n
      This ensures PHP processes only run when needed<\/strong>, saving memory.<\/p>\n\n\n\n
      \n\n\n\n
      \ud83d\ude80 These settings should provide optimal performance for your setup! Try them and monitor for any needed tweaks. Let me know if you need further adjustments!<\/strong> \ud83c\udfaf<\/p>\n\n\n\n
      <\/p>\n","protected":false},"excerpt":{"rendered":"
      Thanks for the clarification! Since the database server is separate, we can allocate more RAM to PHP-FPM because MySQL\/PostgreSQL isn\u2019t consuming memory on this server. \ud83d\udd39 Adjusted PHP-FPM Configuration for 16GB RAM & 4 Cores Since the database is on a different server, we assume PHP-FPM, Apache\/Nginx, Redis, and OS services as the main consumers […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-7","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/notes.cp2.techshu.in\/index.php?rest_route=\/wp\/v2\/posts\/7","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/notes.cp2.techshu.in\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/notes.cp2.techshu.in\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/notes.cp2.techshu.in\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/notes.cp2.techshu.in\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7"}],"version-history":[{"count":1,"href":"https:\/\/notes.cp2.techshu.in\/index.php?rest_route=\/wp\/v2\/posts\/7\/revisions"}],"predecessor-version":[{"id":9,"href":"https:\/\/notes.cp2.techshu.in\/index.php?rest_route=\/wp\/v2\/posts\/7\/revisions\/9"}],"wp:attachment":[{"href":"https:\/\/notes.cp2.techshu.in\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/notes.cp2.techshu.in\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/notes.cp2.techshu.in\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}