{"id":16421,"date":"2025-12-31T18:20:15","date_gmt":"2025-12-31T17:20:15","guid":{"rendered":"https:\/\/webhosting.de\/filesystem-caching-linux-page-cache-cacheboost\/"},"modified":"2025-12-31T18:20:15","modified_gmt":"2025-12-31T17:20:15","slug":"%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%b7%e3%82%b9%e3%83%86%e3%83%a0%e3%82%ad%e3%83%a3%e3%83%83%e3%82%b7%e3%83%a5%e3%80%81linux%e3%83%9a%e3%83%bc%e3%82%b8%e3%82%ad%e3%83%a3%e3%83%83%e3%82%b7","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/filesystem-caching-linux-page-cache-cacheboost\/","title":{"rendered":"Linux \u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3051\u308b\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u30ad\u30e3\u30c3\u30b7\u30e5\uff1a\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6b63\u3057\u304f\u7406\u89e3\u3059\u308b"},"content":{"rendered":"<p>Linux \u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u3001\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u308b\u30c7\u30fc\u30bf\u3092 RAM \u306b\u4fdd\u6301\u3059\u308b\u3053\u3068\u3067\u3001\u9ad8\u4fa1\u306a\u30c7\u30d0\u30a4\u30b9\u30a2\u30af\u30bb\u30b9\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u3001\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306e\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u53d6\u308a\u304a\u3088\u3073\u66f8\u304d\u8fbc\u307f\u306e\u901f\u5ea6\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002\u305d\u306e\u4ed5\u7d44\u307f\u306b\u3064\u3044\u3066\u3054\u8aac\u660e\u3057\u307e\u3059\u3002 <strong>\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0<\/strong> Linux \u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u3067\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u6a5f\u80fd\u3057\u307e\u3059\u3002\u91cd\u8981\u306a\u6307\u6a19\u3068\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u65e5\u5e38\u7684\u306b\u7ba1\u7406\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3054\u8aac\u660e\u3057\u307e\u3059\u3002 <strong>\u30b5\u30fc\u30d0\u30fc<\/strong>\u8ca0\u8377\u3092\u5897\u3084\u3059\u3002.<\/p>\n\n<h2>\u4e2d\u5fc3\u70b9<\/h2>\n<ul>\n  <li><strong>\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5<\/strong> \u30d5\u30a1\u30a4\u30eb\u30d6\u30ed\u30c3\u30af\u3092 RAM \u306b\u4fdd\u6301\u3057\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u524a\u6e1b\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>\u30c0\u30fc\u30c6\u30a3\u30da\u30fc\u30b8<\/strong> \u66f8\u304d\u8fbc\u307f\u30a2\u30af\u30bb\u30b9\u3092\u53ce\u96c6\u3057\u3001\u307e\u3068\u3081\u3066\u66f8\u304d\u623b\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>LRU<\/strong>-\u6226\u7565\u306f\u3001\u65b0\u3057\u3044\u30c7\u30fc\u30bf\u306e\u305f\u3081\u306b\u53e4\u3044\u30a8\u30f3\u30c8\u30ea\u3092\u524a\u9664\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0<\/strong> free\u3001\/proc\/meminfo\u3001vmstat\u3001iostat \u3092\u4f7f\u7528\u3059\u308b\u3068\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002.<\/li>\n  <li><strong>\u6700\u9069\u5316<\/strong> RAM\u3001\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8\u3001Opcache\u3001\u304a\u3088\u3073\u9069\u5207\u306a\u5236\u9650\u306b\u3088\u3063\u3066\u3002.<\/li>\n<\/ul>\n\n<h2>Linux \u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h2>\n<p>Linux \u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u3001\u983b\u7e41\u306b\u8aad\u307f\u8fbc\u307e\u308c\u308b\u30d5\u30a1\u30a4\u30eb\u30d6\u30ed\u30c3\u30af\u3092\u30e1\u30e2\u30ea\u306b\u4fdd\u5b58\u3057\u3001\u305d\u308c\u306b\u3088\u308a\u3001\u305d\u306e\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u518d\u30a2\u30af\u30bb\u30b9\u3092\u9ad8\u901f\u5316\u3057\u307e\u3059\u3002 <strong>\u30d5\u30a1\u30a4\u30eb<\/strong>. RAM\u30a2\u30af\u30bb\u30b9\u306f\u30de\u30a4\u30af\u30ed\u79d2\u5358\u4f4d\u3067\u5b9f\u884c\u3055\u308c\u308b\u306e\u306b\u5bfe\u3057\u3001\u9ad8\u901f\u306eSSD\u3067\u3055\u3048\u30df\u30ea\u79d2\u5358\u4f4d\u306e\u6642\u9593\u3092\u5fc5\u8981\u3068\u3059\u308b\u305f\u3081\u3001\u660e\u3089\u304b\u306b\u9045\u3044\u305f\u3081\u3001\u79c1\u306f\u3059\u3050\u306b\u305d\u306e\u6069\u6075\u3092\u53d7\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <strong>\u30e1\u30e2\u30ea<\/strong> RAM \u3067\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\u3068\u3001\u30ab\u30fc\u30cd\u30eb\u306f\u8aad\u307f\u8fbc\u3093\u3060\u30d6\u30ed\u30c3\u30af\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\u3057\u3001\u4eca\u5f8c\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u306f\u30e1\u30e2\u30ea\u304b\u3089\u76f4\u63a5\u5fdc\u7b54\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u5bfe\u3057\u3066\u900f\u904e\u7684\u306b\u6a5f\u80fd\u3059\u308b\u305f\u3081\u3001\u4f55\u3082\u8abf\u6574\u3084\u518d\u8a2d\u5b9a\u3092\u884c\u3046\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002Web \u30b5\u30fc\u30d0\u30fc\u3001PHP-FPM\u3001\u753b\u50cf\u914d\u4fe1\u3001\u30ed\u30b0\u8aad\u307f\u53d6\u308a\u30d7\u30ed\u30bb\u30b9\u306a\u3069\u306e\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306f\u3001\u5e38\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3001I\/O \u3092\u7bc0\u7d04\u3057\u307e\u3059\u3002.<\/p>\n\n<h2>\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u8aad\u307f\u53d6\u308a\u6642\u306b\u3053\u306e\u3088\u3046\u306b\u52d5\u4f5c\u3057\u307e\u3059<\/h2>\n<p>\u30d5\u30a1\u30a4\u30eb\u3092\u521d\u3081\u3066\u8aad\u307f\u8fbc\u3080\u3068\u304d\u3001\u30b7\u30b9\u30c6\u30e0\u306f\u30d6\u30ed\u30c3\u30af\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u8aad\u307f\u8fbc\u307f\u3001\u305d\u308c\u3089\u3092\u30db\u30c3\u30c8\u3068\u3057\u3066\u30de\u30fc\u30af\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u7e70\u308a\u8fd4\u3057\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3082\u5229\u7528\u53ef\u80fd\u3067\u3042\u308a\u3001 <strong>\u6642\u9593<\/strong> 2\u756a\u76ee\u306e\u8981\u4ef6\u3067\u306f\u3001\u975e\u5e38\u306b\u77ed\u3044\u6642\u9593\u3057\u304b\u304b\u304b\u308a\u307e\u305b\u3093\u3002100 MB \u306e\u30d5\u30a1\u30a4\u30eb\u3092 2 \u56de\u7d9a\u3051\u3066\u8aad\u307f\u8fbc\u3080\u3068\u30012 \u56de\u76ee\u306f\u5b9f\u8cea\u7684\u306b RAM \u304b\u3089\u5b8c\u5168\u306b\u8aad\u307f\u8fbc\u307e\u308c\u307e\u3059\u3002 \u30ab\u30fc\u30cd\u30eb\u306f\u3001LRU\uff08Least Recently Used\uff09\u306a\u3069\u306e\u6226\u7565\u3092\u63a1\u7528\u3057\u3001\u6700\u5f8c\u306b\u4f7f\u7528\u3055\u308c\u305f\u30a8\u30f3\u30c8\u30ea\u3092\u512a\u5148\u7684\u306b\u51e6\u7406\u3059\u308b\u3053\u3068\u3067\u3001\u6700\u65b0\u306e Web \u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u9577\u304f\u4fdd\u6301\u3057\u3001\u4f7f\u7528\u983b\u5ea6\u306e\u4f4e\u3044\u30c7\u30fc\u30bf\u3092\u6392\u9664\u3057\u307e\u3059\u3002\u3053\u306e\u30ed\u30b8\u30c3\u30af\u306f\u3001\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306e\u30d1\u30bf\u30fc\u30f3\u306b\u3046\u307e\u304f\u9069\u5408\u3057\u307e\u3059\u3002\u306a\u305c\u306a\u3089\u3001\u591a\u304f\u306e\u8a2a\u554f\u8005\u306f\u3001\u79c1\u304c <strong>\u30ad\u30e3\u30c3\u30b7\u30e5<\/strong> \u8fc5\u901f\u306b\u914d\u4fe1\u3057\u307e\u3059\u3002\u30d2\u30c3\u30c8\u7387\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30a4\u30ba\u3001\u3064\u307e\u308a\u5229\u7528\u53ef\u80fd\u306a RAM \u306b\u3088\u3063\u3066\u5897\u52a0\u3057\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\/2025\/12\/linux-pagecache-server-7192.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u66f8\u304d\u8fbc\u307f\u3068\u30c0\u30fc\u30c6\u30a3\u30da\u30fc\u30b8\u306b\u3064\u3044\u3066\u308f\u304b\u308a\u3084\u3059\u304f\u8aac\u660e<\/h2>\n<p>\u66f8\u304d\u8fbc\u307f\u6642\u306b\u306f\u3001\u30c7\u30fc\u30bf\u306f\u307e\u305a\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u30c0\u30fc\u30c6\u30a3\u30da\u30fc\u30b8\u3068\u3057\u3066\u4fdd\u5b58\u3055\u308c\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u30ab\u30fc\u30cd\u30eb\u304c\u307e\u3060\u30c7\u30a3\u30b9\u30af\u306b\u66f8\u304d\u623b\u3057\u3066\u3044\u306a\u3044\u5909\u66f4\u3055\u308c\u305f\u30d6\u30ed\u30c3\u30af\u3068\u3057\u3066\u4fdd\u5b58\u3055\u308c\u3001\u79c1\u306f <strong>\u30e9\u30a4\u30c8\u30d0\u30c3\u30af<\/strong>-\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u30bf\u30a4\u30e0\u30ea\u30fc\u306b\u540c\u671f\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u52d5\u4f5c\u306f\u30e9\u30a4\u30d6\u3067\u7c21\u5358\u306b\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002dd \u3092\u4f7f\u7528\u3057\u3066 10 MB \u306e\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3059\u308b\u3068\u3001\u30ab\u30fc\u30cd\u30eb\u304c SSD \u306b\u4e00\u62ec\u3067\u66f8\u304d\u8fbc\u3080\u307e\u3067\u3001\u30c0\u30fc\u30c6\u30a3\u5024\u304c\u4e0a\u6607\u3057\u307e\u3059\u3002 \u624b\u52d5\u3067 sync \u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u30b7\u30b9\u30c6\u30e0\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u4e00\u8cab\u6027\u3092\u78ba\u4fdd\u3057\u3001\u30c0\u30fc\u30c6\u30a3\u30e1\u30c8\u30ea\u30c3\u30af\u3092\u30bc\u30ed\u306b\u30ea\u30bb\u30c3\u30c8\u3057\u307e\u3059\u3002\u3053\u306e\u30d0\u30f3\u30c9\u30eb\u306f\u3001\u591a\u304f\u306e\u5c0f\u3055\u306a\u64cd\u4f5c\u3092\u5927\u304d\u306a\u8ee2\u9001\u306b\u307e\u3068\u3081\u3001I\/O \u3092\u7bc0\u7d04\u3057\u307e\u3059\u3002 <strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/strong> \u66f8\u304d\u8fbc\u307f\u30d7\u30ed\u30bb\u30b9\u3054\u3068\u306b\u6539\u5584\u3055\u308c\u307e\u3059\u3002\u6700\u65b0\u306e\u30c7\u30d0\u30a4\u30b9\u3054\u3068\u306e\u30e9\u30a4\u30c8\u30d0\u30c3\u30af\u30a2\u30d7\u30ed\u30fc\u30c1\u306b\u3088\u308a\u3001\u4e26\u5217\u30c7\u30a3\u30b9\u30af\u304c\u72ec\u7acb\u3057\u3066\u52d5\u4f5c\u3057\u3001\u5f85\u3061\u6642\u9593\u304c\u77ed\u7e2e\u3055\u308c\u307e\u3059\u3002.<\/p>\n\n<h2>\u30ad\u30e3\u30c3\u30b7\u30e5\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\uff1aDentry\/Inode \u5bfe \u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5<\/h2>\n<p>\u5168\u4f53\u50cf\u3068\u3057\u3066\u306f\u3001Linux \u306f\u30d5\u30a1\u30a4\u30eb\u30c7\u30fc\u30bf\u3060\u3051\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u5b9f\u969b\u306e <strong>\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5<\/strong> \u30b3\u30f3\u30c6\u30f3\u30c4\u306b\u306f\u3001\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u69cb\u9020\u3001\u30d5\u30a1\u30a4\u30eb\u540d\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u3092 RAM \u306b\u4fdd\u6301\u3059\u308b Dentry \u30ad\u30e3\u30c3\u30b7\u30e5\u3068 Inode \u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u3001\u9ad8\u4fa1\u306a\u30d1\u30b9\u89e3\u6c7a\u3084 Inode \u691c\u7d22\u3092\u7bc0\u7d04\u3057\u307e\u3059\u3002 <em>free -m<\/em> \u3053\u308c\u3089\u306e\u6301\u5206\u306e\u4fa1\u5024\u306f <strong>\u30ad\u30e3\u30c3\u30b7\u30e5<\/strong> \u307e\u305f\u3001 <strong>\u30d0\u30c3\u30d5\u30a1<\/strong> \u3080\u3057\u308d\u30d6\u30ed\u30c3\u30af\u30c7\u30d0\u30a4\u30b9\u95a2\u9023\u306e\u30d0\u30c3\u30d5\u30a1\u3092\u610f\u5473\u3057\u307e\u3059\u3002\/proc\/meminfo \u3067\u306f\u3001\u3088\u308a\u8a73\u7d30\u306b\u5206\u985e\u3055\u308c\u3066\u3044\u307e\u3059\uff08\u4f8b\uff1aDentries\u3001Inactive(file)\u3001Active(file)\uff09\u3002\u591a\u304f\u306e\u5c0f\u3055\u306a\u30d5\u30a1\u30a4\u30eb\u3092\u542b\u3080\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306e\u5834\u5408\u3001\u3053\u308c\u3089\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u3001HTTP \u30ea\u30af\u30a8\u30b9\u30c8\u3054\u3068\u306e\u5b9f\u969b\u306e\u30c7\u30d0\u30a4\u30b9\u30a2\u30af\u30bb\u30b9\u6570\u3092\u3055\u3089\u306b\u524a\u6e1b\u3059\u308b\u305f\u3081\u3001\u4e0d\u53ef\u6b20\u3067\u3059\u3002.<\/p>\n\n<h2>\u6307\u6a19\u3092\u6b63\u3057\u304f\u8aad\u307f\u53d6\u308b<\/h2>\n<p>\u307e\u305a free -m \u3092\u78ba\u8a8d\u3057\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5217\u3068 Mem \u304a\u3088\u3073 Swap \u306e\u884c\u306b\u6ce8\u76ee\u3057\u3066\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u52b9\u679c\u3092\u78ba\u5b9f\u306b\u8a55\u4fa1\u3057\u3001\u5b9f\u969b\u306e <strong>\u4f7f\u7528\u65b9\u6cd5<\/strong> \u7406\u89e3\u3059\u308b\u3002\/proc\/meminfo \u304b\u3089\u3001Cached\u3001Dirty\u3001Writeback\u3001Buffers \u306a\u3069\u306e\u5024\u3092\u8aad\u307f\u53d6\u308a\u3001\u3053\u308c\u3089\u3092\u7dcf\u5408\u3057\u3066\u30e1\u30e2\u30ea\u306e\u72b6\u614b\u3092\u628a\u63e1\u3057\u307e\u3059\u3002vmstat 1 \u306f\u3001\u30b7\u30b9\u30c6\u30e0\u304c I\/O \u3092\u5f85\u6a5f\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u5e38\u6642\u8868\u793a\u3057\u3001iostat \u306f\u30c7\u30d0\u30a4\u30b9\u3054\u3068\u306e\u8a73\u7d30\u60c5\u5831\u3092\u88dc\u8db3\u3057\u307e\u3059\u3002\u91cd\u8981\u306a\u70b9\uff1aLinux \u306f\u7a7a\u304d RAM \u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u3057\u3066\u4f7f\u7528\u3057\u307e\u3059\u304c\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3059\u3050\u306b\u305d\u308c\u3092\u8981\u6c42\u3067\u304d\u308b\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u4e00\u6642\u7684\u306b\u4f7f\u7528\u6e08\u307f\u3068\u3057\u3066\u30de\u30fc\u30af\u3057\u307e\u3059\u3002 \u3057\u305f\u304c\u3063\u3066\u3001\u79c1\u306f\u5e38\u306b\u3001\u4ee5\u4e0b\u3092\u542b\u3080\u5168\u4f53\u7684\u306a\u72b6\u6cc1\u3092\u8a55\u4fa1\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u30ef\u30fc\u30af\u30ed\u30fc\u30c9<\/strong> \u5358\u4e00\u306e\u6570\u5b57\u3060\u3051\u3067\u306f\u306a\u304f\u3002.<\/p>\n<table>\n  <thead>\n    <tr>\n      <th>\u6307\u6a19<\/th>\n      <th>\u51fa\u5178\/\u30b3\u30de\u30f3\u30c9<\/th>\n      <th>\u610f\u5473<\/th>\n      <th>\u5178\u578b\u7684\u306a\u4fe1\u53f7<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u30ad\u30e3\u30c3\u30b7\u30e5<\/td>\n      <td>free -m, \/proc\/meminfo<\/td>\n      <td>\u30d5\u30a1\u30a4\u30eb\u30c7\u30fc\u30bf\u7528\u306eRAM\u5272\u5408<\/td>\n      <td>\u983b\u7e41\u306a\u30d5\u30a1\u30a4\u30eb\u30a2\u30af\u30bb\u30b9\u3067\u9ad8\u3044\u4fa1\u5024<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30c0\u30fc\u30c6\u30a3<\/td>\n      <td>\/proc\/meminfo<\/td>\n      <td>\u307e\u3060\u66f8\u304d\u623b\u3055\u308c\u3066\u3044\u306a\u3044\u30da\u30fc\u30b8<\/td>\n      <td>\u96c6\u4e2d\u7684\u306a\u66f8\u304d\u8fbc\u307f\u6642\u306b\u306f\u4e0a\u6607\u3057\u3001\u540c\u671f\u5f8c\u306b\u4e0b\u964d<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30e9\u30a4\u30c8\u30d0\u30c3\u30af<\/td>\n      <td>\/proc\/meminfo<\/td>\n      <td>\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u66f8\u304d\u8fbc\u307f\u64cd\u4f5c<\/td>\n      <td>\u30d5\u30e9\u30c3\u30b7\u30e5\u30d5\u30a7\u30fc\u30ba\u306b\u304a\u3051\u308b\u30bc\u30ed\u4ee5\u5916\u306e\u5024<\/td>\n    <\/tr>\n    <tr>\n      <td>bi\/bo (vmstat)<\/td>\n      <td>vmstat 1<\/td>\n      <td>\u30d6\u30ed\u30c3\u30afI\/O\u5165\u529b\/\u51fa\u529b<\/td>\n      <td>\u30b9\u30d1\u30a4\u30af\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u30df\u30b9\u307e\u305f\u306f\u30d5\u30e9\u30c3\u30b7\u30e5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/td>\n    <\/tr>\n    <tr>\n      <td>r\/s\u3001w\/s (iostat)<\/td>\n      <td>iostat -xz 1<\/td>\n      <td>1\u79d2\u3042\u305f\u308a\u306e\u8aad\u307f\u53d6\u308a\/\u66f8\u304d\u8fbc\u307f\u64cd\u4f5c\u6570<\/td>\n      <td>\u30df\u30b9\u3067\u306e\u30b8\u30e3\u30f3\u30d7\u3001\u4e00\u5b9a\u306e\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u30ce\u30a4\u30ba\u306f\u554f\u984c\u306a\u3057<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/12\/linuxcachemeeting2347.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306e\u65e5\u5e38\u306b\u304a\u3051\u308b\u30e1\u30ea\u30c3\u30c8<\/h2>\n<p>\u5341\u5206\u306b\u6e80\u305f\u3055\u308c\u305f\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u3001I\/O \u5f85\u3061\u6642\u9593\u3092\u5927\u5e45\u306b\u77ed\u7e2e\u3057\u3001\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u3092\u30c7\u30a3\u30b9\u30af\u304b\u3089 RAM \u306b\u79fb\u884c\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u500b\u3005\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u30ec\u30a4\u30c6\u30f3\u30b7\u304c\u5927\u5e45\u306b\u77ed\u7e2e\u3055\u308c\u3001 <strong>\u5fdc\u7b54\u6642\u9593<\/strong> \u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306e\u8868\u793a\u901f\u5ea6\u3092\u5927\u5e45\u306b\u4f4e\u4e0b\u3055\u305b\u307e\u3059\u3002\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u308b\u753b\u50cf\u3001CSS\u3001HTML \u30d5\u30a1\u30a4\u30eb\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\u3055\u308c\u308b\u305f\u3081\u3001\u30a6\u30a7\u30d6\u30b5\u30fc\u30d0\u30fc\u306f SSD \u3092\u7d4c\u7531\u305b\u305a\u306b\u3053\u308c\u3089\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u304c\u591a\u3044\u5834\u5408\u3001\u30d2\u30c3\u30c8\u7387\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u30ea\u30d4\u30fc\u30c8\u30e6\u30fc\u30b6\u30fc\u304c\u591a\u3044\u307b\u3069\u3001\u305d\u306e\u30e1\u30ea\u30c3\u30c8\u306f\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002 \u4e26\u884c\u6027\u306e\u9ad8\u3044\u30b7\u30ca\u30ea\u30aa\u3067\u306f\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u30b9\u30c8\u30ec\u30fc\u30b8\u30ec\u30d9\u30eb\u3092\u8efd\u6e1b\u3057\u3001\u8ca0\u8377\u306e\u30d4\u30fc\u30af\u3092\u5e73\u6e96\u5316\u3057\u307e\u3059\u3002 \u30e1\u30e2\u30ea\u30ad\u30e3\u30c3\u30b7\u30e5\u3001Web \u30ad\u30e3\u30c3\u30b7\u30e5\u3001\u30d7\u30ed\u30ad\u30b7\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u95a2\u9023\u6027\u3092\u3088\u308a\u6df1\u304f\u7406\u89e3\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 <a href=\"https:\/\/webhosting.de\/ja\/%e3%82%ad%e3%83%a3%e3%83%83%e3%82%b7%e3%83%a5-%e9%9a%8e%e5%b1%a4-%e3%82%a6%e3%82%a7%e3%83%96%e3%83%86%e3%82%af%e3%83%8e%e3%83%ad%e3%82%b8%e3%83%bc-%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3\/\">\u30ad\u30e3\u30c3\u30b7\u30e5\u968e\u5c64<\/a>, \u5404\u30ec\u30d9\u30eb\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3057\u3001 <strong>\u30ea\u30bd\u30fc\u30b9<\/strong> \u7121\u99c4\u306b\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n<h2>\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30a4\u30ba\u3092\u30b9\u30de\u30fc\u30c8\u306b\u5236\u5fa1<\/h2>\n<p>\u79c1\u306f\u30012\u3064\u306e\u65b9\u6cd5\u3067\u30ad\u30e3\u30c3\u30b7\u30e5\u52b9\u679c\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u3066\u3044\u307e\u3059\u3002RAM\u3092\u5897\u3084\u3057\u3001\u4e0d\u8981\u306a\u30d5\u30a1\u30a4\u30eb\u30a2\u30af\u30bb\u30b9\u3092\u6e1b\u3089\u3059\u3053\u3068\u3067\u3001\u30db\u30c3\u30c8\u30c7\u30fc\u30bf\u7528\u306e\u30b9\u30da\u30fc\u30b9\u3092\u78ba\u4fdd\u3057\u3001\u30ab\u30fc\u30cd\u30eb\u304c\u9069\u5207\u306a\u30d6\u30ed\u30c3\u30af\u3092 <strong>\u30ad\u30e3\u30c3\u30b7\u30e5<\/strong> Logrotate \u3068 Gzip \u3092\u4f7f\u3063\u3066\u5927\u304d\u306a\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u6574\u7406\u3057\u3001\u30e1\u30e2\u30ea\u5185\u306e\u30d5\u30a1\u30a4\u30eb\u91cf\u3092\u6e1b\u3089\u3057\u3066\u3001\u30ed\u30b0\u304c\u91cd\u8981\u306a\u30a6\u30a7\u30d6\u8cc7\u7523\u3092\u5727\u8feb\u3059\u308b\u306e\u3092\u9632\u304e\u307e\u3059\u3002 \u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3084 SQL \u30c0\u30f3\u30d7\u306a\u3069\u306e\u5927\u898f\u6a21\u306a\u5358\u767a\u8ee2\u9001\u306f\u3001\u53ef\u80fd\u306a\u9650\u308a\u3001\u30aa\u30d5\u30d4\u30fc\u30af\u6642\u306b\u51e6\u7406\u3059\u308b\u3053\u3068\u3067\u3001\u91cd\u8981\u5ea6\u304c\u4f4e\u3044\u3082\u306e\u3068\u3057\u3066\u30de\u30fc\u30af\u3057\u3066\u3044\u307e\u3059\u3002echo 3 &gt; \/proc\/sys\/vm\/drop_caches \u3092\u4f7f\u7528\u3057\u3066\u30ab\u30fc\u30cd\u30eb\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u624b\u52d5\u3067\u30af\u30ea\u30a2\u3059\u308b\u306e\u306f\u3001\u30c6\u30b9\u30c8\u3067\u306e\u307f\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u751f\u7523\u7684\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u30df\u30c3\u30af\u30b9\u3092\u7834\u58ca\u3057\u3001 <strong>\u30ec\u30a4\u30c6\u30f3\u30b7\u30fc<\/strong> \u4e00\u6642\u7684\u306b\u5897\u52a0\u3057\u307e\u3059\u3002\u6700\u7d42\u7684\u306b\u306f\u4f5c\u696d\u91cf\u306b\u3088\u3063\u3066\u6c7a\u307e\u308a\u307e\u3059\u3002RAM \u306b\u53ce\u307e\u308b\u307b\u3069\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f\u5b89\u5b9a\u3057\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\/2025\/12\/linux-page-cache-erklaert-7273.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30c0\u30a4\u30ec\u30af\u30c8 I\/O\u3001fsync\u3001\u304a\u3088\u3073\u6574\u5408\u6027<\/h2>\n<p>\u3059\u3079\u3066\u306e\u30a2\u30af\u30bb\u30b9\u304c\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u7d4c\u7531\u3059\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u4e00\u90e8\u306e\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306f\u3001O_DIRECT \u307e\u305f\u306f O_SYNC \u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304d\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u610f\u56f3\u7684\u306b\u56de\u907f\u3057\u305f\u308a\u3001\u5373\u6642\u306e\u6c38\u7d9a\u6027\u3092\u5f37\u5236\u3057\u305f\u308a\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u4e8c\u91cd\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\uff08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30d0\u30c3\u30d5\u30a1\u30d7\u30fc\u30eb\u3068\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\uff09\u3092\u56de\u907f\u3057\u305f\u3044\u5834\u5408\u3084\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u3088\u308a\u3082\u4e00\u8cab\u6027\u3092\u91cd\u8996\u3059\u308b\u5834\u5408\u306b\u6709\u7528\u3067\u3059\u3002 Web \u304a\u3088\u3073\u30e1\u30c7\u30a3\u30a2\u306e\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306b\u3064\u3044\u3066\u306f\u3001\u30d2\u30c3\u30c8\u7387\u304c\u307b\u3068\u3093\u3069\u306e\u5834\u5408\u306b\u512a\u52e2\u3067\u3042\u308b\u305f\u3081\u3001\u901a\u5e38\u306f\u901a\u5e38\u306e\u30d0\u30c3\u30d5\u30a1\u4ed8\u304d I\/O \u3092\u63a1\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001fsync \u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3059\u3002\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306b\u5bfe\u3057\u3066 fsync \u3092\u983b\u7e41\u306b\u5b9f\u884c\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u30e9\u30a4\u30c8\u30d0\u30c3\u30af\u30b5\u30a4\u30af\u30eb\u3092\u4fc3\u9032\u3057\u3001I\/O \u306e\u30d4\u30fc\u30af\u3092\u767a\u751f\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 \u79c1\u306f\u3001\u53ef\u80fd\u3067\u3042\u308c\u3070\u3001\u305d\u306e\u3088\u3046\u306a\u547c\u3073\u51fa\u3057\u3092\u307e\u3068\u3081\u3066\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d5\u30e9\u30c3\u30b7\u30e5\u9593\u9694\u3092\u9069\u5207\u306b\u8a2d\u5b9a\u3057\u3066\u3001 <strong>\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8<\/strong> \u9ad8\u304f\u63b2\u3052\u308b\u3002.<\/p>\n\n<h2>\u30de\u30a6\u30f3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\uff1arelatime\u3001noatime \u306a\u3069.<\/h2>\n<p>\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u30a2\u30af\u30bb\u30b9\u306f\u3001atime\uff08\u30a2\u30af\u30bb\u30b9\u6642\u9593\uff09\u3092\u66f4\u65b0\u3057\u3001\u8ffd\u52a0\u306e\u66f8\u304d\u8fbc\u307f\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 <strong>relatime<\/strong> \uff08\u4eca\u65e5\u306e\u6a19\u6e96\uff09\u3067\u306f\u3001Atime \u306f\u5fc5\u8981\u306a\u5834\u5408\u306b\u306e\u307f\u8abf\u6574\u3055\u308c\u308b\u305f\u3081\u3001I\/O \u304c\u5927\u5e45\u306b\u524a\u6e1b\u3055\u308c\u307e\u3059\u3002Atime \u30d9\u30fc\u30b9\u306e\u30ed\u30b8\u30c3\u30af\u304c\u4f7f\u7528\u3055\u308c\u3066\u3044\u306a\u3044\u7d14\u7c8b\u306a Web \u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u3067\u306f\u3001\u79c1\u306f\u3088\u304f <strong>\u30ce\u30fc\u30bf\u30a4\u30e0<\/strong>, \u66f8\u304d\u8fbc\u307f\u30a2\u30af\u30bb\u30b9\u3092\u3055\u3089\u306b\u6e1b\u3089\u3059\u305f\u3081\u3002\u307e\u305f\u3001\u30d1\u30bf\u30fc\u30f3\u3068 CPU \u306e\u4f59\u88d5\u304c\u8a31\u305b\u3070\u3001\u9069\u5207\u306a\u30d6\u30ed\u30c3\u30af\u30b5\u30a4\u30ba\u3001\u30d0\u30ea\u30a2\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u30ec\u30d9\u30eb\u3067\u306e\u5727\u7e2e\u3082\u5b9f\u7528\u7684\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30de\u30a6\u30f3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u3001\u4e0d\u8981\u306a\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u66f4\u65b0\u304c\u5c11\u306a\u304f\u306a\u308b\u305f\u3081\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u30d2\u30c3\u30c8\u7387\u306e\u5411\u4e0a\u306b\u76f4\u63a5\u3064\u306a\u304c\u308a\u307e\u3059\u3002 <strong>\u30e1\u30e2\u30ea<\/strong>-\u30d1\u30b9\u306b\u8ca0\u8377\u3092\u304b\u3051\u308b\u3002.<\/p>\n\n<h2>\u30b3\u30f3\u30c6\u30ca\u3068cgroups\uff1a\u30de\u30eb\u30c1\u30c6\u30ca\u30f3\u30c8\u904b\u7528\u306b\u304a\u3051\u308b\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5<\/h2>\n<p>\u30b3\u30f3\u30c6\u30ca\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u3067\u306f\u3001\u8907\u6570\u306e\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u304c\u30b0\u30ed\u30fc\u30d0\u30eb\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u5171\u6709\u3057\u307e\u3059\u3002cgroups \u306b\u3088\u308b\u30e1\u30e2\u30ea\u5236\u9650\u306f\u3001\u30b3\u30f3\u30c6\u30ca\u3054\u3068\u306b\u8a31\u53ef\u3055\u308c\u308b\u533f\u540d\u30e1\u30e2\u30ea\uff08\u30d2\u30fc\u30d7\/\u30b9\u30bf\u30c3\u30af\uff09\u306e\u91cf\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u304c\u3001\u30d5\u30a1\u30a4\u30eb\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u30db\u30b9\u30c8\u30ab\u30fc\u30cd\u30eb\u306b\u3088\u3063\u3066\u7ba1\u7406\u3055\u308c\u307e\u3059\u3002\u30b3\u30f3\u30c6\u30ca\u304c\u904e\u71b1\u3057\u3066\u591a\u304f\u306e\u65b0\u3057\u3044\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u3068\u3001\u4ed6\u306e\u30b3\u30f3\u30c6\u30ca\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u30da\u30fc\u30b8\u304c\u62bc\u3057\u51fa\u3055\u308c\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002 \u305d\u306e\u305f\u3081\u3001\u79c1\u306f\u30e1\u30e2\u30ea\u304a\u3088\u3073 I\/O \u5236\u5fa1\uff08memory.high\u3001memory.max\u3001io.max\uff09\u3092\u4f7f\u7528\u3057\u3066\u3001\u8ca0\u8377\u306e\u30d4\u30fc\u30af\u3092\u5e73\u6e96\u5316\u3057\u3001\u516c\u5e73\u6027\u3092\u9ad8\u3081\u3066\u3044\u307e\u3059\u3002\u30b3\u30f3\u30c6\u30ca\u3067\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u308b OverlayFS \u306f\u3001\u8ffd\u52a0\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u30ec\u30a4\u30e4\u30fc\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30d1\u30b9\u89e3\u6c7a\u3084\u30b3\u30d4\u30fc\u30aa\u30f3\u30e9\u30a4\u30c8\u306e\u66f8\u304d\u8fbc\u307f\u30d1\u30b9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 \u30aa\u30fc\u30d0\u30fc\u30ec\u30a4\u30ec\u30a4\u30e4\u30fc\u306b\u3088\u3063\u3066\u30ec\u30a4\u30c6\u30f3\u30b7\u304c\u9855\u8457\u306b\u5897\u52a0\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u610f\u56f3\u7684\u306b\u6e2c\u5b9a\u3057\u3001\u9759\u7684\u30a2\u30bb\u30c3\u30c8\u306b\u3064\u3044\u3066\u306f\u3001\u8ffd\u52a0\u306e\u30ec\u30a4\u30e4\u30fc\u3092\u4f7f\u7528\u3057\u306a\u3044\u30d0\u30a4\u30f3\u30c9\u30de\u30a6\u30f3\u30c8\u3092\u691c\u8a0e\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<h2>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u4e88\u71b1\u3068\u4fdd\u8b77<\/h2>\n<p>\u518d\u8d77\u52d5\u5f8c\u3084\u5927\u898f\u6a21\u306a\u30c7\u30d7\u30ed\u30a4\u30e1\u30f3\u30c8\u5f8c\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u7a7a\u306b\u306a\u308a\u307e\u3059\u3002\u30db\u30c3\u30c8\u30bb\u30c3\u30c8\u3092\u30bf\u30fc\u30b2\u30c3\u30c8\u306b\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002 <strong>\u4e88\u71b1\u3059\u308b<\/strong>, \u9700\u8981\u306e\u9ad8\u3044\u30a2\u30bb\u30c3\u30c8\u3092\u4e00\u5ea6\u306b\u9806\u6b21\u8aad\u307f\u8fbc\u3080\u3053\u3068\u3067\u3001\u6700\u521d\u306e\u6570\u5206\u9593\u306e\u30b3\u30fc\u30eb\u30c9\u30b9\u30bf\u30fc\u30c8\u306e\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u5927\u5e45\u306b\u524a\u6e1b\u3057\u307e\u3059\u3002 \u305d\u306e\u4e00\u65b9\u3067\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6c5a\u67d3\u306f\u907f\u3051\u3066\u3044\u307e\u3059\u3002\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3001\u30de\u30eb\u30a6\u30a7\u30a2\u30b9\u30ad\u30e3\u30f3\u3001\u307e\u305f\u306f\u5927\u898f\u6a21\u306a\u9806\u6b21\u30b3\u30d4\u30fc\u306e\u5b9f\u884c\u30c4\u30fc\u30eb\u306f\u3001\u512a\u5148\u5ea6\u3092\u4f4e\u304f\uff08nice\/ionice\uff09\u8a2d\u5b9a\u3057\u3066\u8aad\u307f\u8fbc\u307f\u3001\u53ef\u80fd\u3067\u3042\u308c\u3070 Fadvise \u3092\u4f7f\u7528\u3057\u3066\u91cd\u8981\u5ea6\u304c\u4f4e\u3044\uff08DONTNEED\uff09\u3068\u30de\u30fc\u30af\u3057\u3066\u3001\u5b9f\u884c\u5f8c\u306b\u30da\u30fc\u30b8\u304c\u6d88\u3048\u308b\u3088\u3046\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306f Web \u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306b\u7126\u70b9\u3092\u5f53\u3066\u3001\u672c\u5f53\u306b\u30db\u30c3\u30c8\u306a <strong>\u30c7\u30fc\u30bf<\/strong>.<\/p>\n\n<h2>NUMA \u3068\u5927\u898f\u6a21\u30db\u30b9\u30c8<\/h2>\n<p>NUMA \u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u30e1\u30e2\u30ea\u306e\u5c40\u6240\u6027\u304c\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u7269\u7406\u7684\u306b\u30ce\u30fc\u30c9\u5185\u306b\u3042\u308a\u3001\u30ea\u30e2\u30fc\u30c8\u30a2\u30af\u30bb\u30b9\u306f\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u5897\u52a0\u3055\u305b\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u30a2\u30af\u30bb\u30b9\u304c\u983b\u7e41\u306a\u30b5\u30fc\u30d3\u30b9\u306b\u3064\u3044\u3066\u306f\u3001CPU \u3068\u30e1\u30e2\u30ea\u306e\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u306e\u4e00\u8cab\u6027\u306b\u6ce8\u610f\u3057\u3001zone_reclaim_mode \u304c\u9069\u5207\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002 \u5b9f\u969b\u306b\u306f\u3001NUMA \u30ce\u30fc\u30c9\u3054\u3068\u306b\u4e2d\u592e\u306e Web \u304a\u3088\u3073 PHP \u30d7\u30ed\u30bb\u30b9\u3092\u30d0\u30f3\u30c9\u30eb\u3057\u3066\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6700\u3082\u4f7f\u7528\u983b\u5ea6\u306e\u9ad8\u3044\u90e8\u5206\u304c\u30ed\u30fc\u30ab\u30eb\u306b\u7559\u307e\u308b\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u304c\u3001\u591a\u304f\u306e\u5834\u5408\u6709\u52b9\u3067\u3059\u3002\u540c\u6642\u306b\u3001\u5927\u898f\u6a21\u306a Java \u307e\u305f\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30d7\u30ed\u30bb\u30b9\u304c\u3001\u72ec\u81ea\u306e\u30e1\u30e2\u30ea\u8981\u4ef6\u306b\u3088\u3063\u3066\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u5727\u8feb\u3057\u3066\u3044\u306a\u3044\u304b\u3092\u76e3\u8996\u3057\u3001\u305d\u306e\u5834\u5408\u306f RAM \u3092\u62e1\u5f35\u3059\u308b\u304b\u3001\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u3092\u5206\u96e2\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\/2025\/12\/linux_cache_office_4832.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>NFS \u3068\u5171\u6709\u30e1\u30e2\u30ea<\/h2>\n<p>NFS \u3084\u985e\u4f3c\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u4f7f\u7528\u3057\u305f\u30af\u30e9\u30b9\u30bf\u8a2d\u5b9a\u3067\u306f\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6271\u3044\u304c\u3088\u308a\u8907\u96d1\u306b\u306a\u308a\u307e\u3059\u3002\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u6d88\u8cbb\u30db\u30b9\u30c8\u4e0a\u3067\u30ed\u30fc\u30ab\u30eb\u306b\u4f5c\u7528\u3057\u307e\u3059\u304c\u3001\u5225\u306e\u30ce\u30fc\u30c9\u3067\u306e\u5909\u66f4\u306f\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u4ecb\u3057\u3066\u7121\u52b9\u5316\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u79c1\u306f\u3001I\/O \u3092\u904e\u5ea6\u306b\u767a\u751f\u3055\u305b\u308b\u3053\u3068\u306a\u304f\u4e00\u8cab\u6027\u3092\u7dad\u6301\u3067\u304d\u308b\u3088\u3046\u3001\u5c5e\u6027\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u7121\u52b9\u5316\u9593\u9694\u3092\u8abf\u6574\u3057\u3066\u3044\u307e\u3059\u3002 \u5171\u6709\u30b9\u30c8\u30ec\u30fc\u30b8\u4e0a\u306e\u9759\u7684\u306a Web \u8cc7\u7523\u306b\u3064\u3044\u3066\u306f\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u4e0d\u8981\u306b\u30af\u30ea\u30a2\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u3001\u518d\u691c\u8a3c\u3092\u5236\u9650\u3057\u3001\u30c7\u30d7\u30ed\u30a4\u30e1\u30f3\u30c8\u3092\u30a2\u30c8\u30df\u30c3\u30af\uff08\u4f8b\uff1a\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u4ea4\u63db\uff09\u306b\u3059\u308b\u306e\u304c\u6709\u52b9\u3067\u3059\u3002\u53ef\u80fd\u3067\u3042\u308c\u3070\u3001\u30db\u30c3\u30c8\u30bb\u30c3\u30c8\u3092\u500b\u3005\u306e Web \u30ce\u30fc\u30c9\u306b\u8907\u88fd\u3057\u3066\u3001\u6700\u5927\u9650\u306e <strong>\u30d2\u30c3\u30c8\u7387<\/strong> \u306b\u5230\u9054\u3059\u308b\u3002.<\/p>\n\n<h2>Tmpfs \u3068\u4e00\u6642\u30c7\u30fc\u30bf<\/h2>\n<p>\u30bb\u30c3\u30b7\u30e7\u30f3\u30d5\u30a1\u30a4\u30eb\u3001\u30d3\u30eb\u30c9\u6210\u679c\u7269\u3001\u77ed\u3044\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u30ad\u30e5\u30fc\u306a\u3069\u3001\u4e00\u6642\u7684\u306b\u983b\u7e41\u306b\u8aad\u307f\u8fbc\u307e\u308c\u308b\u30c7\u30fc\u30bf\u306b\u306f\u3001\u79c1\u306f <strong>tmpfs<\/strong> \u3053\u308c\u306b\u3088\u308a\u3001\u30c7\u30d0\u30a4\u30b9\u30a2\u30af\u30bb\u30b9\u3092\u5b8c\u5168\u306b\u7bc0\u7d04\u3057\u3001\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u4e8b\u5b9f\u4e0a\u30d7\u30e9\u30a4\u30de\u30ea\u30b9\u30c8\u30ec\u30fc\u30b8\u30ec\u30d9\u30eb\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001tmpfs \u306e\u30b5\u30a4\u30ba\u8a2d\u5b9a\u306f\u614e\u91cd\u306b\u884c\u3044\u307e\u3059\u3002tmpfs \u306f RAM\uff08\u304a\u3088\u3073\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u30b9\u30ef\u30c3\u30d7\uff09\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u3001tmpfs \u30de\u30a6\u30f3\u30c8\u304c\u5927\u304d\u3059\u304e\u308b\u3068\u4ed6\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30b9\u30da\u30fc\u30b9\u3092\u596a\u3063\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308b\u304b\u3089\u3067\u3059\u3002 \u5b9a\u671f\u7684\u306a\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u30d7\u30ed\u30bb\u30b9\uff08systemd-tmpfiles \u306a\u3069\uff09\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u304c\u84c4\u7a4d\u3055\u308c\u3066\u30e1\u30e2\u30ea\u304c\u4e0d\u8db3\u3059\u308b\u306e\u3092\u9632\u304e\u307e\u3059\u3002.<\/p>\n\n<h2>\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u30d1\u30bf\u30fc\u30f3\uff1a\u5c0f\u898f\u6a21\u5bfe\u5927\u898f\u6a21\u3001\u9806\u6b21\u5bfe\u30e9\u30f3\u30c0\u30e0<\/h2>\n<p>\u7406\u60f3\u7684\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6319\u52d5\u306f\u3001\u30d1\u30bf\u30fc\u30f3\u306b\u5927\u304d\u304f\u4f9d\u5b58\u3057\u307e\u3059\u3002\u983b\u7e41\u306b\u7e70\u308a\u8fd4\u3055\u308c\u308b\u5c0f\u3055\u306a\u30d5\u30a1\u30a4\u30eb\u306f\u3001LRU \u3068\u9ad8\u3044\u5272\u5408\u306b\u3088\u3063\u3066\u6700\u5927\u306e\u30e1\u30ea\u30c3\u30c8\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <strong>Active(\u30d5\u30a1\u30a4\u30eb)<\/strong>. \u4e00\u65b9\u3001\u4e00\u5ea6\u3060\u3051\u8aad\u307f\u8fbc\u307e\u308c\u308b\u5927\u304d\u306a\u30d5\u30a1\u30a4\u30eb\uff08\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3001\u30e1\u30c7\u30a3\u30a2\u30c8\u30e9\u30f3\u30b9\u30b3\u30fc\u30c9\uff09\u306f\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u652f\u914d\u3059\u3079\u304d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002 \u79c1\u306f\u3001\u30e9\u30f3\u30c0\u30e0\u30a2\u30af\u30bb\u30b9\u3092\u80a5\u5927\u5316\u3055\u305b\u308b\u3053\u3068\u306a\u304f\u3001\u9806\u6b21\u30ea\u30fc\u30c0\u30fc\u306e\u901f\u5ea6\u3092\u4e0a\u3052\u308b\u305f\u3081\u306b\u3001read_ahead_kb \u3092\u9069\u5ea6\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u9759\u7684\u30d5\u30a1\u30a4\u30eb\u304c\u591a\u3044 Web \u30b5\u30fc\u30d0\u30fc\u3067\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u30b9\u30da\u30fc\u30b9\u3067\u306e\u30b3\u30d4\u30fc\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306b\u3001\u30bc\u30ed\u30b3\u30d4\u30fc\u30d1\u30b9 (sendfile\u3001splice) \u3092\u6709\u52b9\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u30bd\u30b1\u30c3\u30c8\u306b\u76f4\u63a5\u30c7\u30fc\u30bf\u3092\u63d0\u4f9b\u3059\u308b\u305f\u3081\u3001CPU \u3092\u7bc0\u7d04\u3057\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u5e73\u6e96\u5316\u3059\u308b\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\/2025\/12\/linux_pagecache_schreibtisch4872.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u8a73\u7d30\u306a\u89b3\u5bdf\u3068\u75c7\u72b6<\/h2>\n<p>vmstat \u3084 iostat \u306b\u52a0\u3048\u3066\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3001\u30ea\u30af\u30ec\u30a4\u30e0\u7d71\u8a08\uff08\u4f8b\uff1aActive\/Inactive\u3001pgscan\/pgsteal\u3001\/proc\/meminfo \u7d4c\u7531\uff09\u3092\u78ba\u8a8d\u3057\u3066\u3001\u30b7\u30b9\u30c6\u30e0\u304c\u30da\u30fc\u30b8\u3092\u7a4d\u6975\u7684\u306b\u30ea\u30af\u30ec\u30a4\u30e0\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002 \u983b\u7e41\u306a\u30e1\u30b8\u30e3\u30fc\u30da\u30fc\u30b8\u30d5\u30a9\u30fc\u30eb\u30c8\u3001IO \u5f85\u6a5f\u5024\u306e\u4e0a\u6607\u3001\u304a\u3088\u3073\u6301\u7d9a\u7684\u306a\u9ad8\u3044\u30e9\u30a4\u30c8\u30d0\u30c3\u30af\u6642\u9593\u306f\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u8ca0\u8377\u304c\u304b\u304b\u3063\u3066\u3044\u308b\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u72b6\u6cc1\u3067\u306f\u3001\u307e\u305a\u4f5c\u696d\u91cf\u3092\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u304b\u3001RAM \u3092\u5897\u3084\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002 \u30df\u30b9\u304c\u5f15\u304d\u7d9a\u304d\u591a\u3044\u5834\u5408\u306f\u3001LRU \u30e1\u30ab\u30cb\u30ba\u30e0\u304c\u9069\u5207\u306a\u30d6\u30ed\u30c3\u30af\u3092\u512a\u5148\u3059\u308b\u3088\u3046\u306b\u3001\u30c7\u30fc\u30bf\u3092\u30bb\u30b0\u30e1\u30f3\u30c8\u5316\u3057\u307e\u3059\uff08\u305f\u3068\u3048\u3070\u3001\u4f7f\u7528\u983b\u5ea6\u306e\u4f4e\u3044\u30a2\u30fc\u30ab\u30a4\u30d6\u3068\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u308b Web \u8cc7\u7523\u3092\u5206\u96e2\u3059\u308b\u306a\u3069\uff09\u3002.<\/p>\n\n<h2>\u5b9f\u8df5\u7684\u306a\u7d4c\u9a13\u5247<\/h2>\n<ul>\n  <li>\u3092\u8a08\u753b\u3057\u3066\u3044\u308b\u3002 <strong>RAM<\/strong> \u30db\u30c3\u30c8\u30bb\u30c3\u30c8\uff08\u9759\u7684\u306a\u30a6\u30a7\u30d6\u30a2\u30bb\u30c3\u30c8 + \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u90e8\u5206\uff09\u304c 1\uff5e2 \u56de\u53ce\u307e\u308b\u3088\u3046\u306b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u30d4\u30fc\u30af\u6642\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u30d2\u30c3\u30c8\u306e\u53ef\u80fd\u6027\u304c 2 \u500d\u306b\u306a\u308a\u307e\u3059\u3002.<\/li>\n  <li>\u30b9\u30ef\u30c3\u30d4\u30f3\u30b0\u306f\u5fb9\u5e95\u7684\u306b\u907f\u3051\u3066\u3044\u307e\u3059\u3002\u533f\u540d\u30da\u30fc\u30b8\u304c\u30a2\u30a6\u30c8\u30bd\u30fc\u30b9\u3055\u308c\u308b\u3068\u3001\u30da\u30fc\u30b8\u30e3\u30fc\u304c\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u3068I\/O\u3092\u4e89\u3044\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u304c\u4f4e\u4e0b\u3057\u3066\u3057\u307e\u3046\u304b\u3089\u3067\u3059\u3002\u30b9\u30ef\u30c3\u30d7\u6027\u306f\u9069\u5ea6\u306b\u6291\u3048\u3066\u3044\u307e\u3059\u3002.<\/li>\n  <li>\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306f\u3088\u308a\u77ed\u304f\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3057\u3001\u53e4\u3044\u4e16\u4ee3\u306f\u5727\u7e2e\u3057\u3066\u3001\u30c1\u30e3\u30c3\u30c8\u30ed\u30b0\u304c\u30a6\u30a7\u30d6\u30a2\u30bb\u30c3\u30c8\u3068\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30b9\u30da\u30fc\u30b9\u3092\u4e89\u308f\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002.<\/li>\n  <li>\u591a\u304f\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u5909\u66f4\u3059\u308b\u30c7\u30d7\u30ed\u30a4\u30e1\u30f3\u30c8\u3092\u3001\u5c11\u6570\u306e\u30a2\u30c8\u30df\u30c3\u30af\u306a\u30b9\u30c6\u30c3\u30d7\u306b\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u4e00\u5ea6\u306b\u7121\u52b9\u5316\u3059\u308b\u30ad\u30e3\u30c3\u30b7\u30e5\u30a8\u30f3\u30c8\u30ea\u304c\u5c11\u306a\u304f\u306a\u308a\u3001 <strong>\u30d2\u30c3\u30c8\u7387<\/strong> \u9ad8\u3044\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\/2025\/12\/linux-pagecache-server-7192.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3068\u30ad\u30e3\u30c3\u30b7\u30e5\u30a2\u30af\u30bb\u30b9<\/h2>\n<p>\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306f\u3001\u30ab\u30fc\u30cd\u30eb\u304c\u30c7\u30fc\u30bf\u3092\u4fdd\u6301\u304a\u3088\u3073\u66f8\u304d\u623b\u3059\u52b9\u7387\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u305f\u3081\u3001Ext4\u3001XFS\u3001ZFS \u306e\u7279\u6027\u3092\u7406\u89e3\u3057\u3001\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306b\u5408\u308f\u305b\u3066\u9078\u629e\u3059\u308b\u3053\u3068\u3067\u3001 <strong>\u30ad\u30e3\u30c3\u30b7\u30e5<\/strong> \u6700\u9069\u306a\u52b9\u679c\u3092\u767a\u63ee\u3057\u307e\u3059\u3002Ext4 \u306f\u5805\u5b9f\u306a\u30aa\u30fc\u30eb\u30e9\u30a6\u30f3\u30c9\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u767a\u63ee\u3057\u3001XFS \u306f\u4e26\u5217\u66f8\u304d\u8fbc\u307f\u8ca0\u8377\u3067\u512a\u308c\u305f\u6027\u80fd\u3092\u767a\u63ee\u3057\u3001ZFS \u306f ARC \u306a\u3069\u306e\u72ec\u81ea\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u30ec\u30d9\u30eb\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002\u30d1\u30bf\u30fc\u30f3\uff08\u591a\u6570\u306e\u5c0f\u3055\u306a\u30d5\u30a1\u30a4\u30eb\u5bfe\u5927\u304d\u306a\u30e1\u30c7\u30a3\u30a2\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\u306b\u5fdc\u3058\u3066\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u3068\u66f8\u304d\u8fbc\u307f\u30d1\u30b9\u306f\u7570\u306a\u308b\u52d5\u4f5c\u3092\u3057\u307e\u3059\u3002\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3092\u6c7a\u5b9a\u3059\u308b\u524d\u306b\u3001\u5b9f\u969b\u306e\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u3092\u6e2c\u5b9a\u3057\u307e\u3059\u3002\u6982\u8981\u3092\u30b3\u30f3\u30d1\u30af\u30c8\u306b\u628a\u63e1\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 <a href=\"https:\/\/webhosting.de\/ja\/ext4-xfs-zfs-%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0%e3%83%91%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%b3%e3%82%b9%e6%af%94%e8%bc%83-%e3%82%b9%e3%83%88%e3%83%ac%e3%83%bc%e3%82%b8\/\">Ext4\u3001XFS\u3001ZFS \u306e\u6bd4\u8f03<\/a> \u30de\u30a6\u30f3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u306a\u3069\u306e\u8a2d\u5b9a\u3092\u8abf\u6574\u3057\u3066\u3001\u30ab\u30fc\u30cd\u30eb\u304c\u4e0d\u8981\u306a <strong>\u30df\u30b9<\/strong> \u751f\u7523\u3002.<\/p>\n\n<h2>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3001Opcache\u3001\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5<\/h2>\n<p>MySQL \u304a\u3088\u3073 MariaDB \u3067\u306f\u3001InnoDB \u30d0\u30c3\u30d5\u30a1\u30d7\u30fc\u30eb\u304c\u30c7\u30fc\u30bf\u30da\u30fc\u30b8\u3068\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u5927\u90e8\u5206\u3092\u51e6\u7406\u3057\u3001\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u30d6\u30ed\u30c3\u30af\u306e\u51e6\u7406\u3092\u3055\u3089\u306b\u9ad8\u901f\u5316\u3059\u308b\u3053\u3068\u3067\u3001\u5168\u4f53\u7684\u306a I\/O \u3092\u524a\u6e1b\u3057\u307e\u3059\u3002 <strong>\u30af\u30a8\u30ea<\/strong>-\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u524a\u6e1b\u3057\u307e\u3059\u3002\u30db\u30c3\u30c8\u30bb\u30c3\u30c8\u304c\u53ce\u307e\u308b\u3088\u3046\u306b\u30d0\u30c3\u30d5\u30a1\u30d7\u30fc\u30eb\u3092\u5341\u5206\u306b\u5927\u304d\u304f\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u305d\u3046\u3057\u306a\u3044\u3068\u3001\u30a8\u30f3\u30b8\u30f3\u304c\u4e0d\u8981\u306a\u30c7\u30a3\u30b9\u30af\u30a2\u30af\u30bb\u30b9\u3092\u884c\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002 PHP \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30d0\u30a4\u30c8\u30b3\u30fc\u30c9\u7528\u306b Opcache\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u95a2\u9023\u30c7\u30fc\u30bf\u7528\u306b APCu \u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u3078\u306e\u8ca0\u8377\u3092\u8efd\u6e1b\u3057\u3066\u3044\u307e\u3059\u3002\u9759\u7684\u30a2\u30bb\u30c3\u30c8\u306f\u5f15\u304d\u7d9a\u304d\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5bfe\u8c61\u3068\u306a\u308a\u3001\u77ac\u6642\u306b\u8aad\u307f\u8fbc\u307e\u308c\u307e\u3059\u3002\u3053\u306e\u968e\u5c64\u5316\u306b\u3088\u308a\u3001\u4f5c\u696d\u306e\u91cd\u8907\u304c\u56de\u907f\u3055\u308c\u3001 <strong>CPU<\/strong> \u52d5\u7684\u306a\u90e8\u5206\u306e\u305f\u3081\u306b\u81ea\u7531\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\/2025\/12\/linux_cache_office_4832.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u3068\u8a3a\u65ad<\/h2>\n<p>vmstat 1 \u3067\u30e1\u30e2\u30ea\u3068 I\/O \u306e\u5146\u5019\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u76e3\u8996\u3057\u3001iostat -xz 1 \u3067\u30c7\u30d0\u30a4\u30b9\u3054\u3068\u306b\u78ba\u8a8d\u3057\u3001\/proc\/meminfo \u3067 Dirty\u3001Cached\u3001Writeback \u3092\u78ba\u8a8d\u3057\u3066\u3001\u539f\u56e0\u3092\u7d20\u65e9\u304f\u7d5e\u308a\u8fbc\u307f\u3001\u7684\u3092\u7d5e\u3063\u3066\u5bfe\u51e6\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u884c\u70ba<\/strong> \u3067\u304d\u307e\u3059\u3002IO \u5f85\u6a5f\u5024\u304c\u5e38\u306b\u9ad8\u3044\u5834\u5408\u306f\u3001\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u304c\u5b58\u5728\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u3001\u307e\u305a\u30ad\u30e3\u30c3\u30b7\u30e5\u3068 RAM \u3067\u305d\u306e\u5f71\u97ff\u3092\u8efd\u6e1b\u3057\u307e\u3059\u3002\u6b21\u306b\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3001RAID\u3001\u307e\u305f\u306f SSD \u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u304c\u901f\u5ea6\u4f4e\u4e0b\u306e\u539f\u56e0\u3068\u306a\u3063\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u8abf\u3079\u307e\u3059\u3002IO \u5f85\u6a5f\u304c\u4f9d\u7136\u3068\u3057\u3066\u6df1\u523b\u306a\u5834\u5408\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30a2\u30af\u30bb\u30b9\u3068\u30ad\u30e3\u30c3\u30b7\u30e5\u30d2\u30c3\u30c8\u7387\u3092\u5206\u6790\u3057\u307e\u3059\u3002\u8a3a\u65ad\u624b\u9806\u306e\u5165\u9580\u3068\u3057\u3066\u3001 <a href=\"https:\/\/webhosting.de\/ja\/io-wait-%e3%82%92%e7%90%86%e8%a7%a3%e3%81%99%e3%82%8b-%e3%83%a1%e3%83%a2%e3%83%aa%e3%83%9c%e3%83%88%e3%83%ab%e3%83%8d%e3%83%83%e3%82%af%e3%81%ae%e8%a7%a3%e6%b6%88-%e6%9c%80%e9%81%a9%e5%8c%96\/\">IO\u5f85\u6a5f\u3092\u7406\u89e3\u3059\u308b<\/a>, \u75c7\u72b6\u3068\u539f\u56e0\u3092\u533a\u5225\u3057\u3001\u7684\u3092\u7d5e\u3063\u305f\u6cbb\u7642\u3092\u884c\u3046\u305f\u3081\u306b <strong>\u30b9\u30c6\u30c3\u30d7<\/strong> \u5c0e\u304d\u51fa\u3059\u3002.<\/p>\n\n<h2>\u30ea\u30b9\u30af\u306e\u306a\u3044\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u30d1\u30e9\u30e1\u30fc\u30bf<\/h2>\n<p>\u79c1\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u30ab\u30fc\u30cd\u30eb\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u307f\u3092\u8abf\u6574\u3057\u3001\u5909\u66f4\u3092\u614e\u91cd\u306b\u30c6\u30b9\u30c8\u3057\u3066\u3044\u307e\u3059\u3002\u306a\u305c\u306a\u3089\u3001\u512a\u308c\u305f\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u304c\u5b58\u5728\u3057\u3001\u591a\u304f\u306e\u5834\u5408\u3001\u308f\u305a\u304b\u306a\u4fee\u6b63\u3067\u5341\u5206\u306a\u7d50\u679c\u304c\u5f97\u3089\u308c\u308b\u304b\u3089\u3067\u3059\u3002 <strong>\u52b9\u7387\u6027<\/strong> \u3092\u7372\u5f97\u3057\u307e\u3059\u3002vm.dirty_background_bytes \u306f\u3001\u30b7\u30b9\u30c6\u30e0\u304c\u975e\u540c\u671f\u66f8\u304d\u8fbc\u307f\u3092\u958b\u59cb\u3059\u308b\u3057\u304d\u3044\u5024\u3092\u6c7a\u5b9a\u3057\u3001vm.dirty_bytes \u306f\u30c0\u30fc\u30c6\u30a3\u30da\u30fc\u30b8\u306e\u4e0a\u9650\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002 \u3053\u308c\u3089\u306e\u5024\u3092\u30d1\u30fc\u30bb\u30f3\u30c6\u30fc\u30b8\u3067\u306f\u306a\u304f\u30d0\u30a4\u30c8\u5358\u4f4d\u3067\u8a2d\u5b9a\u3059\u308b\u3068\u3001RAM \u306e\u62e1\u5f35\u306b\u95a2\u4fc2\u306a\u304f\u5b89\u5b9a\u3057\u305f\u57fa\u76e4\u304c\u5f97\u3089\u308c\u307e\u3059\u3002\u3055\u3089\u306b\u3001read_ahead_kb 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