{"id":20858,"date":"2026-08-21T11:49:48","date_gmt":"2026-08-21T09:49:48","guid":{"rendered":"https:\/\/webhosting.de\/linux-dirty-ratio-dirty-background-ratio-optimierung-writeback\/"},"modified":"2026-08-21T11:49:48","modified_gmt":"2026-08-21T09:49:48","slug":"linux-%e3%83%80%e3%83%bc%e3%83%86%e3%82%a3%e3%83%bb%e3%83%ac%e3%82%b7%e3%82%aa-%e3%83%80%e3%83%bc%e3%83%86%e3%82%a3%e3%83%bb%e3%83%90%e3%83%83%e3%82%af%e3%82%b0%e3%83%a9%e3%82%a6%e3%83%b3%e3%83%89","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/linux-dirty-ratio-dirty-background-ratio-optimierung-writeback\/","title":{"rendered":"Linux\u306e\u30c0\u30fc\u30c6\u30a3\u30fb\u30ec\u30b7\u30aa\u3068\u30c0\u30fc\u30c6\u30a3\u30fb\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u30fb\u30ec\u30b7\u30aa\uff1a\u66f8\u304d\u8fbc\u307f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u306e\u5fae\u8abf\u6574"},"content":{"rendered":"<p>\u3069\u306e\u3088\u3046\u306b <strong>linux dirty<\/strong> \u307e\u305f\u3001\u300cdirty background ratio\u300d\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u5236\u5fa1\u3057\u3001\u66f8\u304d\u8fbc\u307f\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u3001\u30c7\u30fc\u30bf\u6574\u5408\u6027\u3092\u6700\u9069\u5316\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5177\u4f53\u7684\u306a\u95be\u5024\u3092\u8a2d\u5b9a\u3057\u3001\u30d5\u30e9\u30c3\u30b7\u30e3\u30fc\u3092\u9069\u5207\u306a\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u8d77\u52d5\u3055\u305b\u3001\u30d6\u30ed\u30c3\u30af\u3092\u56de\u907f\u3057\u3001\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306e\u66f8\u304d\u8fbc\u307f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.<\/p>\n\n<h2>\u4e2d\u5fc3\u70b9<\/h2>\n<p>\u307e\u305a\u5192\u982d\u3067\u3001\u672c\u984c\u306b\u6df1\u304f\u5165\u308b\u524d\u306b\u3001\u4e3b\u306a\u30dd\u30a4\u30f3\u30c8\u3092\u7c21\u5358\u306b\u307e\u3068\u3081\u307e\u3059\u3002.<\/p>\n<ul>\n  <li><strong>\u308f\u3044\u305b\u3064\u306a\u30da\u30fc\u30b8<\/strong> RAM\u306b\u30c7\u30fc\u30bf\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3001\u591a\u6570\u306e\u5c0f\u3055\u306a\u30a2\u30af\u30bb\u30b9\u3092\u307e\u3068\u3081\u3066\u3001\u3088\u308a\u52b9\u7387\u7684\u306aI\/O\u64cd\u4f5c\u3092\u884c\u3044\u307e\u3059\u3002.<\/li>\n  <li><strong>\u30c0\u30fc\u30c6\u30a3\u30fb\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u30fb\u30ec\u30b7\u30aa<\/strong> \u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u3067\u30d5\u30e9\u30c3\u30b7\u30e3\u30fc\u30b9\u30ec\u30c3\u30c9\u3092\u8d77\u52d5\u3057\u3001\u6c17\u3065\u304b\u308c\u306a\u3044\u3046\u3061\u306b\u30b4\u30df\u306e\u91cf\u3092\u6291\u5236\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>\u30c0\u30fc\u30c6\u30a3\u30ec\u30b7\u30aa<\/strong> \u30cf\u30fc\u30c9\u30ea\u30df\u30c3\u30c8\u3092\u8d85\u3048\u305f\u5834\u5408\u3001\u66f8\u304d\u8fbc\u307f\u4e2d\u306e\u30d7\u30ed\u30bb\u30b9\u306e\u51e6\u7406\u3092\u6291\u5236\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>\u95a2\u4fc2<\/strong> \u3053\u308c\u30892\u3064\u306e\u5024\u306b\u3088\u3063\u3066\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u306e\u30d4\u30fc\u30af\u5024\u3001\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3001\u304a\u3088\u3073\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u304c\u6c7a\u307e\u308a\u307e\u3059\u3002.<\/li>\n  <li><strong>Bytes\u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3<\/strong> (dirty_bytes) \u306f\u3001\u5927\u898f\u6a21\u306a\u30b5\u30fc\u30d0\u30fc\u306b\u304a\u3044\u3066\u3001\u3088\u308a\u304d\u3081\u7d30\u304b\u306a\u7d76\u5bfe\u7684\u306a\u5236\u5fa1\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002.<\/li>\n<\/ul>\n\n<h2>\u300c\u30c0\u30fc\u30c6\u30a3\u30fb\u30da\u30fc\u30b8\u30ba\u300d\u3092\u7406\u89e3\u3059\u308b<\/h2>\n\n<p>\u30d7\u30ed\u30bb\u30b9\u304c\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u3080\u3068\u3001\u305d\u306e\u30c7\u30fc\u30bf\u306f\u307e\u305a <strong>\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5<\/strong> \u305d\u3057\u3066\u3001\u30ab\u30fc\u30cd\u30eb\u304c\u305d\u308c\u3089\u3092\u30c7\u30a3\u30b9\u30af\u306b\u30d5\u30e9\u30c3\u30b7\u30e5\u3067\u304d\u308b\u307e\u3067\u300c\u30c0\u30fc\u30c6\u30a3\u300d\u3068\u3057\u3066\u30de\u30fc\u30af\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u306b\u3088\u308a\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u51e6\u7406\u304c\u9ad8\u901f\u5316\u3055\u308c\u307e\u3059\u3002\u306a\u305c\u306a\u3089\u3001RAM\u306f\u3069\u306eSSD\u3084HDD\u3088\u308a\u3082\u53cd\u5fdc\u304c\u901f\u304f\u3001\u5c0f\u3055\u306a\u66f8\u304d\u8fbc\u307f\u304c\u5927\u304d\u306a\u9023\u7d9a\u8ee2\u9001\u3078\u3068\u307e\u3068\u307e\u308b\u304b\u3089\u3067\u3059\u3002 \u79c1\u306f\u5e38\u306b\u3001\u3069\u308c\u3060\u3051\u306e\u300c\u30c0\u30fc\u30c6\u30a3\u300d\u3092\u8a31\u5bb9\u3059\u308b\u304b\u3092\u5ff5\u982d\u306b\u7f6e\u3044\u3066\u3044\u307e\u3059\u3002\u306a\u305c\u306a\u3089\u3001\u30d0\u30c3\u30d5\u30a1\u304c\u591a\u3059\u304e\u308b\u3068\u30ad\u30e5\u30fc\u304c\u9577\u304f\u306a\u3063\u305f\u308a\u3001\u30af\u30e9\u30c3\u30b7\u30e5\u6642\u306b\u672a\u4fdd\u5b58\u306e\u30c7\u30fc\u30bf\u304c\u5897\u3048\u308b\u30ea\u30b9\u30af\u304c\u9ad8\u307e\u308b\u304b\u3089\u3067\u3059\u3002\u305d\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3057\u3066\u3044\u308c\u3070\u3001\u30e9\u30a4\u30c8\u30d0\u30c3\u30af\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u3001\u30b9\u30c8\u30ec\u30fc\u30b8\u3078\u306e\u8ca0\u8377\u306b\u3064\u3044\u3066\u3001\u3088\u308a\u9069\u5207\u306a\u5224\u65ad\u3092\u4e0b\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u4ef6\u306b\u95a2\u3059\u308b\u7c21\u5358\u306a\u89e3\u8aac\u8a18\u4e8b\u306f\u3053\u3061\u3089\uff1a <a href=\"https:\/\/webhosting.de\/ja\/%e3%83%a9%e3%82%a4%e3%83%88%e3%83%90%e3%83%83%e3%82%af%e3%82%ad%e3%83%a3%e3%83%83%e3%82%b7%e3%83%a5%e3%80%81linux%e3%82%ab%e3%83%bc%e3%83%8d%e3%83%ab%e3%82%ad%e3%83%a3%e3%83%83%e3%82%b7%e3%83%a5\/\">\u30e9\u30a4\u30c8\u30d0\u30c3\u30af\u30ad\u30e3\u30c3\u30b7\u30e5<\/a> \u3053\u306e\u4ed5\u7d44\u307f\u3092\u660e\u78ba\u306b\u6574\u7406\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002.<\/p>\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-schreibfeintuning-7492.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30c7\u30fc\u30bf\u6574\u5408\u6027\u3001fsync\u3001\u304a\u3088\u3073\u30af\u30e9\u30c3\u30b7\u30e5\u30a6\u30a3\u30f3\u30c9\u30a6<\/h2>\n<p>\u3053\u308c\u3089\u306e\u95be\u5024\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3060\u3051\u3067\u306a\u304f\u3001\u30ea\u30b9\u30af\u306e\u8a31\u5bb9\u7bc4\u56f2\u306b\u3082\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002\u79c1\u306f\u3053\u308c\u3092\u7c21\u5358\u306a\u7d4c\u9a13\u5247\u3067\u6982\u7b97\u3057\u3066\u3044\u307e\u3059\u3002\u6700\u5927\u4e0d\u5b89\u5b9a\u30c7\u30fc\u30bf\u91cf\u3092\u3001\u30c7\u30d0\u30a4\u30b9\u306e\u6301\u7d9a\u7684\u306a\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3067\u5272\u308b\u3068\u3001\u30d0\u30c3\u30d5\u30a1\u304c\u7a7a\u306b\u306a\u308b\u307e\u3067\u306e\u6642\u9593\u304c\u5927\u307e\u304b\u306b\u7b97\u51fa\u3055\u308c\u307e\u3059\u3002 \u4f8b\uff1a4 GB\u306e\u30c0\u30fc\u30c6\u30a3\u30c7\u30fc\u30bf\u3092\u8a31\u5bb9\u3057\u3001\u30bf\u30fc\u30b2\u30c3\u30c8\u30e1\u30c7\u30a3\u30a2\u306e\u8ee2\u9001\u901f\u5ea6\u304c500 MB\/s\u306e\u5834\u5408\u3001\u66f8\u304d\u8fbc\u307f\u304c\u5b8c\u4e86\u3059\u308b\u307e\u3067\u7d048\u79d2\u304b\u304b\u308a\u307e\u3059\u3002\u3053\u306e\u9593\u306b\u505c\u96fb\u3084\u30ab\u30fc\u30cd\u30eb\u30d1\u30cb\u30c3\u30af\u304c\u767a\u751f\u3059\u308b\u3068\u3001\u76f4\u8fd1\u306e\u66f8\u304d\u8fbc\u307f\u30c7\u30fc\u30bf\u304c\u5931\u308f\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u6b21\u306e\u65b9\u6cd5\u3067\u30a6\u30a3\u30f3\u30c9\u30a6\u3092 <code>fsync()<\/code> \u6216\u3044\u306f <code>fdatasync()<\/code> \u30b5\u30a4\u30ba\u3092\u7e2e\u5c0f\u3057\u307e\u3059\u3002\u3068\u3044\u3046\u306e\u3082\u3001\u3053\u3046\u3057\u305f\u30a2\u30af\u30bb\u30b9\u306f\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306b\u3001\u30c7\u30fc\u30bf\uff08\u30b8\u30e3\u30fc\u30ca\u30ea\u30f3\u30b0\u30e2\u30fc\u30c9\u306b\u3088\u3063\u3066\u306f\u30e1\u30bf\u30c7\u30fc\u30bf\u3082\uff09\u3092\u30e1\u30c7\u30a3\u30a2\u306b\u66f8\u304d\u8fbc\u3080\u3053\u3068\u3092\u5f37\u3044\u308b\u304b\u3089\u3067\u3059\u3002\u3053\u308c\u306f\u30b3\u30b9\u30c8\u304c\u304b\u304b\u308a\u307e\u3059\u304c\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3084\u30b8\u30e3\u30fc\u30ca\u30eb\u306b\u3068\u3063\u3066\u306f\u4e0d\u53ef\u6b20\u3067\u3059\u3002 \u79c1\u306f\u3001\u30c0\u30fc\u30c6\u30a3\u30fb\u30ea\u30df\u30c3\u30c8\u304c\u540c\u671f\u306e\u6319\u52d5\u3068\u6574\u5408\u3059\u308b\u3088\u3046\u306b\u6ce8\u610f\u3057\u3066\u3044\u307e\u3059\u3002\u983b\u7e41\u306a <code>fsync()<\/code>-\u95b2\u89a7\u6570\u306f\u3001\u3088\u308a\u4f4e\u3044 <em>\u30c0\u30fc\u30c6\u30a3\u30ec\u30b7\u30aa<\/em>, \u3001\u305d\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u3082\u3068\u3082\u3068\u5b9a\u671f\u7684\u306b\u6c38\u7d9a\u5316\u304c\u884c\u308f\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u30ab\u30fc\u30cd\u30eb\u306b\u3088\u308b\u8ffd\u52a0\u306e\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u6291\u5236\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u9006\u306b\u3001\u30d5\u30e9\u30c3\u30b7\u30e5\u304c\u3081\u3063\u305f\u306b\u884c\u308f\u308c\u306a\u3044append\u4e2d\u5fc3\u306e\u30ed\u30b0\u306b\u3064\u3044\u3066\u306f\u3001\u8a31\u5bb9\u3067\u304d\u308b\u30c7\u30fc\u30bf\u640d\u5931\u30ea\u30b9\u30af\u3092\u5e38\u306b\u8003\u616e\u3057\u305f\u4e0a\u3067\u3001\u3088\u308a\u5927\u304d\u306a\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u3092\u8a2d\u5b9a\u3057\u3066\u3082\u3088\u3044\u3002.<\/p>\n<p>\u30d0\u30ea\u30a2\u3084\u66f8\u304d\u8fbc\u307f\u9806\u5e8f\u3082\u91cd\u8981\u3067\u3059\u3002\u6700\u65b0\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001FUA\/\u30d5\u30e9\u30c3\u30b7\u30e5\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6b63\u3057\u304f\u30af\u30ea\u30a2\u3057\u3066\u3044\u307e\u3059\u3002 \u30d1\u30ef\u30fc\u30ed\u30b9\u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3\uff08PLP\uff09\u306e\u306a\u3044\u30e1\u30c7\u30a3\u30a2\u3067\u306f\u3001\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u304c\u5927\u304d\u3044\u307b\u3069\u30ea\u30b9\u30af\u304c\u9ad8\u307e\u308a\u307e\u3059\u304c\u3001PLP\u3084\u66f8\u304d\u8fbc\u307f\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u4fdd\u8b77\u6a5f\u80fd\u304c\u3042\u308c\u3070\u3001\u3088\u308a\u5927\u304d\u306a\u30d0\u30c3\u30d5\u30a1\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u591a\u304f\u306e\u5834\u5408\u8a31\u5bb9\u3055\u308c\u307e\u3059\u3002.<\/p>\n\n<h2>Dirty Background Ratio\uff1a\u30bd\u30d5\u30c8\u306a\u95be\u5024<\/h2>\n\n<p>\u3068\u4e00\u7dd2\u306b <strong>\u30c0\u30fc\u30c6\u30a3\u30fb\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u30fb\u30ec\u30b7\u30aa<\/strong> \u5229\u7528\u53ef\u80fd\u306a\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u4f55\u30d1\u30fc\u30bb\u30f3\u30c8\u306b\u9054\u3057\u305f\u6642\u70b9\u3067\u3001\u30d5\u30e9\u30c3\u30b7\u30e3\u30fc\u30fb\u30b9\u30ec\u30c3\u30c9\u304c\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u3067\u306e\u66f8\u304d\u8fbc\u307f\u3092\u958b\u59cb\u3059\u308b\u304b\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u3053\u306e\u5024\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u3082\u306e\u3067\u306f\u306a\u304f\u3001\u30d0\u30c3\u30d5\u30a1\u304c\u6ea2\u308c\u51fa\u3055\u306a\u3044\u3088\u3046\u3001\u9759\u304b\u306b\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u4f5c\u696d\u3092\u958b\u59cb\u3057\u307e\u3059\u3002 \u6570\u5024\u3092\u4f4e\u304f\u8a2d\u5b9a\u3059\u308b\u3068\u3001\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u3067\u306e\u66f8\u304d\u8fbc\u307f\u306f\u983b\u7e41\u306b\u306a\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u983b\u5ea6\u306f\u5747\u4e00\u306b\u306a\u308a\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u306e\u30d4\u30fc\u30af\u304c\u5e73\u6ed1\u5316\u3055\u308c\u307e\u3059\u3002\u6570\u5024\u3092\u9ad8\u304f\u8a2d\u5b9a\u3059\u308b\u3068\u3001\u3088\u308a\u591a\u304f\u306e\u30d0\u30c3\u30d5\u30a1\u304c\u8a31\u5bb9\u3055\u308c\u308b\u305f\u3081\u3001\u5927\u898f\u6a21\u306a\u30b7\u30fc\u30b1\u30f3\u30b7\u30e3\u30eb\u66f8\u304d\u8fbc\u307f\u3067\u306f\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u304c\u5411\u4e0a\u3057\u307e\u3059\u304c\u3001\u7a81\u7136\u306e\u30d5\u30e9\u30c3\u30b7\u30e5\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3001\u8457\u3057\u3044I\/O\u306e\u30d4\u30fc\u30af\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 \u901a\u5e38\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306f10\uff05\u524d\u5f8c\u3067\u3059\u304c\u3001\u79c1\u306f\u30e1\u30c7\u30a3\u30a2\u3001\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u3053\u306e\u95be\u5024\u3092\u8abf\u6574\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<h2>\u30c0\u30fc\u30c6\u30a3\u30fb\u30ec\u30b7\u30aa\uff1a\u6025\u30d6\u30ec\u30fc\u30ad<\/h2>\n\n<p>\u30d1\u30e9\u30e1\u30fc\u30bf <strong>\u30c0\u30fc\u30c6\u30a3\u30ec\u30b7\u30aa<\/strong> \u3053\u308c\u306f\u3001\u5341\u5206\u306a\u30da\u30fc\u30b8\u304c\u66f8\u304d\u623b\u3055\u308c\u308b\u307e\u3067\u3001\u30ab\u30fc\u30cd\u30eb\u304c\u66f8\u304d\u8fbc\u307f\u30d7\u30ed\u30bb\u30b9\u3092\u5236\u9650\u3059\u308b\u95be\u5024\u3092\u793a\u3057\u307e\u3059\u3002\u3053\u306e\u53b3\u683c\u306a\u5236\u9650\u306f\u3001\u30e1\u30e2\u30ea\u304c\u6c38\u7d9a\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u30c7\u30fc\u30bf\u306e\u6d2a\u6c34\u306b\u3055\u3089\u3055\u308c\u308b\u306e\u3092\u9632\u304e\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u3055\u3089\u306b\u30c7\u30fc\u30bf\u3092\u751f\u6210\u3057\u3088\u3046\u3068\u3057\u305f\u77ac\u9593\u306b\u76f4\u63a5\u5f71\u97ff\u3092\u53ca\u307c\u3057\u307e\u3059\u3002 \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5834\u5408\u3001\u30af\u30a8\u30ea\u306e\u5fdc\u7b54\u6642\u9593\u3092\u4e00\u5b9a\u306b\u4fdd\u3061\u3001\u9577\u6642\u9593\u306e\u30d5\u30e9\u30c3\u30b7\u30e5\u51e6\u7406\u304c\u767a\u751f\u3057\u306a\u3044\u3088\u3046\u306b\u3001\u3053\u306e\u5024\u3092\u6bd4\u8f03\u7684\u4f4e\u304f\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002 \u4e00\u65b9\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30b8\u30e7\u30d6\u3067\u306f\u3001\u5927\u304d\u306a\u30d6\u30ed\u30c3\u30af\u3092\u52b9\u7387\u7684\u306b\u8ee2\u9001\u3059\u308b\u305f\u3081\u306b\u3001\u3088\u308a\u5927\u304d\u306a\u30d0\u30c3\u30d5\u30a1\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u4e00\u822c\u7684\u306a\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306f20\uff05\u304b\u308940\uff05\u306e\u9593\u3067\u3059\u304c\u3001\u79c1\u306f\u5e38\u306b\u5b9f\u969b\u306e\u8ca0\u8377\u306b\u5408\u308f\u305b\u3066\u3053\u306e\u7bc4\u56f2\u3092\u8abf\u6574\u3057\u3066\u3044\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_perf_neu_opt_3847.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u76f8\u4e92\u4f5c\u7528\u3068\u5178\u578b\u7684\u306a\u95a2\u4fc2<\/h2>\n\n<p>\u3053\u308c\u3089\u306e2\u3064\u306e\u95be\u5024\u306f\u3001 <strong>\u30bf\u30f3\u30c7\u30e0<\/strong> \u3053\u308c\u3089\u306f\u7d44\u307f\u5408\u308f\u3055\u3063\u3066\u521d\u3081\u3066\u52b9\u679c\u3092\u767a\u63ee\u3057\u307e\u3059\u3002\u79c1\u306f\u3001\u30ab\u30fc\u30cd\u30eb\u304c\u9069\u6642\u306b\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u3067\u8d77\u52d5\u3057\u3001\u30cf\u30fc\u30c9\u30d6\u30ec\u30fc\u30ad\u30f3\u306e\u767a\u52d5\u304c\u7a00\u306b\u306a\u308b\u3088\u3046\u3001\u5e38\u306b dirty_background_ratio \u3092 dirty_ratio \u3088\u308a\u4f4e\u304f\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u76ee\u5b89\u3068\u3057\u3066\u3001\u30cf\u30fc\u30c9\u30ea\u30df\u30c3\u30c8\u306e4\u5206\u306e1\u304b\u3089\u534a\u5206\u3001\u4f8b\u3048\u307020\u306b\u5bfe\u3057\u30665\uff5e10\u3068\u3044\u3063\u305f\u5024\u3092\u3088\u304f\u63a1\u7528\u3057\u3066\u3044\u307e\u3059\u3002 \u3053\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3092\u4e0d\u5fc5\u8981\u306b\u4f4e\u4e0b\u3055\u305b\u308b\u3053\u3068\u306a\u304f\u3001Writeback\u3092\u5341\u5206\u306b\u65e9\u3044\u6bb5\u968e\u3067\u958b\u59cb\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u6bd4\u7387\u3092\u8aa4\u308b\u3068\u3001\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0\u304c\u65e9\u3059\u304e\u305f\u308a\u3001\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u51e6\u7406\u304c\u9045\u3059\u304e\u3066\u3001\u9855\u8457\u306a\u30ec\u30a4\u30c6\u30f3\u30b7\u30fc\u306e\u30d4\u30fc\u30af\u304c\u767a\u751f\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002.<\/p>\n\n<h2>\u30c7\u30d0\u30a4\u30b9\u3054\u3068\u306e\u5236\u5fa1\u3068\u30d6\u30ed\u30c3\u30af\u5c64\u306e\u7d30\u304b\u3055<\/h2>\n<p>\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u5236\u9650\u306b\u52a0\u3048\u3001\u30c7\u30d0\u30a4\u30b9\u30ec\u30d9\u30eb\u306b\u3082\u6ce8\u76ee\u3059\u308b\u4fa1\u5024\u304c\u3042\u308a\u307e\u3059\u3002Linux\u306f\u3001\u3044\u308f\u3086\u308b <em>\u5bfe\u5fdc\u30c7\u30d0\u30a4\u30b9<\/em> (bdi)\u3002In <code>\/sys\/class\/block\/\/bdi\/<\/code> \u79c1\u306f\u6b21\u306e\u3088\u3046\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u304c <code>max_ratio<\/code>, \u3001\u3053\u308c\u306f\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\u306b\u8a31\u53ef\u3055\u308c\u305f\u300c\u30c0\u30fc\u30c6\u30a3\u30fb\u30d0\u30b8\u30a7\u30c3\u30c8\u300d\u306e\u3046\u3061\u3001\u500b\u3005\u306e\u30c7\u30d0\u30a4\u30b9\u304c\u3069\u308c\u3060\u3051\u306e\u91cf\u3092\u5f15\u304d\u51fa\u305b\u308b\u304b\u3092\u6c7a\u5b9a\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u4f4e\u901f\u3068\u9ad8\u901f\u306e\u30c9\u30e9\u30a4\u30d6\u304c\u4e26\u5217\u306b\u69cb\u6210\u3055\u308c\u305f\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u4f4e\u901f\u306e\u30b9\u30c8\u30ec\u30fc\u30b8\u304c\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u3001\u305d\u306e\u4f7f\u7528\u91cf\u3092\u5236\u9650\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n<p>\u307e\u305f\u3001\u4ee5\u4e0b\u306b\u3088\u308b\u30d6\u30ed\u30c3\u30af\u30fb\u30ec\u30a4\u30e4\u30fc\u306e\u5e2f\u57df\u5236\u9650\u3082\u95a2\u9023\u3057\u3066\u3044\u307e\u3059\u3002 <code>\/sys\/block\/\/queue\/wbt_lat_usec<\/code> \uff08\u66f8\u304d\u8fbc\u307f\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0\uff09\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u76ee\u6a19\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u66f8\u304d\u8fbc\u307f\u8ca0\u8377\u304c\u3053\u306e\u76ee\u6a19\u6642\u9593\u3092\u8d85\u3048\u308b\u3068\u3001\u30ab\u30fc\u30cd\u30eb\u304c\u66f8\u304d\u8fbc\u307f\u8ca0\u8377\u3092\u6291\u5236\u3057\u307e\u3059\u3002 SATA HDD\u306e\u5834\u5408\u3001\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306b\u3001\u63a7\u3048\u3081\u306a\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u975e\u5e38\u306b\u9ad8\u901f\u306aNVMe\u30c9\u30e9\u30a4\u30d6\u3067\u306f\u3001\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u304c\u4e26\u5217\u51e6\u7406\u80fd\u529b\u3092\u6700\u5927\u9650\u306b\u767a\u63ee\u3067\u304d\u308b\u3088\u3046\u3001\u76ee\u6a19\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u7121\u52b9\u306b\u3059\u308b\u304b\u3001\u3042\u308b\u3044\u306f\u5024\u3092\u5927\u304d\u304f\u3057\u307e\u3059\u3002 I\/O\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\uff08mq-deadline\u3001BFQ\u3001none\uff09\u306f\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u9078\u629e\u3057\u307e\u3059\u3002BFQ\u306f\u3001\u8ca0\u8377\u304c\u6df7\u5728\u3059\u308b\u5bfe\u8a71\u578b\u30b7\u30b9\u30c6\u30e0\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u304c\u3001 <em>\u306a\u3057<\/em> \u3042\u308b\u3044\u306f\u3001NVMe \u3067\u306e\u7d14\u7c8b\u306a\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u30b8\u30e7\u30d6\u3067\u306f\u3001mq-deadline \u304c\u6700\u3082\u826f\u597d\u306b\u52d5\u4f5c\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3002.<\/p>\n<p>\u76f8\u4e92\u4f5c\u7528\u304c\u9375\u3068\u306a\u308b\uff1a\u3082\u3057 <em>\u30c0\u30fc\u30c6\u30a3\u30fb\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u30fb\u30ec\u30b7\u30aa<\/em> \u4f4e\u3044\u8a2d\u5b9a\u3067\u3042\u3063\u3066\u3082\u3001WBT\u306b\u3088\u3063\u3066\u30c7\u30d0\u30a4\u30b9\u304c\u53b3\u3057\u304f\u5236\u9650\u3055\u308c\u308b\u3068\u3001\u305d\u308c\u3067\u3082\u76ee\u306b\u898b\u3048\u308b\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u79c1\u306f\u4e21\u65b9\u306e\u30ec\u30d9\u30eb\u3092\u540c\u6642\u306b\u8abf\u6574\u3057\u3066\u3044\u307e\u3059\u2015\u2015\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u306b\u306f\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u30c0\u30fc\u30c6\u30a3\u30fb\u30ea\u30df\u30c3\u30c8\u3092\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u4fdd\u8b77\u306b\u306f\u30d6\u30ed\u30c3\u30af\u30fb\u30ec\u30a4\u30e4\u30fc\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<h2>Ratio \u5bfe Bytes\uff1a\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3068\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3<\/h2>\n\n<p>\u30ea\u30bd\u30fc\u30b9\u3092\u591a\u304f\u6d88\u8cbb\u3059\u308b\u30b7\u30b9\u30c6\u30e0\u3067\u306f <strong>RAM<\/strong> \u30d1\u30fc\u30bb\u30f3\u30c6\u30fc\u30b8\u5024\u306f\u3059\u3050\u306b\u5927\u304d\u306a\u7d76\u5bfe\u5024\u3078\u3068\u81a8\u308c\u4e0a\u304c\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u79c1\u306f\u3080\u3057\u308d `dirty_bytes` \u3084 `dirty_background_bytes` \u3092\u4f7f\u3063\u3066\u7d76\u5bfe\u7684\u306a\u4e0a\u9650\u3092\u8a2d\u5b9a\u3057\u3001\u30d0\u30c3\u30d5\u30a1\u5bb9\u91cf\u3092\u7d042\uff5e8 GB\u306b\u660e\u78ba\u306b\u5236\u9650\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002 \u3053\u308c\u306b\u3088\u308a\u3001\u30e1\u30e2\u30ea\u69cb\u6210\u306e\u5927\u5e45\u306a\u5909\u52d5\u304b\u3089\u5236\u5fa1\u3092\u5207\u308a\u96e2\u3057\u3001\u6c38\u7d9a\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u30c7\u30fc\u30bf\u306e\u91cf\u3092\u4e88\u6e2c\u53ef\u80fd\u306a\u7bc4\u56f2\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u9078\u629e\u306f\u52d5\u7684\u306b\u884c\u3044\u307e\u3059\u3002RAM\u5bb9\u91cf\u304c\u5c11\u306a\u3044\u5c0f\u898f\u6a21\u306a\u30b5\u30fc\u30d0\u30fc\u306e\u5834\u5408\u3001\u591a\u304f\u306e\u5834\u5408\u3001\u30d1\u30fc\u30bb\u30f3\u30c6\u30fc\u30b8\u3067\u5341\u5206\u3067\u3059\u3002\u5927\u5bb9\u91cf\u306e\u30b5\u30fc\u30d0\u30fc\u3092\u904b\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u30d0\u30a4\u30c8\u5358\u4f4d\u306e\u5024\u3092\u4f7f\u7528\u3057\u305f\u65b9\u304c\u8a08\u753b\u304c\u7acb\u3066\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002.<\/p>\n\n<table>\n  <thead>\n    <tr>\n      <th>\u30d1\u30e9\u30e1\u30fc\u30bf<\/th>\n      <th>\u610f\u5473<\/th>\n      <th>\u4e00\u822c\u7684\u306a\u30c7\u30d5\u30a9\u30eb\u30c8<\/th>\n      <th>\u3044\u3064\u5909\u66f4\u3059\u308c\u3070\u3088\u3044\u3067\u3059\u304b\uff1f<\/th>\n      <th>\u30d2\u30f3\u30c8<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>vm.dirty_background_ratio<\/td>\n      <td>\u306e\u958b\u59cb <strong>\u80cc\u666f\u306e\u30d5\u30e9\u30c3\u30b7\u30e5<\/strong> \u30d1\u30fc\u30bb\u30f3\u30c8<\/td>\n      <td>\u2248 10%<\/td>\n      <td>\u30ec\u30a4\u30c6\u30f3\u30b7\u306e\u5909\u52d5\u3084\u3001\u975e\u5e38\u306b\u9ad8\u901f\u306aSSD\/NVMe\u306e\u5834\u5408<\/td>\n      <td>\u4f4e\u3044\u307b\u3069\u30ec\u30a4\u30c6\u30f3\u30b7\u304c\u4f4e\u304f\u306a\u308a\u3001\u9ad8\u3044\u307b\u3069\u30d0\u30c3\u30d5\u30a1\u5bb9\u91cf\u304c\u5897\u3048\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>vm.dirty_ratio<\/td>\n      <td>\u30cf\u30fc\u30c9 <strong>\u30b9\u30ed\u30c3\u30c8\u30eb\u9650\u754c<\/strong> \u30d1\u30fc\u30bb\u30f3\u30c8<\/td>\n      <td>\u2248 20\u201340%<\/td>\n      <td>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306f\u4f4e\u304f\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3067\u306f\u9ad8\u3044<\/td>\n      <td>\u9ad8\u3059\u304e\u308b \u2192 \u30d5\u30e9\u30c3\u30b7\u30e5\u6642\u306b\u30d6\u30ed\u30c3\u30af\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>vm.dirty_background_bytes<\/td>\n      <td>\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u30fb\u30d5\u30e9\u30c3\u30b7\u30e5\u306e\u958b\u59cb\u306f <strong>\u30d0\u30a4\u30c8<\/strong><\/td>\n      <td>Ratio\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u7121\u52b9\u306b\u3059\u308b<\/td>\n      <td>\u5927\u5bb9\u91cf\u306eRAM\u3001\u56fa\u5b9a\u306e\u30d0\u30c3\u30d5\u30a1\u5148<\/td>\n      <td>Ratio\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u7121\u52b9\u306b\u3059\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>vm.dirty_bytes<\/td>\n      <td>\u53b3\u3057\u3044\u300c\u30c9\u30ed\u30bb\u30eb\u300d\u5236\u9650\u304c <strong>\u30d0\u30a4\u30c8<\/strong><\/td>\n      <td>Ratio\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u7121\u52b9\u306b\u3059\u308b<\/td>\n      <td>\u5927\u5bb9\u91cf\u306eRAM\u3001\u8a2d\u5b9a\u53ef\u80fd\u306a\u4e0a\u9650<\/td>\n      <td>Ratio\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u7121\u52b9\u306b\u3059\u308b<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<h2>\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306e\u30b7\u30ca\u30ea\u30aa\u3068\u63a8\u5968\u4e8b\u9805<\/h2>\n\n<p>\u6b21\u306e\u3088\u3046\u306a\u9806\u6b21\u66f8\u304d\u8fbc\u307f\u8ca0\u8377 <strong>\u30d0\u30c3\u30af\u30a2\u30c3\u30d7<\/strong> \u5927\u304d\u306a\u30d0\u30c3\u30d5\u30a1\u3068\u9069\u5ea6\u306a\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u66f8\u304d\u8fbc\u307f\u306e\u6069\u6075\u3092\u53d7\u3051\u3089\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30ab\u30fc\u30cd\u30eb\u304c\u30e1\u30c7\u30a3\u30a2\u306b\u4e00\u62ec\u3057\u3066\u66f8\u304d\u8fbc\u307f\u3092\u884c\u3048\u308b\u305f\u3081\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u3001dirty_ratio \u309230\uff5e40\u30d1\u30fc\u30bb\u30f3\u30c8\u3001dirty_background_ratio \u309210\uff5e20\u30d1\u30fc\u30bb\u30f3\u30c8\u306b\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002 \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3084\u5c0f\u898f\u6a21\u306a\u30e9\u30f3\u30c0\u30e0I\/O\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u4e88\u6e2c\u53ef\u80fd\u306a\u30ec\u30a4\u30c6\u30f3\u30b7\u304c\u4e0d\u53ef\u6b20\u3067\u3042\u308b\u305f\u3081\u3001\u30cf\u30fc\u30c9\u30ec\u30a4\u30c6\u30f3\u30b7\u309210\uff5e15\uff05\u3001\u30bd\u30d5\u30c8\u30ec\u30a4\u30c6\u30f3\u30b7\u30923\uff5e5\uff05\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002 Web\u30b5\u30fc\u30d0\u30fc\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b5\u30fc\u30d0\u30fc\u304c\u6df7\u5728\u3059\u308b\u74b0\u5883\u3067\u306f\u3001\u30cf\u30fc\u30c915\uff5e20\uff05\u3001\u30bd\u30d5\u30c85\uff5e10\uff05\u304c\u826f\u597d\u306a\u59a5\u5354\u70b9\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u7bc4\u56f2\u306f\u3042\u304f\u307e\u3067\u51fa\u767a\u70b9\u3067\u3042\u308a\u3001\u6700\u7d42\u7684\u306b\u306f\u30b7\u30b9\u30c6\u30e0\u306e\u5b9f\u969b\u306e\u6e2c\u5b9a\u7d50\u679c\u304c\u91cd\u8981\u3068\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-schreibperformance-feintuning-5648.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306e\u5074\u9762\u3068\u30de\u30a6\u30f3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3<\/h2>\n<p>\u30e9\u30a4\u30c8\u30d0\u30c3\u30af\u30d1\u30b9\u306f\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3067\u7d42\u4e86\u3059\u308b\u2015\u2015\u305d\u306e\u6226\u7565\u304c\u30ec\u30a4\u30c6\u30f3\u30b7\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5de6\u53f3\u3059\u308b\u3002Ext4\u3067\u306f <em>data=ordered<\/em> (\u30c7\u30d5\u30a9\u30eb\u30c8) \u306f\u3001\u30b8\u30e3\u30fc\u30ca\u30eb\u306e\u30b3\u30df\u30c3\u30c8\u524d\u306b\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u307f\u307e\u3059\uff1b; <em>data=\u30e9\u30a4\u30c8\u30d0\u30c3\u30af<\/em> \u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u4f4e\u6e1b\u3057\u307e\u3059\u304c\u3001\u30af\u30e9\u30c3\u30b7\u30e5\u5f8c\u306b\u53e4\u3044\u30c7\u30fc\u30bf\u304c\u5931\u308f\u308c\u308b\u30ea\u30b9\u30af\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306f <code>\u30b3\u30df\u30c3\u30c8<\/code> \uff08\u79d2\uff09\u306f\u3001\u30b8\u30e3\u30fc\u30ca\u30eb\u306e\u6c38\u7d9a\u5316\u983b\u5ea6\u3092\u5236\u5fa1\u3057\u307e\u3059\u3002\u9593\u9694\u3092\u77ed\u304f\u3059\u308b\u3068\u30c7\u30fc\u30bf\u640d\u5931\u306f\u6e1b\u308a\u307e\u3059\u304c\u3001I\/O\u8ca0\u8377\u306f\u5897\u3048\u307e\u3059\u3002XFS\u306f\u6d17\u7df4\u3055\u308c\u305f\u30ed\u30b0\u8a2d\u8a08\u3092\u63a1\u7528\u3057\u3066\u304a\u308a\u3001\u5927\u898f\u6a21\u306a <em>\u30ed\u30b0\u30b5\u30a4\u30ba<\/em> \u307e\u305f\u3001\u9069\u5207\u306a\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306f\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u306e\u9ad8\u3044\u30b8\u30e7\u30d6\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002Btrfs\u306fCopy-on-Write\u306b\u3088\u3063\u3066\u66f8\u304d\u8fbc\u307f\u3092\u307e\u3068\u3081\u3066\u51e6\u7406\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u30ec\u30a4\u30c6\u30f3\u30b7\u304c\u5b89\u5b9a\u3057\u307e\u3059\u304c\u3001\u5c0f\u898f\u6a21\u306a\u30e9\u30f3\u30c0\u30e0\u66f8\u304d\u8fbc\u307f\u3084\u5bb9\u91cf\u306e\u9650\u3089\u308c\u305fSSD\u3067\u306f\u3001\u65ad\u7247\u5316\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u6b21\u306e\u3088\u3046\u306a\u30aa\u30d7\u30b7\u30e7\u30f3\u306f <em>nodatacow<\/em> \u30ec\u30a4\u30c6\u30f3\u30b7\u30fc\u306e\u6025\u4e0a\u6607\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3001\u7279\u5b9a\u306e\u30d1\u30b9\u3084\u5bfe\u8c61\u3092\u7d5e\u3063\u305f\u30c7\u30d5\u30e9\u30b0\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002.<\/p>\n<p>\u307e\u305f\u3001\u79c1\u306f\u4ee5\u4e0b\u306e\u70b9\u306b\u3082\u7559\u610f\u3057\u3066\u3044\u307e\u3059 <em>relatime<\/em>\/<em>\u30ce\u30fc\u30bf\u30a4\u30e0<\/em> \uff08\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u66f8\u304d\u8fbc\u307f\u3092\u524a\u6e1b\uff09\u3001, <em>\u6020\u3051\u8005<\/em> \uff08mtime\/atime \u306e\u66f4\u65b0\u304c\u9045\u5ef6\u3057\u3001\u3088\u308a\u6c38\u7d9a\u7684\u306b\u306a\u308b\uff09\u3053\u3068\u3001\u304a\u3088\u3073\u30b8\u30e3\u30fc\u30ca\u30ea\u30f3\u30b0\u30fb\u30d0\u30ea\u30a2\u3002\u7279\u306b RAID \u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u3084\u4eee\u60f3\u30de\u30b7\u30f3\uff08VM\uff09\u306b\u304a\u3044\u3066\u306f\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6319\u52d5\u304c\u9069\u5207\u3067\u3042\u308b\u3053\u3068\u304c\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002\u66f8\u304d\u8fbc\u307f\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u8a2d\u5b9a\u304c\u8aa4\u3063\u3066\u3044\u308b\u3068\u3001\u30c0\u30fc\u30c6\u30a3\u30fb\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306e\u52aa\u529b\u304c\u3059\u3079\u3066\u7121\u99c4\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002.<\/p>\n\n<h2>\u30c0\u30a4\u30ec\u30af\u30c8I\/O\u3001O_SYNC\u3001\u304a\u3088\u3073\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u6319\u52d5<\/h2>\n<p>\u3059\u3079\u3066\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u7d4c\u7531\u3059\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002 <code>O_DIRECT<\/code> \u6216\u3044\u306f <code>O_SYNC<\/code>\/<code>O_DSYNC<\/code> \u4e00\u90e8\u306e\u30d7\u30ed\u30bb\u30b9\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u4e00\u90e8\u3092\u8fc2\u56de\u3057\u305f\u308a\u3001\u5373\u6642\u306e\u6c38\u7d9a\u5316\u3092\u8981\u6c42\u3057\u305f\u308a\u3057\u307e\u3059\u3002 \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u901a\u5e38\u3001WAL\uff0f\u30ea\u30c9\u30a5\u30ed\u30b0\u3092\u540c\u671f\u7684\u306b\u66f8\u304d\u8fbc\u307f\u3001\u30c7\u30fc\u30bf\u9818\u57df\u3092\u975e\u540c\u671f\u7684\u306b\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002\u79c1\u306f\u7279\u306b\u975e\u540c\u671f\u30d1\u30b9\u5411\u3051\u306b\u30c0\u30fc\u30c6\u30a3\u95be\u5024\u3092\u8abf\u6574\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u540c\u671f\u30d1\u30b9\u306b\u3064\u3044\u3066\u306f\u9ad8\u901f\u306a\u30b8\u30e3\u30fc\u30ca\u30eb\uff08NVMe\u3001\u5c02\u7528LUN\uff09\u3092\u901a\u3058\u3066\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u4fdd\u8a3c\u3057\u3066\u3044\u307e\u3059\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u975e\u5e38\u306b\u983b\u7e41\u306b <code>fsync()<\/code> \u547c\u3073\u51fa\u3059\u5834\u5408\u3001\u5927\u304d\u306a\u30d0\u30c3\u30d5\u30a1\u306f\u3042\u307e\u308a\u5f79\u306b\u7acb\u3061\u307e\u305b\u3093\u3002\u305d\u306e\u5834\u5408\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u306f\u3001\u3088\u308a\u3082\u3080\u3057\u308d\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u3001\u30ad\u30e5\u30fc\u6df1\u5ea6\u3001\u304a\u3088\u3073I\/O\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306b\u5927\u304d\u304f\u4f9d\u5b58\u3059\u308b\u304b\u3089\u3067\u3059\u3002 <em>\u30c0\u30fc\u30c6\u30a3\u30ec\u30b7\u30aa<\/em>.<\/p>\n\n<h2>\u5b9f\u8df5\u7684\u306a\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306e\u624b\u9806<\/h2>\n\n<p>\u5909\u66f4\u3092\u884c\u3046\u305f\u3073\u306b\u3001\u79c1\u306f <strong>\u5b9f\u7e3e\u5024<\/strong> \u3092\u3082\u3063\u3066 <code>sysctl vm.dirty_ratio<\/code> \u305d\u3057\u3066 <code>sysctl vm.dirty_background_ratio<\/code>, \u3001\u73fe\u72b6\u3092\u8a18\u9332\u3059\u308b\u305f\u3081\u3067\u3059\u3002\u77ed\u671f\u7684\u306a\u30c6\u30b9\u30c8\u306e\u5834\u5408\u306f\u3001\u5024\u3092\u76f4\u63a5 <code>\/proc\/sys\/vm\/<\/code>\u4f8b\u3048\u3070 <code>echo 15 &gt; \/proc\/sys\/vm\/dirty_ratio<\/code> \u305d\u3057\u3066 <code>echo 5 &gt; \/proc\/sys\/vm\/dirty_background_ratio<\/code>. \u8abf\u6574\u304c\u6c38\u7d9a\u7684\u306a\u3082\u306e\u3067\u3042\u308b\u5834\u5408\u3001\u305d\u308c\u3092 <code>\/etc\/sysctl.conf<\/code> \u6216\u3044\u306f <code>\/etc\/sysctl.d\/*.conf<\/code>. \u5909\u66f4\u306f <code>sysctl -p<\/code> \u3059\u3050\u306b\u5b9f\u884c\u3057\u3001\u305d\u306e\u52b9\u679c\u3092\u901f\u3084\u304b\u306b\u6e2c\u5b9a\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u30eb\u30fc\u30eb\u306b\u3064\u3044\u3066\u3055\u3089\u306b\u6df1\u304f\u5b66\u3073\u305f\u3044\u65b9\u306b\u306f\u3001\u5b9f\u8df5\u7684\u306a\u30d2\u30f3\u30c8\u304c\u5f79\u7acb\u3061\u307e\u3059\u3002 <a href=\"https:\/\/webhosting.de\/ja\/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\/\">sysctl\u306e\u8abf\u6574<\/a> \u672c\u756a\u30b5\u30fc\u30d0\u30fc\u4e0a\u3067\u3002.<\/p>\n\n<h2>\u5024\u306e\u5c0e\u51fa\uff1a\u8a08\u7b97\u4f8b<\/h2>\n<p>\u79c1\u306f\u5177\u4f53\u7684\u306a\u6570\u5024\u304b\u3089\u59cb\u3081\u308b\u306e\u304c\u597d\u304d\u3067\u3059\u3002\u4f8b1\uff1a64 GB\u306eRAM\u3068NVMe\u3092\u642d\u8f09\u3057\u305fWeb\uff0f\u30a2\u30d7\u30ea\u30b5\u30fc\u30d0\u30fc\u3002\u76ee\u6a19\u306f\u4f4e\u30ec\u30a4\u30c6\u30f3\u30b7\u3067\u3059\u3002\u79c1\u306f <code>dirty_background_bytes=1073741824<\/code> (1 GB) \u304a\u3088\u3073 <code>dirty_bytes=3221225472<\/code> (3 GB)\u3002NVMe\u306e\u6301\u7d9a\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u304c2 GB\/s\u306e\u5834\u5408\u3001\u7a7a\u306b\u3059\u308b\u306e\u306b\u7d040.5\uff5e1.5\u79d2\u304b\u304b\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u306a\u8ca0\u8377\u306b\u306f\u9069\u3057\u3066\u3044\u307e\u3059\u3002 \u4f8b2\uff1a128 GB\u306eRAM\u3092\u642d\u8f09\u3057\u305f\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30ce\u30fc\u30c9\u3001800 MB\/s\u306e\u9ad8\u901fSATA-RAID\u3002\u79c1\u306f\u4ee5\u4e0b\u3092\u9078\u629e\u3057\u307e\u3059 <code>dirty_background_ratio=10<\/code>, <code>dirty_ratio=35<\/code>. \u7d76\u5bfe\u5024\u3067\u306f\u3001\u305d\u308c\u305e\u308c\u7d0412.8 GB\u306844.8 GB\u3067\u3042\u308a\u3001RAID\u306e\u7a7a\u306b\u3059\u308b\u51e6\u7406\u306b\u306f16\uff5e56\u79d2\u304b\u304b\u308a\u307e\u3059\u3002\u3053\u306e\u30b8\u30e7\u30d6\u306f\u5bfe\u8a71\u578b\u3067\u306f\u306a\u3044\u305f\u3081\u3001\u3053\u308c\u3067\u3082\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n<p>\u4f8b 3\uff1a256 GB \u306e RAM \u3092\u642d\u8f09\u3057\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b5\u30fc\u30d0\u30fc\u3002\u30b8\u30e3\u30fc\u30ca\u30eb\u306f NVMe \u306b\u3001\u30c7\u30fc\u30bf\u306f SSD \u30a2\u30ec\u30a4\u306b\u4fdd\u5b58\u3002\u7570\u5e38\u5024\u3092\u907f\u3051\u308b\u305f\u3081\u3001\u7d76\u5bfe\u5024\u3067\u5236\u9650\u3092\u8a2d\u5b9a\u3057\u307e\u3059\uff1a <code>dirty_background_bytes=2147483648<\/code> (2 GB)\u3001, <code>dirty_bytes=8589934592<\/code> (8 GB)\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30af\u30e9\u30c3\u30b7\u30e5\u30a6\u30a3\u30f3\u30c9\u30a6\u306e\u30b5\u30a4\u30ba\u3092\u4e88\u6e2c\u53ef\u80fd\u306b\u4fdd\u3061\u3001\u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c8\u901a\u904e\u6642\u306e\u6025\u30d6\u30ec\u30fc\u30ad\u3092\u8efd\u6e1b\u3057\u307e\u3059\u3002.<\/p>\n\n<h2>\u30e9\u30a4\u30c8\u30d0\u30c3\u30af\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u304a\u3088\u3073\u95a2\u9023\u30d1\u30e9\u30e1\u30fc\u30bf<\/h2>\n\n<p>\u95be\u5024\u4ee5\u5916\u306b\u3082\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u306e\u306f <strong>\u30bf\u30a4\u30de\u30fc<\/strong> \u30e9\u30a4\u30c8\u30d0\u30c3\u30af\u306e\u6319\u52d5\u3001\u3072\u3044\u3066\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u64cd\u4f5c\u611f\u3002\u3053\u308c\u306b\u3088\u3063\u3066 <code>vm.dirty_writeback_centisecs<\/code> \u30ab\u30fc\u30cd\u30eb\u30d5\u30e9\u30c3\u30b7\u30e3\u30fc\u3092\u8d77\u52d5\u3055\u305b\u308b\u9593\u9694\u3092\u5236\u5fa1\u3057\u3001\u4e00\u65b9 <code>vm.dirty_expire_centisecs<\/code> \u30c0\u30fc\u30c6\u30a3\u30da\u30fc\u30b8\u306e\u6700\u5927\u4fdd\u6301\u6642\u9593\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u9593\u9694\u3092\u77ed\u304f\u3059\u308b\u3068\u3001\u30d5\u30e9\u30c3\u30b7\u30e5\u306e\u983b\u5ea6\u306f\u9ad8\u304f\u306a\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u91cf\u306f\u5c11\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u9593\u9694\u3092\u9577\u304f\u3059\u308b\u3068I\/O\u547c\u3073\u51fa\u3057\u3092\u7bc0\u7d04\u3067\u304d\u307e\u3059\u304c\u3001\u3088\u308a\u5927\u304d\u306a\u30d0\u30c3\u30c1\u306b\u306a\u308b\u30ea\u30b9\u30af\u304c\u3042\u308a\u307e\u3059\u3002 \u79c1\u306f\u3001\u9ad8\u901f\u306aNVMe\u30c9\u30e9\u30a4\u30d6\u3067\u306e\u30d5\u30e9\u30c3\u30b7\u30e5\u9593\u9694\u304c\u9577\u3059\u304e\u308b\u306a\u3069\u3001\u6e2c\u5b9a\u7d50\u679c\u306b\u660e\u3089\u304b\u306a\u30c7\u30e1\u30ea\u30c3\u30c8\u304c\u793a\u3055\u308c\u305f\u5834\u5408\u306b\u306e\u307f\u3001\u3053\u308c\u3089\u306e\u5024\u3092\u8abf\u6574\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u4f53\u7cfb\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u3068\u308b\u3053\u3068\u3067\u3001\u66f8\u304d\u8fbc\u307f\u30d0\u30c3\u30af\u306e\u6d3b\u52d5\u304c\u904e\u5ea6\u306b\u6d3b\u767a\u306b\u306a\u3063\u305f\u308a\u3001\u9006\u306b\u920d\u3059\u304e\u305f\u308a\u3059\u308b\u3068\u3044\u3063\u305f\u63fa\u308c\u52d5\u304d\u3092\u56de\u907f\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\/linux_performance_finetune_4821.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u3068\u5fae\u8abf\u6574<\/h2>\n\n<p>\u8abf\u6574\u3092\u884c\u3063\u305f\u5f8c\u3001\u79c1\u306f\u89b3\u5bdf\u3057\u3066\u3044\u308b <strong>\u7d99\u7d9a\u7684<\/strong> \u6210\u679c\u3084\u526f\u4f5c\u7528\u3092\u53ef\u8996\u5316\u3059\u308b\u305f\u3081\u306e\u6307\u6a19\u3002 <code>\/proc\/meminfo<\/code> \u300cDirty\u300d\u3068\u300cWriteback\u300d\u3092\u78ba\u8a8d\u3057\u3066\u3001\u30d0\u30c3\u30d5\u30a1\u306e\u72b6\u614b\u3084\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u30d5\u30e9\u30c3\u30b7\u30e5\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002iostat\u3001sar\u3001atop \u306a\u3069\u306e\u30c4\u30fc\u30eb\u3092\u4f7f\u3048\u3070\u3001\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3001\u30ad\u30e5\u30fc\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u306e\u50be\u5411\u3092\u628a\u63e1\u3067\u304d\u307e\u3059\u3002\u30e1\u30c8\u30ea\u30af\u30b9\u306b\u95a2\u3059\u308b\u9069\u5207\u306a\u5165\u9580\u60c5\u5831\u3068\u3057\u3066\u3001\u3053\u3061\u3089\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-io-%e5%be%85%e6%a9%9f-%e5%88%86%e6%9e%90-iostat-vmstat-%e3%83%a1%e3%83%88%e3%83%aa%e3%82%af%e3%82%b9-%e3%83%87%e3%82%a3%e3%82%b9%e3%82%af\/\">I\/O\u5f85\u6a5f\u6642\u9593\u306e\u5206\u6790<\/a>. \u307e\u305a\u3053\u306e\u30c7\u30fc\u30bf\u306b\u57fa\u3065\u3044\u3066\u3001\u4e88\u671f\u305b\u306c\u526f\u4f5c\u7528\u304c\u751f\u3058\u306a\u3044\u3088\u3046\u306b\u3001\u6bb5\u968e\u7684\u306b\u5236\u9650\u3092\u7de9\u548c\u307e\u305f\u306f\u5f37\u5316\u3057\u3066\u3044\u304d\u307e\u3059\u3002.<\/p>\n\n<h2>\u30b3\u30f3\u30c6\u30ca\u3001cgroups\u3001\u304a\u3088\u3073\u516c\u5e73\u306a\u30ea\u30bd\u30fc\u30b9\u914d\u5206<\/h2>\n<p>\u30b3\u30f3\u30c6\u30ca\u74b0\u5883\u3067\u306f\u3001\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306f\u540c\u3058\u30ab\u30fc\u30cd\u30eb\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u5171\u6709\u3057\u307e\u3059\u3002Cgroup-Writeback \u306f\u3001\u30c0\u30fc\u30c6\u30a3\u30da\u30fc\u30b8\u3092\u305d\u306e\u767a\u751f\u6e90\u306b\u78ba\u5b9f\u306b\u5272\u308a\u5f53\u3066\u308b\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002 \u500b\u3005\u306e\u30c6\u30ca\u30f3\u30c8\u304c\u904e\u5ea6\u306b\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3092\u884c\u3046\u5834\u5408\u3001cgroups\u306eI\/O\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\uff08blkcg\uff09\u3092\u4f7f\u7528\u3057\u3066\u3001\u30b3\u30f3\u30c6\u30ca\u3054\u3068\u306e\u5e2f\u57df\u5e45\u3084IOPS\u3092\u5236\u9650\u3057\u3066\u3044\u307e\u3059\u3002\u30db\u30b9\u30c8\u30ec\u30d9\u30eb\u3067\u306e\u7d76\u5bfe\u30d0\u30a4\u30c8\u6570\u5236\u9650\uff08<em>\u30c0\u30fc\u30c6\u30a3\u30d0\u30a4\u30c8<\/em>) 1\u4eba\u306e\u30b2\u30b9\u30c8\u304c\u300c\u30c0\u30fc\u30c6\u30a3\u30fb\u30d0\u30b8\u30a7\u30c3\u30c8\u300d\u306e\u5168\u91cf\u3092\u98df\u3044\u5c3d\u304f\u3059\u306e\u3092\u9632\u3050\u3002\u3055\u3089\u306b\u3001\u4ee5\u4e0b\u3092\u901a\u3058\u3066\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u5236\u9650\u3057\u3066\u3044\u308b\u3002 <code>\u30e1\u30e2\u30ea.max<\/code>, \u3001\u3053\u308c\u306b\u3088\u308a\u3001Writeback\u304c\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u8ca0\u8377\u304c\u304b\u304b\u3063\u3066\u304b\u3089\u521d\u3081\u3066\u53cd\u5fdc\u3059\u308b\u306e\u3092\u9632\u3050\u305f\u3081\u3067\u3059\u3002\u76ee\u6a19\u306f\u5909\u308f\u308a\u307e\u305b\u3093\u3002\u30b2\u30b9\u30c8\u306e\u8ca0\u8377\u304c\u3001\u30db\u30b9\u30c8\u5168\u4f53\u306e <em>\u30c0\u30fc\u30c6\u30a3\u30ec\u30b7\u30aa<\/em> \u5f37\u5236\u3059\u308b\u3002.<\/p>\n\n<h2>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u74b0\u5883\u3068VM<\/h2>\n\n<p>\u30de\u30eb\u30c1\u30c6\u30ca\u30f3\u30c8\u74b0\u5883\u3084VM\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u3057\u3066\u3044\u307e\u3059 <strong>\u30aa\u30fc\u30d0\u30fc\u30d6\u30c3\u30ad\u30f3\u30b0<\/strong> RAM\u3068I\/O\u306b\u3064\u3044\u3066\u306f\u3001\u30d1\u30fc\u30bb\u30f3\u30c6\u30fc\u30b8\u5236\u9650\u304c\u7570\u306a\u308b\u5f71\u97ff\u3092\u53ca\u307c\u3059\u305f\u3081\u3067\u3059\u3002\u7d76\u5bfe\u30d0\u30a4\u30c8\u6570\u306b\u3088\u308b\u5236\u9650\u3092\u8a2d\u3051\u308b\u3053\u3068\u3067\u3001\u500b\u3005\u306e\u30b2\u30b9\u30c8\u304c\u904e\u5270\u306a\u30d0\u30c3\u30d5\u30a1\u3092\u84c4\u7a4d\u3057\u3066\u3001\u96a3\u63a5\u3059\u308b\u30b2\u30b9\u30c8\u306e\u51e6\u7406\u3092\u9045\u3089\u305b\u308b\u306e\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u307e\u305f\u3001\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u91cd\u8907\u6392\u9664\u3001\u30d0\u30eb\u30fc\u30cb\u30f3\u30b0\u3001\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30ad\u30e3\u30c3\u30b7\u30e5\u3082\u8003\u616e\u306b\u5165\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u52b9\u679c\u306b\u91cd\u7573\u3057\u3066\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u305f\u3081\u3067\u3059\u3002\u30de\u30cd\u30fc\u30b8\u30c9\u30b5\u30fc\u30d0\u30fc\u306e\u5834\u5408\u3001\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u304c\u9069\u5207\u306a\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u9867\u5ba2\u306f\u5b89\u5b9a\u3057\u305f\u5fdc\u7b54\u6642\u9593\u3092\u4f53\u9a13\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u305d\u306e\u4fa1\u5024\u306f\u5341\u5206\u306b\u3042\u308a\u307e\u3059\u3002 \u72ec\u81ea\u306e\u30ce\u30fc\u30c9\u3092\u904b\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u30af\u30e9\u30b9\u3054\u3068\u306b\u660e\u78ba\u306b\u5b9a\u7fa9\u3055\u308c\u305f\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u8a2d\u5b9a\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u30e1\u30ea\u30c3\u30c8\u304c\u5f97\u3089\u308c\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\/DirtyRatioTuning1234.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u3088\u304f\u3042\u308b\u8aa4\u89e3\u3068\u969c\u5bb3<\/h2>\n<ul>\n  <li><strong>\u201e\u300c\u30d0\u30c3\u30d5\u30a1\u304c\u5897\u3048\u308c\u3070\u3001\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3082\u307e\u3059\u307e\u3059\u5411\u4e0a\u3059\u308b\u3002\u300d\u201c<\/strong> \u30e9\u30f3\u30c0\u30e0\u306a\u8ca0\u8377\u304c\u591a\u3044\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u3084\u3001\u30ad\u30e5\u30fc\u6df1\u5ea6\u304c\u5c0f\u3055\u3044\u30c7\u30d0\u30a4\u30b9\u3067\u306f\u4e0d\u9069\u5207\u3067\u3059\u3002\u30d0\u30c3\u30d5\u30a1\u304c\u5927\u304d\u3059\u304e\u308b\u3068\u3001\u30d5\u30e9\u30c3\u30b7\u30e5\u30d0\u30fc\u30b9\u30c8\u3084\u30ad\u30e5\u30fc\u306e\u6ede\u7559\u304c\u767a\u751f\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>\u201e\u300cdirty_ratio\u306fReads\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u305b\u3093\u3002\u300d\u201c<\/strong> \u9593\u63a5\u7684\u306b\u306f\u305d\u3046\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002\u6fc0\u3057\u3044\u30e9\u30a4\u30c8\u30d0\u30c3\u30af\u51e6\u7406\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u30da\u30fc\u30b8\u3092\u8ffd\u3044\u51fa\u3057\u3001\u8aad\u307f\u53d6\u308a\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u5897\u52a0\u3055\u305b\u307e\u3059\u3002.<\/li>\n  <li><strong>\u201e\u300c\u30d0\u30a4\u30c8\u3068\u7406\u6027\u306f\u76f8\u4e57\u52b9\u679c\u3092\u751f\u3080\u3002\u300d\u201c<\/strong> \u3044\u3044\u3048\u3002Bytes\u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3059\u308b\u3068\u3001\u305d\u308c\u306b\u5bfe\u5fdc\u3059\u308bRatio\u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u306f\u7121\u52b9\u306b\u306a\u308a\u307e\u3059\u3002\u4e00\u610f\u6027\u3092\u4fdd\u3064\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/li>\n  <li><strong>\u201e\u300cfsync() \u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u30c0\u30fc\u30c6\u30a3\u30fb\u30ea\u30df\u30c3\u30c8\u306f\u610f\u5473\u3092\u306a\u3055\u306a\u304f\u306a\u308b\u3002\u300d\u201c<\/strong> \u3044\u3044\u3048\u3002\u983b\u7e41\u306b\u540c\u671f\u3092\u884c\u3046\u3068\u30ea\u30b9\u30af\u306e\u767a\u751f\u671f\u9593\u306f\u77ed\u7e2e\u3055\u308c\u307e\u3059\u304c\u3001\u6b8b\u308a\u306e\u8ca0\u8377\u306b\u3064\u3044\u3066\u306f\u5f15\u304d\u7d9a\u304d\u8a31\u5bb9\u9650\u754c\u5024\u304c\u9069\u7528\u3055\u308c\u307e\u3059\u3002.<\/li>\n  <li><strong>\u201e\u300c\u9ad8\u901f\u306a\u30c7\u30fc\u30bf\u30b9\u30c8\u30ec\u30fc\u30b8\u304c\u3042\u308c\u3070\u3001\u4f55\u3067\u3082\u89e3\u6c7a\u3059\u308b\u3002\u300d\u201c<\/strong> \u305f\u3060\u3057\u3001\u30d6\u30ed\u30c3\u30af\u30ec\u30a4\u30e4\u30fc\u304c\u5e2f\u57df\u5236\u9650\u3092\u884c\u3063\u3066\u3044\u308b\u5834\u5408\uff08WBT\uff09\u3084\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306e\u30de\u30a6\u30f3\u30c8\u8a2d\u5b9a\u304c\u6700\u9069\u3067\u306a\u3044\u5834\u5408\u306f\u4f8b\u5916\u3067\u3059\u3002.<\/li>\n  <li><strong>\u201e\u300cDrop_caches \u306f\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u30c4\u30fc\u30eb\u3067\u3059\u3002\u300d\u201c<\/strong> \u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30a2\u3059\u308b\u3068\u3001\u6e2c\u5b9a\u5024\u304c\u6b6a\u307f\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u30fc\u306e\u6025\u4e0a\u6607\u3092\u60aa\u5316\u3055\u305b\u307e\u3059\u3002\u672c\u756a\u74b0\u5883\u3067\u306f\u3001\u3053\u308c\u3092\u907f\u3051\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002.<\/li>\n<\/ul>\n\n<h2>\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\uff1a\u5178\u578b\u7684\u306a\u75c7\u72b6\u3068\u5bfe\u51e6\u6cd5<\/h2>\n\n<p>\u5c71\u7a4d\u307f <strong>\u9045\u5ef6\u30d4\u30fc\u30af<\/strong>, \u3001\u307e\u305a\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u306e\u3057\u304d\u3044\u5024\u3092\u4e0b\u3052\u3066\u3001\u30d5\u30e9\u30c3\u30b7\u30e5\u51e6\u7406\u304c\u3088\u308a\u65e9\u304f\u958b\u59cb\u3055\u308c\u3001\u5927\u898f\u6a21\u306a\u66f8\u304d\u8fbc\u307f\u306e\u6ce2\u304c\u767a\u751f\u3057\u306b\u304f\u304f\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u65ad\u7d9a\u7684\u306b\u505c\u6b62\u3059\u308b\u5834\u5408\u306f\u3001\u901a\u5e38\u3001\u30cf\u30fc\u30c9\u30ea\u30df\u30c3\u30c8\u304c\u9ad8\u3059\u304e\u308b\u304b\u3001\u3042\u308b\u3044\u306f\u30b9\u30c8\u30ec\u30fc\u30b8\u30e1\u30c7\u30a3\u30a2\u304c\u767a\u751f\u3059\u308b\u30d5\u30e9\u30c3\u30b7\u30e5\u30d0\u30fc\u30b9\u30c8\u306b\u5bfe\u5fdc\u3057\u304d\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u304c\u539f\u56e0\u3067\u3059\u3002 \u305d\u306e\u3088\u3046\u306a\u5834\u5408\u306f\u3001dirty_ratio\u3092\u4e0b\u3052\u3001\u30ea\u30fc\u30c9\u30a2\u30d8\u30c3\u30c9\u306e\u8a2d\u5b9a\u3092\u78ba\u8a8d\u3057\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306e\u30b8\u30e3\u30fc\u30ca\u30ea\u30f3\u30b0\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u898b\u76f4\u3057\u307e\u3059\u3002\u975e\u5e38\u306b\u9ad8\u901f\u306aNVMe\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306e\u5834\u5408\u306f\u3001\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3092\u4eba\u70ba\u7684\u306b\u5236\u9650\u3057\u306a\u3044\u3088\u3046\u3001\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u306e\u3057\u304d\u3044\u5024\u3092\u6bb5\u968e\u7684\u306b\u5f15\u304d\u4e0a\u3052\u307e\u3059\u3002 \u5909\u66f4\u3092\u884c\u3046\u305f\u3073\u306b\u3001\u76f4\u611f\u3067\u306f\u306a\u304f\u6e2c\u5b9a\u7d50\u679c\u306b\u57fa\u3065\u3044\u3066\u5bfe\u5fdc\u3057\u307e\u3059\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" 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