{"id":20340,"date":"2026-08-05T08:33:04","date_gmt":"2026-08-05T06:33:04","guid":{"rendered":"https:\/\/webhosting.de\/sysctl-tuning-webhosting-server-performance\/"},"modified":"2026-08-05T08:33:04","modified_gmt":"2026-08-05T06:33:04","slug":"sysctl-%e3%81%ab%e3%82%88%e3%82%8b%e3%82%a6%e3%82%a7%e3%83%96%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc%e3%81%ae%e3%83%91%e3%83%95%e3%82%a9%e3%83%bc","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/sysctl-tuning-webhosting-server-performance\/","title":{"rendered":"Web\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30b5\u30fc\u30d0\u30fc\u5411\u3051\u306esysctl\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\uff1aLinux\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3059\u308b"},"content":{"rendered":"<p>\u7684\u3092\u7d5e\u3063\u305f <strong>sysctl\u306e\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0<\/strong> \u3053\u308c\u306b\u3088\u308a\u3001\u63a5\u7d9a\u306e\u53d7\u3051\u5165\u308c\u7387\u3068\u51e6\u7406\u7387\u3092\u5411\u4e0a\u3055\u305b\u3001\u5fdc\u7b54\u6642\u9593\u3092\u77ed\u7e2e\u3057\u3001\u8ca0\u8377\u304c\u304b\u304b\u3063\u3066\u3044\u308b\u72b6\u614b\u3067\u3082Web\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30b5\u30fc\u30d0\u30fc\u3092\u78ba\u5b9f\u306b\u7a3c\u50cd\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001\u5177\u4f53\u7684\u306a\u30ab\u30fc\u30cd\u30eb\u30d1\u30e9\u30e1\u30fc\u30bf\u3001\u5b89\u5168\u306a\u30c6\u30b9\u30c8\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3001\u304a\u3088\u3073Apache\u3001Nginx\u3001PHP-FPM\u30b9\u30bf\u30c3\u30af\u3067\u79c1\u304c\u4f7f\u7528\u3057\u3066\u3044\u308b\u521d\u671f\u8a2d\u5b9a\u5024\u3092\u7d39\u4ecb\u3057\u3001 <strong>Linux\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/strong> \u30b9\u30e0\u30fc\u30ba\u306b\u62e1\u5f35\u3067\u304d\u308b\u3002.<\/p>\n\n<h2>\u4e2d\u5fc3\u70b9<\/h2>\n\n<ul>\n  <li><strong>\u307e\u305a\u306f\u5206\u6790\u304b\u3089<\/strong>: \u73fe\u72b6\u3092\u628a\u63e1\u3057\u3001\u6b63\u78ba\u306b\u8a18\u9332\u3057\u3001\u672c\u756a\u79fb\u884c\u524d\u306e\u30b9\u30c6\u30fc\u30b8\u30f3\u30b0\u74b0\u5883\u3067\u306e\u30c6\u30b9\u30c8\u3092\u5b9f\u65bd\u3059\u308b\u3002.<\/li>\n  <li><strong>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30ad\u30e5\u30fc<\/strong>: somaxconn\u3001tcp_max_syn_backlog\u3001\u304a\u3088\u3073 netdev_max_backlog \u3092\u3001\u30d4\u30fc\u30af\u6642\u306e\u8ca0\u8377\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u3088\u3046\u5f15\u304d\u4e0a\u3052\u308b\u3002.<\/li>\n  <li><strong>\u30e1\u30e2\u30ea<\/strong>: \u30b9\u30ef\u30c3\u30d7\u7387\u3001\u30c0\u30fc\u30c6\u30a3\u7387\u306e\u76ee\u5b89\u3001\u304a\u3088\u3073\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u8abf\u6574\u3057\u3066\u3001\u5fdc\u7b54\u6642\u9593\u3092\u77ed\u7e2e\u3059\u308b\u3002.<\/li>\n  <li><strong>\u9650\u754c<\/strong>: \u591a\u304f\u306e\u30ef\u30fc\u30ab\u30fc\u304c\u6b63\u5e38\u306b\u52d5\u4f5c\u3059\u308b\u3088\u3046\u306b\u3001fs.file-max \u3068 pid_max \u3092\u9069\u5207\u306b\u8a2d\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/li>\n  <li><strong>\u89b3\u5bdf\u3059\u308b<\/strong>: \u30ec\u30a4\u30c6\u30f3\u30b7\u3001\u30d0\u30c3\u30af\u30ed\u30b0\u3001\u30b9\u30ef\u30c3\u30d7\u3001\u30c9\u30ed\u30c3\u30d7\u3001\u304a\u3088\u3073\u30a8\u30e9\u30fc\u7387\u3092\u5fb9\u5e95\u7684\u306b\u6e2c\u5b9a\u3059\u308b\u3002.<\/li>\n<\/ul>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/08\/linux-server-optimierung-8374.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>sysctl\u306e\u8abf\u6574\u304c\u30a6\u30a7\u30d6\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u3092\u9ad8\u901f\u5316\u3059\u308b\u7406\u7531<\/h2>\n\n<p>\u79c1\u306f\u3001\u9ad8\u3044\u4e26\u5217\u6027\u4e0b\u3067Web\u30b5\u30fc\u30d0\u30fc\u304c\u52d5\u4f5c\u3059\u308b\u3088\u3046\u306b\u30ab\u30fc\u30cd\u30eb\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u8abf\u6574\u3057\u3066\u3044\u307e\u3059 <strong>\u30b3\u30cd\u30af\u30b7\u30e7\u30f3<\/strong> \u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3092\u9069\u5207\u306b\u884c\u3044\u3001\u51e6\u7406\u3092\u8fc5\u901f\u5316\u3059\u308b\u3002\u3053\u3046\u3057\u305f\u8abf\u6574\u3092\u884c\u308f\u306a\u3044\u3068\u3001\u30d0\u30c3\u30af\u30ed\u30b0\u304c\u6ea2\u308c\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u304c\u30ef\u30fc\u30ab\u30fc\u3092\u30d6\u30ed\u30c3\u30af\u3057\u3001\u5fdc\u7b54\u6642\u9593\u304c\u76ee\u306b\u898b\u3048\u3066\u9577\u304f\u306a\u308b\u3002\u30ad\u30e5\u30fc\u5236\u9650\u3092\u5f15\u304d\u4e0a\u3052\u3001\u9069\u5207\u306aTCP\u30d0\u30c3\u30d5\u30a1\u3092\u8a2d\u5b9a\u3057\u3001\u9069\u5207\u306a\u30ad\u30fc\u30d7\u30a2\u30e9\u30a4\u30d6\u9593\u9694\u3092\u8abf\u6574\u3059\u308b\u3053\u3068\u3067\u3001\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u3092\u77ed\u304f\u4fdd\u3061\u3001\u4e88\u6e2c\u53ef\u80fd\u306a\u72b6\u614b\u306b\u7dad\u6301\u3057\u3066\u3044\u308b\u3002 \u305d\u306e\u52b9\u679c\u306f\u3059\u3050\u306b\u5b9f\u611f\u3067\u304d\u307e\u3059\u3002SYN\u30c9\u30ed\u30c3\u30d7\u304c\u6e1b\u308a\u3001TLS\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u304c\u5b89\u5b9a\u3057\u3001\u518d\u9001\u4fe1\u3082\u6e1b\u5c11\u3057\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3057\u3066\u3001Web\u30b9\u30bf\u30c3\u30af\u306f\u305d\u306e\u6f5c\u5728\u80fd\u529b\u3092\u6700\u5927\u9650\u306b\u767a\u63ee\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u306e\u3067\u3059\u3002\u306a\u305c\u306a\u3089\u3001 <strong>\u30ab\u30fc\u30cd\u30eb<\/strong> \u4eba\u70ba\u7684\u306a\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u306f\u3082\u306f\u3084\u767a\u751f\u3057\u306a\u3044\u3002.<\/p>\n\n<h2>\u4f53\u7cfb\u5316\u3055\u308c\u305f\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\uff1a\u6e2c\u5b9a\u3001\u30c6\u30b9\u30c8\u3001\u9069\u7528<\/h2>\n\n<p>\u5909\u66f4\u3092\u884c\u3046\u524d\u306b\u306f\u3001\u5fc5\u305a\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3067\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u4fdd\u5b58\u3057\u3066\u3044\u307e\u3059\u3002 <code>sysctl -a<\/code> \u305d\u3057\u3066\u3001\u76ee\u7acb\u3064\u3082\u306e\u3092\u8a18\u9332\u3057\u3001 <strong>\u4fa1\u5024\u89b3<\/strong>. \u65b0\u3057\u3044\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u3001\u307e\u305a <code>sysctl -w<\/code> \u306b\u30ed\u30b0\u30a4\u30f3\u3057\u3001\u30b9\u30c6\u30fc\u30b8\u30f3\u30b0VM\u4e0a\u3067\u8ca0\u8377\u304c\u304b\u304b\u3063\u305f\u72b6\u614b\u3067\u306e\u30e1\u30c8\u30ea\u30af\u30b9\u3092\u76e3\u8996\u3057\u307e\u3059\u3002\u30ec\u30a4\u30c6\u30f3\u30b7\u3001\u30d1\u30b1\u30c3\u30c8\u30c9\u30ed\u30c3\u30d7\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u7387\u304c\u59a5\u5f53\u306a\u7bc4\u56f2\u5185\u306b\u306a\u3063\u305f\u3068\u78ba\u8a8d\u3067\u304d\u3066\u521d\u3081\u3066\u3001\u6052\u4e45\u7684\u306a\u8a2d\u5b9a\u3092\u66f8\u304d\u8fbc\u307f\u307e\u3059 <code>\/etc\/sysctl.d\/*.conf<\/code>. \u305d\u306e\u5f8c\u3001\u6b21\u306e\u3088\u3046\u306b\u5236\u5fa1\u3057\u306a\u304c\u3089\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002 <code>sysctl --system<\/code> \u307e\u305f\u3001\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u306b\u30de\u30fc\u30ab\u30fc\u3092\u8a2d\u5b9a\u3057\u3066\u3001\u526f\u4f5c\u7528\u3092\u691c\u77e5\u3057\u307e\u3059\u3002\u3053\u306e\u624b\u9806\u306b\u3088\u308a\u3001\u30ea\u30b9\u30af\u3092\u4f4e\u6e1b\u3057\u3001 <strong>\u30c8\u30ec\u30fc\u30b5\u30d3\u30ea\u30c6\u30a3<\/strong> \u3053\u308c\u306b\u3088\u308a\u3001\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u304c\u7c21\u5358\u306b\u884c\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/08\/linux_sysctl_tuning_mtng_3842.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u9ad8\u3044\u540c\u6642\u5b9f\u884c\u6027\u306b\u5bfe\u5fdc\u3057\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30ad\u30e5\u30fc<\/h2>\n\n<p>\u591a\u304f\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u540c\u6642\u306b\u554f\u3044\u5408\u308f\u305b\u3092\u3057\u3066\u304d\u3066\u3001 <strong>\u30a6\u30a7\u30d6\u30b5\u30fc\u30d0\u30fc<\/strong> \u4e00\u6642\u7684\u306b\u30d6\u30ed\u30c3\u30af\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u79c1\u306f <code>net.core.somaxconn<\/code>, \u3001\u3053\u308c\u306b\u3088\u308a\u3001\u3088\u308a\u591a\u304f\u306e\u7740\u4fe1\u63a5\u7d9a\u304c\u30ad\u30e5\u30fc\u306b\u683c\u7d0d\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308b\u3002\u4e26\u884c\u3057\u3066\u3001\u79c1\u306f <code>net.ipv4.tcp_max_syn_backlog<\/code>, \u3001TLS\u3084\u30dc\u30c3\u30c8\u306b\u3088\u308b\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u6025\u5897\u6642\u306b\u534a\u958b\u72b6\u614b\u306e\u63a5\u7d9a\u3092\u6355\u6349\u3059\u308b\u305f\u3081\u3067\u3059\u3002\u3055\u3089\u306b\u3001\u3088\u308a\u9ad8\u3044 <code>net.core.netdev_max_backlog<\/code>, \u3001\u30d1\u30b1\u30c3\u30c8\u304c\u30b9\u30bf\u30c3\u30af\u304c\u51e6\u7406\u3067\u304d\u308b\u901f\u5ea6\u3088\u308a\u3082\u901f\u304f\u5230\u7740\u3059\u308b\u5834\u5408\u3067\u3059\u3002\u3055\u3089\u306b\u8a73\u3057\u304f\u77e5\u308a\u305f\u3044\u65b9\u306f\u3001\u7c21\u6f54\u306a <a href=\"https:\/\/webhosting.de\/ja\/%e3%82%ab%e3%83%bc%e3%83%8d%e3%83%ab%e3%83%81%e3%83%a5%e3%83%bc%e3%83%8b%e3%83%b3%e3%82%b0linux-sysctl%e3%83%91%e3%83%a9%e3%83%a1%e3%83%bc%e3%82%bf%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc%e3%83%96\/\">\u4e3b\u8981\u306aSysctl\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u6982\u8981<\/a>, \u3001\u3053\u308c\u3092\u8d77\u70b9\u3068\u3057\u3066\u3001 <strong>\u30d4\u30fc\u30af<\/strong> \u5f3e\u529b\u6027\u3092\u4fdd\u3064\u3002.<\/p>\n\n<h2>TCP\u30d0\u30c3\u30d5\u30a1\u3068\u30a6\u30a3\u30f3\u30c9\u30a6\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u306e\u9069\u5207\u306a\u9078\u629e<\/h2>\n\n<p>\u4e26\u5217\u8ee2\u9001\u304c\u591a\u6570\u884c\u308f\u308c\u308b\u5834\u5408\u3001 <strong>tcp_rmem<\/strong> \u305d\u3057\u3066 <strong>tcp_wmem<\/strong> \u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3068\u30ec\u30a4\u30c6\u30f3\u30b7\u306b\u76f4\u63a5\u5f71\u97ff\u3057\u307e\u3059\u3002 \u79c1\u306f\u3001\u77ed\u3044\u5fdc\u7b54\u304c\u904e\u5927\u306a\u30d0\u30c3\u30d5\u30a1\u306b\u57cb\u3082\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u3064\u3064\u3001\u9577\u6642\u9593\u306e\u901a\u4fe1\u306b\u306f\u5341\u5206\u306a\u4f59\u88d5\u3092\u6301\u305f\u305b\u308b\u3088\u3046\u3001Min\/Default\/Max\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u91cd\u8981\u306a\u306e\u306f\u30a6\u30a3\u30f3\u30c9\u30a6\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3067\u3042\u308a\u3001\u3053\u308c\u3092\u884c\u308f\u306a\u3044\u3068\u3001RTT\u304c\u9ad8\u304f\u306a\u308b\u3068\u5e2f\u57df\u5e45\u304c\u65e9\u671f\u306b\u5236\u9650\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3068\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u306b\u95a2\u3059\u308b\u80cc\u666f\u77e5\u8b58\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u7c21\u6f54\u306a\u5b9f\u8df5\u8a18\u4e8b\u304c\u53c2\u8003\u306b\u306a\u308a\u307e\u3059\u3002 <a href=\"https:\/\/webhosting.de\/ja\/%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc-tcp-%e3%82%a6%e3%82%a4%e3%83%b3%e3%83%89%e3%82%a6%e3%83%bb%e3%82%b9%e3%82%b1%e3%83%bc%e3%83%aa%e3%83%b3%e3%82%b0-%e3%82%b9%e3%83%ab%e3%83%bc%e3%83%97%e3%83%83\/\">TCP\u30a6\u30a3\u30f3\u30c9\u30a6\u306e\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0<\/a>. \u30d0\u30c3\u30d5\u30a1\u3092\u9069\u5207\u306b\u8abf\u6574\u3059\u308b\u3053\u3068\u3067\u518d\u9001\u4fe1\u7387\u304c\u4f4e\u4e0b\u3057\u3001\u305d\u306e <strong>\u30b0\u30c3\u30c9\u30fb\u30d7\u30c3\u30c8<\/strong>\u2011\u8ca0\u8377\u304c\u304b\u304b\u3063\u3066\u3082\u30ab\u30fc\u30d6\u304c\u3088\u308a\u5b89\u5b9a\u3059\u308b\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/08\/linux-server-optimization-4578.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30e1\u30e2\u30ea\u7ba1\u7406\uff1a\u30b9\u30ef\u30c3\u30d7\u30cb\u30b9\u3001\u30c0\u30fc\u30c6\u30a3\u30da\u30fc\u30b8\u3001\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5<\/h2>\n\n<p>\u30b9\u30ef\u30c3\u30d7\u306fWeb\u30b5\u30fc\u30d3\u30b9\u306e\u52d5\u4f5c\u3092\u8457\u3057\u304f\u9045\u3089\u305b\u308b\u305f\u3081\u3001\u79c1\u306f\u3053\u308c\u3092\u6e1b\u3089\u3059\u3053\u3068\u306b\u3057\u305f <strong>vm.swappiness<\/strong> \u30ab\u30fc\u30cd\u30eb\u304cRAM\u3092\u3088\u308a\u9577\u304f\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u3057\u3070\u3057\u307010\uff5e20\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u66f8\u304d\u8fbc\u307f\u306e\u30d4\u30fc\u30af\u3092\u8abf\u6574\u3059\u308b\u305f\u3081\u306b <code>vm.dirty_ratio<\/code> \u305d\u3057\u3066 <code>vm.dirty_background_ratio<\/code>, \u3001\u3053\u308c\u306b\u3088\u308a\u3001\u5927\u898f\u6a21\u306a\u30d5\u30e9\u30c3\u30b7\u30e5\u306b\u3088\u3063\u3066I\/O\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u304c\u8a70\u307e\u308b\u306e\u3092\u9632\u304e\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u983b\u7e41\u306b\u884c\u308f\u308c\u308b\u5834\u5408\u306f\u3001\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u76e3\u8996\u3057\u3001Linux\u30ab\u30fc\u30cd\u30eb\u304c\u305d\u308c\u3092\u65e9\u3005\u306b\u8ffd\u3044\u51fa\u3055\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u30e1\u30e2\u30ea\u306e\u30d5\u30e9\u30c3\u30b7\u30e5\u5236\u5fa1\u306b\u3064\u3044\u3066\u3088\u308a\u6df1\u304f\u7406\u89e3\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u304c\u53c2\u8003\u306b\u306a\u308a\u307e\u3059\u3002 <a href=\"https:\/\/webhosting.de\/ja\/%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc%e3%83%bb%e3%83%9a%e3%83%bc%e3%82%b8%e3%83%bb%e3%82%ad%e3%83%a3%e3%83%83%e3%82%b7%e3%83%a5%e9%80%80%e9%81%bflinux%e3%83%a1%e3%83%a2%e3%83%aa%e5%8d%b0%e5%88%b7\/\">\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u8ffd\u3044\u51fa\u3057<\/a>. .\u3060\u304b\u3089\u3001\u79c1\u306f <strong>\u5fdc\u7b54\u6642\u9593<\/strong> \u8981\u3059\u308b\u306b\u3001Cron\u30b8\u30e7\u30d6\u3084\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3001\u30e1\u30c7\u30a3\u30a2\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u304c\u5b9f\u884c\u4e2d\u3067\u3042\u3063\u3066\u3082\u3002.<\/p>\n\n<h2>\u30d5\u30a1\u30a4\u30eb\u30cf\u30f3\u30c9\u30eb\u3068\u30d7\u30ed\u30bb\u30b9\u5236\u9650\uff1afs.file-max \u304a\u3088\u3073 pid_max<\/h2>\n\n<p>\u591a\u304f\u306e\u4eee\u60f3\u30db\u30b9\u30c8\u3001PHP-FPM\u30d7\u30fc\u30eb\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3001\u304a\u3088\u3073\u30bd\u30b1\u30c3\u30c8\u306b\u306f\u3001\u5341\u5206\u306a <strong>\u30d5\u30a1\u30a4\u30eb\u8a18\u8ff0\u5b50<\/strong>. \u305d\u3053\u3067\u3001\u79c1\u306f\u5897\u984d\u3057\u307e\u3059 <code>fs.file-max<\/code> \u30ed\u30b0\u3001\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3001TLS\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u969b\u306b\u30b9\u30d1\u30a4\u30af\u304c\u767a\u751f\u3057\u3066\u3082\u5236\u9650\u3092\u8d85\u3048\u306a\u3044\u3088\u3046\u3001\u4f59\u88d5\u3092\u6301\u305f\u305b\u3066\u3044\u307e\u3059\u3002\u30ef\u30fc\u30ab\u30fc\u30d7\u30ed\u30bb\u30b9\u304c\u591a\u6570\u5b58\u5728\u3059\u308b\u74b0\u5883\u3067\u306f\u3001\u79c1\u306f <code>\u30ab\u30fc\u30cd\u30eb.pid_max<\/code> \u30d7\u30ed\u30bb\u30b9ID\u306e\u7af6\u5408\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u9ad8\u304f\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u30b5\u30fc\u30d3\u30b9\u5236\u9650\uff08\u4f8b\uff1a. <code>\u30ea\u30df\u30c3\u30c8NOFILE<\/code> \uff08systemd\u5185\uff09\u3067\u3001\u30ab\u30fc\u30cd\u30eb\u306e\u8a2d\u5b9a\u5909\u66f4\u304c\u30b5\u30fc\u30d3\u30b9\u5074\u306b\u3082\u53cd\u6620\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u7c21\u5358\u306a\u8abf\u6574\u306b\u3088\u308a\u3001 <strong>\u30a8\u30e9\u30fc<\/strong> \u300c\u958b\u3044\u3066\u3044\u308b\u30d5\u30a1\u30a4\u30eb\u304c\u591a\u3059\u304e\u307e\u3059\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u3068\u540c\u69d8\u306b\u3001\u78ba\u5b9f\u306b\u767a\u751f\u3057\u307e\u3059\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/08\/sysctl_tuning_linux_server_8239.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u53c2\u8003\u3068\u306a\u308b\u76ee\u5b89\u306e\u6982\u8981<\/h2>\n\n<p>\u6b21\u306e\u8868\u306f\u3001\u672c\u756a\u74b0\u5883\u306b\u8fd1\u3044\u30db\u30b9\u30c8\u4e0a\u3067\u5b9f\u969b\u306e <strong>\u8ca0\u8377<\/strong> \u691c\u8a3c\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u5b9f\u969b\u306e\u6e2c\u5b9a\u306b\u4ee3\u308f\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u624b\u3063\u53d6\u308a\u65e9\u304f\u59cb\u3081\u308b\u306b\u306f\u5f79\u7acb\u3061\u307e\u3059\u3002 \u63a7\u3048\u3081\u306a\u8a2d\u5b9a\u304b\u3089\u59cb\u3081\u3066\u6bb5\u968e\u7684\u306b\u5024\u3092\u5f15\u304d\u4e0a\u3052\u3066\u3044\u3051\u3070\u3001\u30ea\u30b9\u30af\u3092\u4f4e\u6e1b\u3057\u3001\u526f\u4f5c\u7528\u3092\u3088\u308a\u65e9\u304f\u628a\u63e1\u3067\u304d\u307e\u3059\u3002\u79c1\u306f\u5909\u66f4\u306e\u305f\u3073\u306b\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u3001\u30d1\u30b1\u30c3\u30c8\u30c9\u30ed\u30c3\u30d7\u3001\u518d\u9001\u4fe1\u3001\u30b9\u30ef\u30c3\u30d7\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002\u50be\u5411\u304c\u9069\u5207\u3067\u3042\u308c\u3070\u3001\u305d\u306e\u5024\u3092\u79c1\u306e <strong>\u57fa\u672c\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb<\/strong>.<\/p>\n\n<table>\n  <thead>\n    <tr>\n      <th>\u30d1\u30e9\u30e1\u30fc\u30bf<\/th>\n      <th>\u52b9\u679c<\/th>\n      <th>\u958b\u59cb\u5024<\/th>\n      <th>\u5099\u8003<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>net.core.somaxconn<\/td>\n      <td>\u65b0\u898f\u63a5\u7d9a\u306e\u5f85\u6a5f\u5217<\/td>\n      <td>65535<\/td>\n      <td>Web\u30b5\u30fc\u30d0\u30fc\u306e\u30d0\u30c3\u30af\u30ed\u30b0\u3068\u7167\u5408\u3059\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>net.ipv4.tcp_max_syn_backlog<\/td>\n      <td>\u534a\u958b\u72b6\u614b\u306eTCP\u63a5\u7d9a<\/td>\n      <td>4096<\/td>\n      <td>TLS\/\u30dc\u30c3\u30c8\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u6025\u5897\u6642\u306e\u5bfe\u7b56\u306b\u5f79\u7acb\u3061\u307e\u3059<\/td>\n    <\/tr>\n    <tr>\n      <td>net.core.netdev_max_backlog<\/td>\n      <td>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u30bf\u30c3\u30af\u306e\u524d\u6bb5\u306b\u3042\u308b\u30d0\u30c3\u30d5\u30a1<\/td>\n      <td>16384<\/td>\n      <td>NIC\/IRQ\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u6ce8\u610f\u3059\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>net.ipv4.tcp_rmem<\/td>\n      <td>\u53d7\u4fe1\u30d0\u30c3\u30d5\u30a1\uff08\u6700\u5c0f\/\u65e2\u5b9a\u5024\/\u6700\u5927\uff09<\/td>\n      <td>4096 87380 134217728<\/td>\n      <td>RTT\/\u5e2f\u57df\u5e45\u306e\u30c6\u30b9\u30c8<\/td>\n    <\/tr>\n    <tr>\n      <td>net.ipv4.tcp_wmem<\/td>\n      <td>\u9001\u4fe1\u30d0\u30c3\u30d5\u30a1\uff08\u6700\u5c0f\uff0f\u65e2\u5b9a\uff0f\u6700\u5927\uff09<\/td>\n      <td>4096 65536 134217728<\/td>\n      <td>\u30a6\u30a3\u30f3\u30c9\u30a6\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3092\u8003\u616e\u3059\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>vm.swappiness<\/td>\n      <td>\u30b9\u30ef\u30c3\u30d7\u50be\u5411<\/td>\n      <td>10<\/td>\n      <td>RAM\u306e\u5bb9\u91cf\u306b\u5408\u308f\u305b\u3066\u8abf\u6574\u3059\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>vm.dirty_ratio<\/td>\n      <td>\u30da\u30f3\u5148\u306e\u5148\u3092\u6ed1\u3089\u304b\u306b\u3059\u308b<\/td>\n      <td>10\u201315<\/td>\n      <td>IO\u8ca0\u8377\u3092\u628a\u63e1\u3057\u3066\u304a\u304f<\/td>\n    <\/tr>\n    <tr>\n      <td>fs.file-max<\/td>\n      <td>\u30b0\u30ed\u30fc\u30d0\u30eb\u30d5\u30a1\u30a4\u30eb\u30cf\u30f3\u30c9\u30eb<\/td>\n      <td>500000<\/td>\n      <td>\u30b5\u30fc\u30d3\u30b9\u5236\u9650\u306e\u8abf\u6574<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30ab\u30fc\u30cd\u30eb.pid_max<\/td>\n      <td>\u6700\u5927\u30d7\u30ed\u30bb\u30b9ID\u6570<\/td>\n      <td>4194304<\/td>\n      <td>\u9ad8\u3044\u30db\u30b9\u30c8\u5bc6\u5ea6\u3092\u78ba\u4fdd\u3059\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>net.ipv4.tcp_keepalive_time<\/td>\n      <td>\u30a2\u30a4\u30c9\u30eb\u72b6\u614b\u304b\u3089\u30ad\u30fc\u30d7\u30a2\u30e9\u30a4\u30d6\u307e\u3067<\/td>\n      <td>600<\/td>\n      <td>\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\uff0f\u30d7\u30ed\u30ad\u30b7\u306e\u30dd\u30ea\u30b7\u30fc\u3092\u78ba\u8a8d\u3059\u308b<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<p>\u3053\u308c\u3089\u306e\u521d\u671f\u5024\u306f\u3001\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u3001\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u69cb\u6210\u3001\u304a\u3088\u3073\u30b9\u30bf\u30c3\u30af\u306b\u5fdc\u3058\u3066\u8abf\u6574\u3057\u3001 <strong>\u30ea\u30bd\u30fc\u30b9<\/strong> \u9069\u5207\u306b\u6d3b\u7528\u3055\u308c\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5c0f\u898f\u6a21\u306aVPS\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u591a\u304f\u306e\u5834\u5408\u3001\u4e0a\u9650\u5024\u3092\u4f4e\u304f\u8a2d\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u5c02\u7528\u30db\u30b9\u30c8\u3067\u306f\u3088\u308a\u9ad8\u3044\u5024\u306b\u8a2d\u5b9a\u3057\u3066\u3082\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002RTT\u304c\u9ad8\u304f\u5e2f\u57df\u5e45\u304c\u5e83\u3044\u5834\u5408\u306f\u6700\u5927\u30d0\u30c3\u30d5\u30a1\u3092\u5897\u3084\u3057\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u304c\u91cd\u8981\u306aAPI\u3067\u306f\u9069\u5ea6\u306a\u5024\u306b\u6291\u3048\u307e\u3059\u3002 \u91cd\u8981\u306a\u306e\u306f\u3001\u95a2\u9023\u3059\u308b\u6307\u6a19\u3092\u7d99\u7d9a\u7684\u306b\u6e2c\u5b9a\u3057\u7d9a\u3051\u308b\u3053\u3068\u3067\u3059\u3002\u6e2c\u5b9a\u53ef\u80fd\u3067\u6539\u5584\u304c\u898b\u3089\u308c\u308b\u3082\u306e\u3060\u3051\u304c\u3001\u9577\u671f\u7684\u306b <strong>\u30bb\u30c3\u30c6\u30a3\u30f3\u30b0<\/strong>.<\/p>\n\n<h2>\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u5f8c\u306e\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\uff1a\u6e2c\u5b9a\u9805\u76ee<\/h2>\n\n<p>\u5909\u66f4\u3092\u884c\u3046\u305f\u3073\u306b\u3001\u307e\u305a <strong>\u30a6\u30a7\u30d6\u30b5\u30fc\u30d0\u30fc<\/strong>. \u6b21\u306b\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u304a\u3051\u308bTCP\u518d\u9001\u4fe1\u3001\u9806\u4e0d\u540c\u30d1\u30b1\u30c3\u30c8\u3001\u304a\u3088\u3073\u30c9\u30ed\u30c3\u30d7\u7387\u3092\u6e2c\u5b9a\u3057\u307e\u3059\u3002\u3055\u3089\u306b\u3001CPU\u30b9\u30c6\u30a3\u30fc\u30eb\u3001\u30e9\u30f3\u30ad\u30e5\u30fc\u306e\u9577\u3055\u3001IO\u5f85\u6a5f\u6642\u9593\u3092\u76e3\u8996\u3057\u3001\u771f\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3092\u7279\u5b9a\u3057\u307e\u3059\u3002 \u30e1\u30e2\u30ea\u306b\u95a2\u3057\u3066\u306f\u3001\u30da\u30fc\u30b8\u30d5\u30a9\u30fc\u30eb\u30c8\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u30d2\u30c3\u30c8\u3001\u30b9\u30ef\u30c3\u30d7\u30a4\u30f3\uff0f\u30a2\u30a6\u30c8\u306b\u6ce8\u76ee\u3057\u3066\u3044\u307e\u3059\u3002\u8907\u6570\u306e\u8ca0\u8377\u30a6\u30a3\u30f3\u30c9\u30a6\u306b\u308f\u305f\u3063\u3066\u50be\u5411\u304c\u4e00\u81f4\u3057\u3066\u521d\u3081\u3066\u3001\u305d\u306e\u539f\u56e0\u3092\u8aac\u660e\u3067\u304d\u308b\u306e\u3067\u3059\u3002 <strong>\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0<\/strong> \u6210\u529f\u3057\u305f\u3068\u8a00\u3048\u308b\u3002.<\/p>\n\n<h2>\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3068Web\u30b5\u30fc\u30d0\u30fc\u30b9\u30bf\u30c3\u30af\uff1aNginx\u3001Apache\u3001PHP-FPM<\/h2>\n\n<p>Nginx\u306f\u9ad8\u3044 <strong>\u63a5\u7d9a\u6570<\/strong>, \u3001\u30ab\u30fc\u30cd\u30eb\u30ad\u30e5\u30fc\u3084\u30d0\u30c3\u30d5\u30a1\u3092\u8003\u616e\u306b\u5165\u308c\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002Apache\u306e\u5834\u5408\u3001MPM\u306e\u9078\u629e\u304c\u5927\u304d\u306a\u8981\u56e0\u3068\u306a\u308b\uff1akeepalive\u3092\u591a\u7528\u3059\u308b\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u591a\u3044\u74b0\u5883\u3067\u306f\u3001prefork\u3088\u308a\u3082event\u306e\u65b9\u304c\u826f\u597d\u306b\u52d5\u4f5c\u3059\u308b\u3002PHP-FPM\u306f\u5341\u5206\u306a\u30d5\u30a1\u30a4\u30eb\u30cf\u30f3\u30c9\u30eb\u3068\u30d7\u30ed\u30bb\u30b9\u3092\u5fc5\u8981\u3068\u3059\u308b\u304c\u3001\u30ab\u30fc\u30cd\u30eb\u30d0\u30c3\u30d5\u30a1\u304c\u4e0a\u9650\u3092\u8d85\u3048\u306a\u3051\u308c\u3070\u3001\u4f4e\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u7dad\u6301\u3067\u304d\u308b\u3002 \u79c1\u306f\u3001Web\u30b5\u30fc\u30d0\u30fc\u3001PHP-FPM\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3001\u30ab\u30fc\u30cd\u30eb\u9593\u306e\u5236\u9650\u3092\u8abf\u6574\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u76f8\u4e92\u9023\u643a\u304c\u3042\u3063\u3066\u521d\u3081\u3066\u3001\u5f85\u3061\u884c\u5217\u306e\u767a\u751f\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3057\u3066\u3001\u30b9\u30bf\u30c3\u30af\u306f\u65e2\u5b58\u306e <strong>\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2<\/strong> \u4e92\u3044\u306b\u8db3\u3092\u5f15\u3063\u5f35\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u52b9\u7387\u7684\u306b\u3002.<\/p>\n\n<h2>\u5c55\u958b\u6226\u7565\u3068\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\uff1a\u57fa\u672c\u578b vs. \u7279\u6b8a\u578b<\/h2>\n\n<p>\u79c1\u306f\u4fdd\u5b88\u7684\u306a\u59ff\u52e2\u3092\u3068\u3063\u3066\u3044\u308b <strong>\u57fa\u672c\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb<\/strong> \u7d99\u7d9a\u7684\u306a\u904b\u7528\u306b\u9069\u3057\u305f\u4f59\u88d5\u306e\u3042\u308b\u8a2d\u5b9a\u5024\u3092\u63a1\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u30c7\u30fc\u30bf\u51e6\u7406\u91cf\u306e\u591a\u3044\u30b7\u30e7\u30c3\u30d7\u3084\u3001\u591a\u6570\u306e\u30ef\u30fc\u30ab\u30fc\u3092\u62b1\u3048\u308bFPM\u30d7\u30fc\u30eb\u3001API\u30ce\u30fc\u30c9\u306a\u3069\u306b\u5bfe\u3057\u3066\u306f\u3001\u8ffd\u52a0\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u3066\u3044\u307e\u3059\u3002\u5909\u66f4\u5185\u5bb9\u306f\u69cb\u6210\u7ba1\u7406\u3092\u901a\u3058\u3066\u30b9\u30c6\u30fc\u30b8\u30f3\u30b0\u74b0\u5883\u306b\u53cd\u6620\u3055\u308c\u3001\u8ca0\u8377\u30c6\u30b9\u30c8\u3092\u7d4c\u3066\u3001\u305d\u306e\u5f8c\u3067\u672c\u756a\u74b0\u5883\u306b\u5c55\u958b\u3055\u308c\u307e\u3059\u3002 \u30db\u30b9\u30c8\u30ed\u30fc\u30eb\u3054\u3068\u306e\u9055\u3044\u3092\u6587\u66f8\u5316\u3057\u3001\u660e\u78ba\u306a\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u7b56\u3092\u7528\u610f\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u5fb9\u5e95\u3057\u305f\u7ba1\u7406\u306b\u3088\u308a\u3001\u30c0\u30a6\u30f3\u30bf\u30a4\u30e0\u3092\u9632\u304e\u3001\u5f8c\u306e <strong>\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9<\/strong> \u304b\u306a\u308a\u8efd\u304f\u306a\u308b\u3002.<\/p>\n\n<h2>\u30ad\u30fc\u30d7\u30a2\u30e9\u30a4\u30d6\u3068\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\uff1a\u30ea\u30bd\u30fc\u30b9\u3092\u8fc5\u901f\u306b\u89e3\u653e\u3059\u308b<\/h2>\n\n<p>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30fb\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u3067\u306f\u3001\u79c1\u306f <strong>\u30ad\u30fc\u30d7\u30a2\u30e9\u30a4\u30d6<\/strong> \u30be\u30f3\u30d3\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u9632\u3050\u305f\u3081\u3001\u4fdd\u5b88\u7684\u306a\u8a2d\u5b9a\u306b\u3057\u3066\u3044\u307e\u3059\u3002. <code>net.ipv4.tcp_keepalive_time<\/code>, <code>_intvl<\/code> \u305d\u3057\u3066 <code>_\u30d7\u30ed\u30fc\u30d6<\/code> \u975e\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u63a5\u7d9a\u304c\u901f\u3084\u304b\u306b\u5207\u65ad\u3055\u308c\u308b\u3088\u3046\u8a2d\u5b9a\u3092\u8abf\u6574\u3057\u3066\u3044\u307e\u3059\u3002 \u30d7\u30ed\u30ad\u30b7\u3084\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u30fc\u306e\u80cc\u5f8c\u3067\u3001\u30b5\u30fc\u30d0\u30fc\u3068\u30a2\u30c3\u30d7\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3092\u8abf\u6574\u3057\u3001\u8ab0\u3082\u4eba\u70ba\u7684\u306b\u63a5\u7d9a\u3092\u7dad\u6301\u3067\u304d\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3092\u77ed\u304f\u3059\u308b\u3053\u3068\u3067\u3001\u5b9f\u969b\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u9060\u3056\u3051\u308b\u3053\u3068\u306a\u304f\u3001\u30e1\u30e2\u30ea\u3084FD\u3078\u306e\u8ca0\u8377\u3092\u8efd\u6e1b\u3067\u304d\u307e\u3059\u3002\u91cd\u8981\u306a\u306e\u306f\u3001CDN\u3084 <strong>\u30ef\u30d5<\/strong>\u2015\u2015\u8ab0\u306e\u6c17\u5206\u3082\u5bb3\u3055\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u306e\u6307\u91dd\u3002.<\/p>\n\n<h2>\u5b9f\u8df5\u30d6\u30eb\u30fc\u30d7\u30ea\u30f3\u30c8\uff1a\u5909\u66f4\u3092\u78ba\u5b9f\u306b\u5c0e\u5165\u3059\u308b<\/h2>\n\n<p>\u307e\u305a\u306f\u8a66\u9a13\u7684\u306b\u3001\u6570\u304c\u5c11\u306a\u304f\u3001\u89b3\u5bdf\u3057\u3084\u3059\u3044\u3082\u306e\u304b\u3089\u59cb\u3081\u3066\u307f\u307e\u3059 <strong>\u30d1\u30e9\u30e1\u30fc\u30bf<\/strong> \u305d\u3057\u3066\u3001\u4e0a\u6607\u50be\u5411\u304c\u78ba\u8a8d\u3055\u308c\u3066\u304b\u3089\u521d\u3081\u3066\u30dd\u30b8\u30b7\u30e7\u30f3\u3092\u62e1\u5927\u3059\u308b\u3002\u4e00\u6642\u7684\u306b\uff1a <code>sysctl -w net.core.somaxconn=65535<\/code>, <code>sysctl -w net.ipv4.tcp_max_syn_backlog=4096<\/code>, <code>sysctl -w vm.swappiness=10<\/code>. \u666e\u6bb5\u306f\u3053\u308c\u3092 <code>\/etc\/sysctl.d\/99-hosting.conf<\/code> \u305d\u3057\u3066\u3001\u4ee5\u4e0b\u3067\u8aad\u307f\u8fbc\u307f\u307e\u3059 <code>sysctl --system<\/code>. \u526f\u4f5c\u7528\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u3001\u9078\u629e\u7684\u306b\u5143\u306b\u623b\u3057\u3001\u6240\u898b\u3001\u6307\u6a19\u3001\u767a\u751f\u6642\u523b\u3092\u8a18\u9332\u3057\u307e\u3059\u3002\u3053\u306e\u5c0f\u3055\u306a <strong>\u30d7\u30ed\u30bb\u30b9<\/strong> \u30b7\u30b9\u30c6\u30e0\u3092\u30af\u30ea\u30fc\u30f3\u306a\u72b6\u614b\u306b\u4fdd\u3061\u3001\u76e3\u67fb\u53ef\u80fd\u306a\u72b6\u614b\u306b\u3057\u307e\u3059\u3002.<\/p>\n\n<h2>\u6e0b\u6ede\u7ba1\u7406\u3068\u5217\u306e\u79e9\u5e8f\uff1aBBR\u3001CUBIC\u3001fq<\/h2>\n\n<p>\u30d0\u30c3\u30d5\u30a1\u306b\u52a0\u3048\u3001\u79c1\u306f\u610f\u56f3\u7684\u306b\u30c7\u30fc\u30bf\u84c4\u7a4d\u5236\u5fa1\u3068\u30d1\u30b1\u30c3\u30c8\u30b9\u30b1\u30b8\u30e5\u30fc\u30ea\u30f3\u30b0\u306b\u3064\u3044\u3066\u6c7a\u5b9a\u3092\u4e0b\u3057\u3066\u3044\u307e\u3059\u3002 <code>net.ipv4.tcp_congestion_control<\/code> CUBIC\uff08\u591a\u304f\u306e\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\uff09\u3092\u9078\u629e\u3059\u308b\u304b\u3001RTT\u304c\u9577\u3044\u3001\u3042\u308b\u3044\u306f\u5e2f\u57df\u5e45\u306e\u5909\u52d5\u304c\u6fc0\u3057\u3044\u30db\u30b9\u30c8\u3067\u306f\u3001BBR\u3092\u610f\u56f3\u7684\u306b\u30c6\u30b9\u30c8\u3057\u307e\u3059\u3002\u305d\u306e\u969b\u3001\u9069\u5207\u306a\u30ad\u30e5\u30fc\u30fb\u30c7\u30a3\u30b7\u30d7\u30ea\u30f3\u30fb\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002 <code>net.core.default_qdisc=fq<\/code> \u79c1\u306f\u3001\u77ed\u3044\u5fdc\u7b54\u3084\u591a\u6570\u306e\u540c\u6642\u30d5\u30ed\u30fc\u3092\u30b9\u30e0\u30fc\u30ba\u306b\u51e6\u7406\u3067\u304d\u308b\u300cPacing\u300d\u6a5f\u80fd\u4ed8\u304d\u306eFlow-Queuing\u3092\u6709\u52b9\u306b\u3057\u307e\u3059\u3002BBR\u306e\u6709\u7121\u3067\u516c\u5e73\u6027\uff08p50\/p99\u30ec\u30a4\u30c6\u30f3\u30b7\uff09\u3068\u30b0\u30c3\u30c9\u30d7\u30c3\u30c8\u3092\u6e2c\u5b9a\u3057\u3001\u30df\u30c9\u30eb\u30dc\u30c3\u30af\u30b9\u3084\u65e7\u578b\u6a5f\u5668\u306e\u53cd\u5fdc\u306b\u7570\u5e38\u304c\u898b\u3089\u308c\u308b\u5834\u5408\u306f\u3001\u4fdd\u5b88\u7684\u306a\u8a2d\u5b9a\u3092\u7dad\u6301\u3057\u307e\u3059\u3002 \u30ec\u30a4\u30c6\u30f3\u30b7\u304c\u91cd\u8981\u306aAPI\u306b\u3064\u3044\u3066\u306f\u3001fq+cubic\u304c\u5805\u7262\u306a\u51fa\u767a\u70b9\u3068\u3057\u3066\u3057\u3070\u3057\u3070\u6709\u52b9\u3067\u3042\u308b\u3053\u3068\u304c\u5b9f\u8a3c\u3055\u308c\u3066\u3044\u307e\u3059\u3002BBR\u306b\u3064\u3044\u3066\u306f\u3001\u5e83\u7bc4\u56f2\u306b\u5c55\u958b\u3059\u308b\u524d\u306b\u3001\u307e\u305a\u5c11\u6570\u306e\u30ce\u30fc\u30c9\u3067\u6bb5\u968e\u7684\u306b\u8a66\u9a13\u904b\u7528\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/08\/sysctl_tuning_8910.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>UDP\/QUIC \u304a\u3088\u3073 HTTP\/3\uff1aUDP \u30d0\u30c3\u30d5\u30a1\u306e\u9069\u5207\u306a\u30b5\u30a4\u30ba\u8a2d\u5b9a<\/h2>\n\n<p>HTTP\/3\/QUIC\u3092\u63d0\u4f9b\u3059\u308b\u5834\u5408\u306f\u3001UDP\u3092\u660e\u78ba\u306b\u8003\u616e\u3059\u3079\u304d\u3067\u3059\u3002\u79c1\u306f <code>net.core.rmem_max<\/code> \u305d\u3057\u3066 <code>net.core.wmem_max<\/code> QUIC\u30bd\u30b1\u30c3\u30c8\u304c\u9ad8\u30d3\u30c3\u30c8\u30ec\u30fc\u30c8\u6642\u306b\u4eba\u70ba\u7684\u306b\u5236\u9650\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u540c\u6642\u306b\u3001 <code>net.ipv4.udp_mem<\/code> \u304a\u3088\u3073\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30d0\u30c3\u30d5\u30a1\uff08<code>net.core.rmem_default<\/code>, <code>net.core.wmem_default<\/code>) \u3092\u9069\u5ea6\u306b\u8a2d\u5b9a\u3059\u308b\u3002\u76ee\u6a19\u306f\u3001\u30d0\u30fc\u30b9\u30c8\u304c\u30c9\u30ed\u30c3\u30d7\u3057\u306a\u3044\u3088\u3046\u5341\u5206\u306a\u30d0\u30c3\u30d5\u30a1\u3092\u78ba\u4fdd\u3057\u3064\u3064\u3001\u30e1\u30e2\u30ea\u3092\u904e\u5270\u306b\u6d88\u8cbb\u3059\u308b\u3088\u3046\u306a\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3060\u3002qdisc \u3068\u3057\u3066 fq \u3092\u4f7f\u7528\u3059\u308b\u3068\u3001UDP \u306e\u30da\u30fc\u30b7\u30f3\u30b0\u306b\u3082\u5f79\u7acb\u3064\u3002NIC \u30ad\u30e5\u30fc\u3067\u306e\u30c9\u30ed\u30c3\u30d7\u304c\u7279\u306b\u91cd\u8981\u3067\u3042\u308b\u305f\u3081\u3001\u79c1\u306f\u4ee5\u4e0b\u3092\u78ba\u8a8d\u3057\u3066\u3044\u308b\u3002 <code>netdev_max_backlog<\/code>, \u3001\u30ab\u30fc\u30c9\u306b\u95a2\u3059\u308bIRQ\u8ca0\u8377\u304a\u3088\u3073GRO\/TSO\u8a2d\u5b9a\u3002\u8ca0\u8377\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u3092\u78ba\u8a8d\u3057\u307e\u3059 <em>\u30a8\u30e9\u30fc\u3092\u53d7\u4fe1\u3059\u308b<\/em> \u304a\u3088\u3073UDP\u30c9\u30ed\u30c3\u30d7\u30ab\u30a6\u30f3\u30bf\u30fc\u3092\u4f7f\u7528\u3057\u3066\u3001\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3092\u65e9\u671f\u306b\u691c\u77e5\u3057\u307e\u3059\u3002.<\/p>\n\n<h2>\u4e00\u6642\u30dd\u30fc\u30c8\u3001TIME-WAIT\u3001\u304a\u3088\u3073FIN\u306e\u51e6\u7406<\/h2>\n\n<p>\u767a\u4fe1\u63a5\u7d9a\u304c\u591a\u3044\u3068\u3001\u30dd\u30fc\u30c8\u306e\u5272\u308a\u5f53\u3066\u304c\u3059\u3050\u306b\u903c\u8feb\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u79c1\u306f <code>net.ipv4.ip_local_port_range<\/code> \uff08\u4f8b\uff1a10000\uff5e65535\uff09\u306b\u8a2d\u5b9a\u3057\u3001\u77ed\u7e2e\u3059\u308b <code>net.ipv4.tcp_fin_timeout<\/code> \u614e\u91cd\u306b\uff08\u4f8b\uff1a30\u79d2\uff09\u8a2d\u5b9a\u3057\u3001\u30ea\u30bd\u30fc\u30b9\u304c\u901f\u3084\u304b\u306b\u89e3\u653e\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u904e\u53bb\u306e\u8abf\u6574\u4f8b\u3068\u3057\u3066\u306f\u3001 <em>tcp_tw_recycle<\/em> \u8ddd\u96e2\u3092\u7f6e\u3044\u3066\u3044\u307e\u3059\u2015\u2015\u305d\u308c\u3089\u306f\u9060\u9694\u306b\u3042\u308b\u304b\u3001\u554f\u984c\u3092\u62b1\u3048\u3066\u3044\u308b\u304b\u3089\u3067\u3059\u3002\u540c\u6642\u306b\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ec\u30d9\u30eb\u3067\u306f SO_REUSEPORT \u3068\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u30d7\u30fc\u30ea\u30f3\u30b0\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u3001\u5f37\u5f15\u306a\u30ab\u30fc\u30cd\u30eb\u64cd\u4f5c\u3088\u308a\u3082\u52b9\u679c\u7684\u3060\u304b\u3089\u3067\u3059\u3002\u904b\u7528\u6642\u306b\u306f\u3001TIME-WAIT \u306e\u5272\u5408\u3092 <code>ss<\/code>; \u6570\u5024\u304c\u6025\u6fc0\u306b\u4e0a\u6607\u3057\u305f\u5834\u5408\u306f\u3001sysctl\u306e\u8a2d\u5b9a\u3092\u3055\u3089\u306b\u5f15\u304d\u4e0a\u3052\u308b\u524d\u306b\u3001\u307e\u305a\u30d7\u30ed\u30ad\u30b7\u3068\u30a2\u30c3\u30d7\u30b9\u30c8\u30ea\u30fc\u30e0\u9593\u306e\u30ad\u30fc\u30d7\u30a2\u30e9\u30a4\u30d6\uff0f\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u306e\u4e00\u8cab\u6027\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002.<\/p>\n\n<h2>Conntrack\u306e\u6ce8\u76ee\u30dd\u30a4\u30f3\u30c8\uff1a\u7121\u7406\u306b\u30b9\u30b1\u30fc\u30eb\u30a2\u30c3\u30d7\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u30c9\u30ed\u30c3\u30d7\u3092\u56de\u907f\u3059\u308b<\/h2>\n\n<p>\u30db\u30b9\u30c8\u306e\u524d\u306b\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3084NAT\u304c\u914d\u7f6e\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3084\u3001\u30ed\u30fc\u30ab\u30eb\u3067iptables\u3084nftables\u304c\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u63a5\u7d9a\u8ffd\u8de1\u30c6\u30fc\u30d6\u30eb\u306e\u5bb9\u91cf\u304c\u5236\u9650\u3055\u308c\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002\u79c1\u306f\u6b21\u306e\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059 <code>net.netfilter.nf_conntrack_max<\/code> \u307e\u305f\u3001RAM\u306e\u5bb9\u91cf\u3084\u60f3\u5b9a\u3055\u308c\u308b\u63a5\u7d9a\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306b\u5408\u308f\u305b\u3066\u30cf\u30c3\u30b7\u30e5\u30b5\u30a4\u30ba\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u91cd\u8981\u306a\u306e\u306f\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3067\u3059\u3002\u30bb\u30c3\u30b7\u30e7\u30f3\u306e\u78ba\u7acb\u306b\u6642\u9593\u304c\u304b\u304b\u308a\u3059\u304e\u308b\u3068\u30b9\u30ed\u30c3\u30c8\u3092\u5360\u6709\u3057\u3001\u9006\u306b\u77ed\u3059\u304e\u308b\u3068 <em>\u671f\u9650\u304c\u65e9\u3059\u304e\u308b<\/em>. \u79c1\u306f\u6e2c\u5b9a\u3059\u308b <em>\u30a8\u30f3\u30c8\u30ea<\/em>, <em>\u691c\u7d22<\/em>, <em>\u898b\u3064\u304b\u3063\u305f<\/em> \u305d\u3057\u3066\u4f55\u3088\u308a\u3082 <em>\u30c9\u30ed\u30c3\u30d7<\/em> Conntrack\u306e\u7d71\u8a08\u60c5\u5831\u306b\u304a\u3044\u3066\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30ad\u30fc\u30d7\u30a2\u30e9\u30a4\u30d6\u3084\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u306e\u8a2d\u5b9a\u304c\u9069\u5207\u306b\u8abf\u6574\u3055\u308c\u3066\u521d\u3081\u3066\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u30b5\u30a4\u30ba\u3092\u62e1\u5927\u3057\u307e\u3059\u3002\u305d\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u5358\u306b\u30e1\u30e2\u30ea\u3092\u6d88\u8cbb\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u52b9\u7387\u7684\u306b\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/08\/hosting-serverraum-9483.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>IPv6\u3068\u30cd\u30a4\u30d0\u30fc\u30d5\u30c3\u30c9\u30ad\u30e3\u30c3\u30b7\u30e5\uff1a\u591a\u6570\u306e\u30d4\u30a2\u304c\u5b58\u5728\u3057\u3066\u3082\u5b89\u5b9a\u3057\u3066\u3044\u308b<\/h2>\n\n<p>\u30c7\u30e5\u30a2\u30eb\u30b9\u30bf\u30c3\u30af\u74b0\u5883\u3067\u306f\u3001\u591a\u304f\u306eTCP\u30b9\u30a4\u30c3\u30c1\u306e\u6319\u52d5\u306f\u540c\u3058\u3067\u3059\u304c\u3001\u305d\u308c\u3067\u3082\u30cd\u30a4\u30d0\u30fc\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u78ba\u8a8d\u3057\u3066\u304a\u304f\u4fa1\u5024\u304c\u3042\u308a\u307e\u3059\u3002\u540c\u6642\u306b\u591a\u6570\u306e\u76f8\u624b\u5148\u3068\u901a\u4fe1\u3059\u308b\u30db\u30b9\u30c8\u306b\u3064\u3044\u3066\u306f\u3001\u5ff5\u306e\u305f\u3081ARP\/ND\u30c6\u30fc\u30d6\u30eb\u306e\u3057\u304d\u3044\u5024\u3092\u5f15\u304d\u4e0a\u3052\u3066\u3044\u307e\u3059\uff08<code>net.ipv4.neigh.default.gc_thresh{1,2,3}<\/code> \u304a\u3088\u3073IPv6\u306e\u5bfe\u5fdc\u3059\u308b\u9805\u76ee\uff09\u3092\u6307\u5b9a\u3057\u3001\u30a8\u30f3\u30c8\u30ea\u304c\u6642\u671f\u5c1a\u65e9\u306b\u4e0a\u66f8\u304d\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u30b5\u30fc\u30d0\u30fc\u3067\u306f\u3001\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u51e6\u7406\u3092\u7121\u52b9\u306b\u3057\u3066\u3044\u307e\u3059\uff08<code>send_redirects<\/code> \u305d\u308c\u305e\u308c <code>accept_redirects<\/code>) \u305d\u3057\u3066\u3001\u4e00\u8cab\u6027\u3092\u4fdd\u3064\u3088\u3046\u306b\u6ce8\u610f\u3057\u3001 <code>accept_ra<\/code>- \u30eb\u30fc\u30bf\u30fc\u306e\u30a2\u30ca\u30a6\u30f3\u30b9\u304c\u4e0d\u8981\u306a\u5834\u5408\u306e\u52d5\u4f5c\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b9\u30bf\u30c3\u30af\u5185\u306e\u4e0d\u8981\u306a\u51e6\u7406\u304c\u8efd\u6e1b\u3055\u308c\u3001\u8fd1\u96a3\u30ce\u30fc\u30c9\u306e\u89e3\u6c7a\u304c\u4e0d\u5b89\u5b9a\u306b\u306a\u3063\u305f\u969b\u306e\u539f\u56e0\u4e0d\u660e\u306e\u9045\u5ef6\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.<\/p>\n\n<h2>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u95a2\u9023\u3059\u308b\u8abf\u6574\u9805\u76ee\uff1aSYN\u30af\u30c3\u30ad\u30fc\u3001\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3001ECN<\/h2>\n\n<p>\u300c\u30d4\u30fc\u30af\u300d\u307e\u305f\u306f\u300c\u30dc\u30c3\u30c8\u306e\u30d4\u30fc\u30af\u300d\u3067\u3001\u79c1\u306f\u4ee5\u4e0b\u3092\u6709\u52b9\u306b\u3057\u307e\u3059 <code>net.ipv4.tcp_syncookies=1<\/code> SYN\u30d5\u30e9\u30c3\u30c9\u306b\u5bfe\u3059\u308b\u5b89\u5168\u7b56\u3068\u3057\u3066\u3002\u79c1\u306f <code>tcp_timestamps<\/code> \u305d\u3057\u3066 <code>tcp_sack<\/code> \u901a\u5e38\u306f\u6709\u52b9\u306b\u3057\u3066\u304a\u304f\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u518d\u9001\u4fe1\u3092\u3088\u308a\u9069\u5207\u306b\u5236\u5fa1\u3067\u304d\u308b\u305f\u3081\u3067\u3042\u308a\u3001\u7121\u52b9\u306b\u3057\u3066\u3082\u5b9f\u8cea\u7684\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u5f97\u3089\u308c\u308b\u3053\u3068\u306f\u3081\u3063\u305f\u306b\u3042\u308a\u307e\u305b\u3093\u3002. <code>tcp_ecn<\/code> \u79c1\u306f\u9078\u629e\u7684\u306b\u30c6\u30b9\u30c8\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002\u7ba1\u7406\u304c\u884c\u304d\u5c4a\u3044\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u306f\u3001ECN\u306f\u30ec\u30a4\u30c6\u30f3\u30b7\u30fc\u3092\u4f4e\u6e1b\u3067\u304d\u307e\u3059\u304c\u3001\u53e4\u3044\u30df\u30c9\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u906d\u9047\u3059\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u79c1\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u5909\u308f\u308a\u307e\u305b\u3093\u3002\u307e\u305a\u6e2c\u5b9a\u3092\u884c\u3044\u3001\u305d\u306e\u5f8c\u6bb5\u968e\u7684\u306b\u5c55\u958b\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u3053\u306e\u5206\u91ce\u3067\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f\u5bc6\u63a5\u306b\u95a2\u9023\u3057\u3066\u3044\u308b\u304b\u3089\u3067\u3059\u3002.<\/p>\n\n<h2>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5fae\u8abf\u6574\uff1avfs_cache_pressure\u3001dirty_bytes\u3001max_map_count<\/h2>\n\n<p>Web\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u6e29\u3081\u3089\u308c\u305fDentry\/inode\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6069\u6075\u3092\u5927\u304d\u304f\u53d7\u3051\u307e\u3059\u3002 <code>vm.vfs_cache_pressure<\/code> \u30ab\u30fc\u30cd\u30eb\u304c\u3053\u308c\u3089\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u904e\u5ea6\u306b\u7a4d\u6975\u7684\u306b\u7834\u68c4\u3059\u308b\u306e\u3092\u9632\u304e\u307e\u3059\uff08\u521d\u671f\u5024\u306f50\uff5e100\uff09\u3002RAM\u304c\u8c4a\u5bcc\u306a\u30db\u30b9\u30c8\u3067\u306f\u3001\u79c1\u306f <code>vm.dirty_bytes<\/code> \u305d\u3057\u3066 <code>vm.dirty_background_bytes<\/code> \u30d1\u30fc\u30bb\u30f3\u30c6\u30fc\u30b8\u5024\u306e\u4ee3\u308f\u308a\u306b\u3001\u30d5\u30e9\u30c3\u30b7\u30e5\u306e\u30b5\u30a4\u30ba\u3092\u7d76\u5bfe\u5024\u3067\u4e0a\u9650\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u66f8\u304d\u8fbc\u307f\u30ec\u30fc\u30c8\u3092\u7ba1\u7406\u53ef\u80fd\u306a\u7bc4\u56f2\u306b\u4fdd\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u591a\u304f\u306e\u30ef\u30fc\u30ab\u30fc\u3084\u52d5\u7684\u8a00\u8a9e\u3067\u306f\u3001\u5927\u91cf\u306e\u30e1\u30e2\u30ea\u9818\u57df\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u307e\u3059\u304c\u3001\u3053\u3053\u3067\u306f <code>vm.max_map_count<\/code> \u591a\u304f\u306e\u30d7\u30ed\u30bb\u30b9\u3084\u30b9\u30ec\u30c3\u30c9\u3092\u542b\u3080\u30c7\u30d7\u30ed\u30a4\u304c\u30de\u30c3\u30d4\u30f3\u30b0\u306e\u5236\u9650\u306b\u3088\u3063\u3066\u5931\u6557\u3057\u306a\u3044\u3088\u3046\u3001\u9069\u5207\u306b\u8abf\u6574\u3057\u307e\u3059\u3002\u6700\u9069\u5316\u306e\u52b9\u679c\u3092\u6e2c\u5b9a\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u5909\u66f4\u5f8c\u306f\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30d2\u30c3\u30c8\u7387\u3068IO\u5f85\u6a5f\u6642\u9593\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<h2>\u6e2c\u5b9a\u65b9\u6cd5\uff1a\u518d\u73fe\u6027\u306e\u3042\u308b\u8ca0\u8377\u3068\u30ab\u30fc\u30cd\u30eb\u8996\u70b9<\/h2>\n\n<p>\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306e\u52b9\u679c\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u3001\u73fe\u5b9f\u7684\u306a\u30e6\u30fc\u30b6\u30fc\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u30b7\u30df\u30e5\u30ec\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u5c0f\u3055\u306a\u30a2\u30bb\u30c3\u30c8\u3001\u9577\u3044\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3001TLS\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3001HTTP\/2\u30de\u30eb\u30c1\u30d7\u30ec\u30af\u30b7\u30f3\u30b0\u306a\u3069\u3067\u3059\u3002\u8ca0\u8377\u30c6\u30b9\u30c8\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066p50\/p95\/p99\u306e\u76ee\u6a19\u5024\u3092\u751f\u6210\u3059\u308b\u3068\u540c\u6642\u306b\u3001\u30ab\u30fc\u30cd\u30eb\u5074\u306e\u72b6\u6cc1\u3092\u6e2c\u5b9a\u3057\u3066\u3044\u307e\u3059\uff1a <code>ss -s<\/code>, <code>ss -tin<\/code>, <code>\u30a8\u30cc\u30b9\u30bf\u30c3\u30c8<\/code>, <code>\u30b5\u30eb<\/code>, <code>\u30a8\u30e0\u30d4\u30fc\u30b9\u30bf\u30c3\u30c8<\/code> \u305d\u3057\u3066\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u30ab\u30a6\u30f3\u30bf\u30fc\u304c\u3001\u3069\u3053\u3067\u554f\u984c\u304c\u8d77\u304d\u3066\u3044\u308b\u304b\u3092\u6559\u3048\u3066\u304f\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u3092\u901a\u3058\u3066 <code>tc netem<\/code> RTT\u3001\u30b8\u30c3\u30bf\u30fc\u3001\u30d1\u30b1\u30c3\u30c8\u30ed\u30b9\u3092\u30a8\u30df\u30e5\u30ec\u30fc\u30c8\u3057\u3001\u30d0\u30c3\u30d5\u30a1\u8a2d\u5b9a\u3092\u73fe\u5b9f\u7684\u306a\u6761\u4ef6\u4e0b\u3067\u691c\u8a3c\u3057\u3066\u3044\u307e\u3059\u3002\u3059\u3079\u3066\u306e\u5909\u66f4\u306b\u3064\u3044\u3066\u3001\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3001\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u3001\u5bfe\u7167\u6e2c\u5b9a\u7d50\u679c\u3092\u8a18\u9332\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u306e\u307f\u3001\u76f8\u95a2\u95a2\u4fc2\u3092\u78ba\u5b9f\u306b\u7279\u5b9a\u3057\u3001\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u306e\u5224\u65ad\u3092\u7684\u78ba\u306b\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3059\u3002.<\/p>\n\n<h2>\u6765\u5ba2\u3068\u30b3\u30f3\u30c6\u30ca\uff1a\u9650\u754c\u3092\u628a\u63e1\u3057\u3001\u52b9\u679c\u3092\u78ba\u4fdd\u3059\u308b<\/h2>\n\n<p>VM\u3067\u306f\u3001\u6b21\u306e\u70b9\u306b\u6ce8\u610f\u3057\u3066\u3044\u307e\u3059 <em>CPU\u30b9\u30c6\u30a3\u30fc\u30eb<\/em> \u305d\u3057\u3066\u4eee\u60f3\u5316\u30ec\u30a4\u30e4\u30fc\uff1a\u30cf\u30a4\u30d1\u30fc\u30d0\u30a4\u30b6\u30fc\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3057\u3066\u3044\u308b\u3068\u3001\u5b8c\u74a7\u306asysctl\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3082\u610f\u5473\u3092\u306a\u3055\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u79c1\u306fIRQ\u306e\u8ca0\u8377\u3092\u5206\u6563\u3055\u305b\u3001RPS\/XPS\u304a\u3088\u3073GRO\u306e\u8a2d\u5b9a\u304cNIC\u3084vCPU\u306e\u30c8\u30dd\u30ed\u30b8\u30fc\u306b\u5408\u3063\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002 \u30b3\u30f3\u30c6\u30ca\u3067\u306f\u3001\u8a31\u53ef\u3055\u308c\u305f\uff08\u5b89\u5168\u306a\uff09sysctl\u306e\u307f\u304cPod\u30ec\u30d9\u30eb\u3067\u6709\u52b9\u3068\u306a\u308b\u305f\u3081\u3001\u591a\u304f\u306e\u8a2d\u5b9a\u306f\u30db\u30b9\u30c8\u5074\u3067\u884c\u3063\u3066\u3044\u307e\u3059\u3002 \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u5f15\u304d\u4e0a\u3052\u3089\u308c\u305f\u30ea\u30bd\u30fc\u30b9\u3092\u78ba\u5b9f\u306b\u6d3b\u7528\u3067\u304d\u308b\u3088\u3046\u3001\u30ab\u30fc\u30cd\u30eb\u306e\u5236\u9650\u5024\uff08FD\u5236\u9650\u3001\u30e1\u30e2\u30ea\u306a\u3069\uff09\u3092cgroup\u306e\u5236\u9650\u5024\u3068\u6574\u5408\u3055\u305b\u3066\u3044\u307e\u3059\u3002\u52b9\u679c\u3092\u5de6\u53f3\u3059\u308b\u306e\u306f\u3001\u30db\u30b9\u30c8\u306e\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3001\u30aa\u30fc\u30b1\u30b9\u30c8\u30ec\u30fc\u30bf\u30fc\u306e\u30dd\u30ea\u30b7\u30fc\u3001\u304a\u3088\u3073\u30b5\u30fc\u30d3\u30b9\u306e\u5236\u9650\u5024\u306e\u76f8\u4e92\u4f5c\u7528\u3067\u3042\u308a\u3001\u5358\u4e00\u306e\u5024\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n<h2>\u6982\u8981\uff1a\u78ba\u5b9f\u306b\u9ad8\u6027\u80fd\u306a\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u3092\u5b9f\u73fe<\/h2>\n\n<p>\u96c6\u4e2d\u3057\u3066 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\u79c1\u306f\u6c7a\u3057\u3066\u3084\u307f\u304f\u3082\u306b\u5024\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u306f\u306a\u304f\u3001\u6052\u4e45\u7684\u306b\u8a2d\u5b9a\u3059\u308b\u524d\u306b\u305d\u306e\u52b9\u679c\u3092\u6e2c\u5b9a\u3057\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u9032\u3081\u308b\u3053\u3068\u3067\u3001\u30ea\u30bd\u30fc\u30b9\u3092\u7121\u99c4\u306b\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3068\u5b89\u5b9a\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u3055\u306b\u3053\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3053\u305d\u304c\u3001\u65e5\u5e38\u306eWeb\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30b5\u30fc\u30d0\u30fc\u3092\u3088\u308a\u9ad8\u901f\u3067\u4e88\u6e2c\u53ef\u80fd\u306b\u3057\u3001\u5b9f\u969b\u306e 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