{"id":19425,"date":"2026-05-17T08:36:29","date_gmt":"2026-05-17T06:36:29","guid":{"rendered":"https:\/\/webhosting.de\/server-tcp-window-scaling-durchsatzoptimierung-netzwerktuning\/"},"modified":"2026-05-17T08:36:29","modified_gmt":"2026-05-17T06:36:29","slug":"%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc-tcp-%e3%82%a6%e3%82%a4%e3%83%b3%e3%83%89%e3%82%a6%e3%83%bb%e3%82%b9%e3%82%b1%e3%83%bc%e3%83%aa%e3%83%b3%e3%82%b0-%e3%82%b9%e3%83%ab%e3%83%bc%e3%83%97%e3%83%83","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/server-tcp-window-scaling-durchsatzoptimierung-netzwerktuning\/","title":{"rendered":"\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u306b\u304a\u3051\u308b\u30b5\u30fc\u30d0\u30fcTCP\u30a6\u30a3\u30f3\u30c9\u30a6\u306e\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3068\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u306e\u6700\u9069\u5316"},"content":{"rendered":"<p><strong>\u30b5\u30fc\u30d0\u30fcTCP<\/strong> \u30a6\u30a3\u30f3\u30c9\u30a6\u30fb\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u306f\u3001\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u306b\u304a\u3051\u308b\u63a5\u7d9a\u3054\u3068\u306e\u4f7f\u7528\u53ef\u80fd\u306a\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3092\u6c7a\u5b9a\u3059\u308b\u3002\u53d7\u4fe1\u30a6\u30a3\u30f3\u30c9\u30a6\u3092\u8a08\u7b97\u3057\u3001\u52d5\u7684\u306b\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3057\u3001\u30bf\u30fc\u30b2\u30c3\u30c8\u30fb\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u9593\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3092\u6700\u5c0f\u5316\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002 <strong>\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba<\/strong> \u305d\u3057\u3066\u30ec\u30a4\u30c6\u30f3\u30b7\u30fc\u3002.<\/p>\n\n<h2>\u4e2d\u5fc3\u70b9<\/h2>\n\n<p>\u672c\u7a3f\u3067\u306f\u3001\u6700\u3082\u91cd\u8981\u306a\u8a18\u8ff0\u3092\u3042\u3089\u304b\u3058\u3081\u8981\u7d04\u3057\u3066\u304a\u304f\u3002\u30a6\u30a3\u30f3\u30c9\u30a6\u30fb\u30b5\u30a4\u30ba\u3001RTT\u3001\u5e2f\u57df\u5e45-\u9045\u5ef6\u7a4d\u3001\u304a\u3088\u3073\u8ce2\u660e\u306a\u30b7\u30b9\u30c6\u30e0\u30fb\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306b\u96c6\u4e2d\u3059\u308b\u3002\u305d\u308c\u305e\u308c\u306e\u8a18\u8ff0\u306f\u3001\u518d\u73fe\u53ef\u80fd\u306a\u30c7\u30fc\u30bf\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3068\u3044\u3046\u70b9\u3067\u3001\u76f4\u63a5\u7684\u306a\u5229\u76ca\u3092\u3082\u305f\u3089\u3059\u3002\u53c2\u8003\u306e\u306a\u3044\u7406\u8ad6\u306f\u907f\u3051\u3001\u9069\u7528\u53ef\u80fd\u306a\u30b9\u30c6\u30c3\u30d7\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u8a3a\u65ad\u304b\u3089 <strong>\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0<\/strong>.<\/p>\n<ul>\n  <li><strong>\u30a6\u30a3\u30f3\u30c9\u30a6\u306e\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0<\/strong> \u306f64KB\u306e\u5236\u9650\u3092\u89e3\u9664\u3057\u3001\u5927\u304d\u306a\u30a6\u30a3\u30f3\u30c9\u30a6\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u3002.<\/li>\n  <li><strong>\u901a\u4fe1\u4e8b\u696d\u8005<\/strong> \u3068\u30a6\u30a3\u30f3\u30c9\u30a6\u30fb\u30b5\u30a4\u30ba\u304c\u6700\u5927\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\uff08\u2252\u30a6\u30a3\u30f3\u30c9\u30a6\/RTT\uff09\u3092\u6c7a\u5b9a\u3059\u308b\u3002.<\/li>\n  <li><strong>BDP<\/strong> \u306f\u3001\u30ea\u30f3\u30af\u3092\u30d5\u30eb\u306b\u5229\u7528\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba\u3092\u793a\u3057\u3066\u3044\u308b\u3002.<\/li>\n  <li><strong>\u30d0\u30c3\u30d5\u30a1<\/strong> \u307e\u305f\u3001OS\u30b9\u30bf\u30c3\u30af\u306e\u81ea\u52d5\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306b\u3088\u308a\u3001\u5b9f\u969b\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5411\u4e0a\u3059\u308b\u3002.<\/li>\n  <li><strong>\u30de\u30eb\u30c1\u30b9\u30c8\u30ea\u30fc\u30e0<\/strong> \u3068\u30d7\u30ed\u30c8\u30b3\u30eb\u30fb\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u304c\u30c7\u30fc\u30bf\u8ee2\u9001\u3092\u5897\u52a0\u3055\u305b\u308b\u3002.<\/li>\n<\/ul>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/05\/rechenzentrum-tcp-9204.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba\u3068RTT\u304c\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3092\u5de6\u53f3\u3059\u308b\u7406\u7531<\/h2>\n\n<p>\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u2252\u63a5\u7d9a\u3042\u305f\u308a\u306e\u4e0a\u9650\u5024\u3068\u3044\u3046\u5358\u7d14\u306a\u5f0f\u3067\u8a08\u7b97\u3059\u308b\u3002 <strong>\u7a93<\/strong>\/RTT\u300264KB\u306e\u30a6\u30a3\u30f3\u30c9\u30a6\u306850ms\u306eRTT\u3067\u306f\u3001\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u30b1\u30fc\u30d6\u30eb\u30671G\u30d3\u30c3\u30c8\/\u79d2\u304c\u53ef\u80fd\u3067\u3082\u300110M\u30d3\u30c3\u30c8\/\u79d2\u7a0b\u5ea6\u306b\u306a\u308b\u3002\u3053\u306e\u4e0d\u4e00\u81f4\u306f\u9577\u8ddd\u96e2\u3084WAN\u30d1\u30b9\u3067\u7279\u306b\u9855\u8457\u3067\u3059\u3002\u5f85\u3061\u6642\u9593\u304c\u9577\u3051\u308c\u3070\u9577\u3044\u307b\u3069\u3001\u30a6\u30a3\u30f3\u30c9\u30a6\u304c\u5c0f\u3055\u3044\u3068\u8ee2\u9001\u901f\u5ea6\u304c\u9045\u304f\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u672a\u4f7f\u7528\u306e\u307e\u307e\u306e\u5e2f\u57df\u5e45\u3092\u8cfc\u5165\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u5341\u5206\u306b\u5927\u304d\u306a\u53d7\u4fe1\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba\u3092\u512a\u5148\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3057\u3066\u3001\u5b9f\u969b\u306e\u8abf\u6574\u30cd\u30b8\u306f <strong>TCP\u30b9\u30bf\u30c3\u30af<\/strong>.<\/p>\n\n<h2>\u53e4\u5178\u7684\u306aTCP\u30a6\u30a3\u30f3\u30c9\u30a6\u306e\u9650\u754c<\/h2>\n\n<p>\u5143\u306e16\u30d3\u30c3\u30c8\u30fb\u30a6\u30a3\u30f3\u30c9\u30a6\u3067\u306f\u3001\u5024\u304c65,535\u30d0\u30a4\u30c8\u306b\u5236\u9650\u3055\u308c\u308b\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u30cf\u30fc\u30c9\u30fb\u30ea\u30df\u30c3\u30c8\u304c\u8a2d\u5b9a\u3055\u308c\u308b\u3002 <strong>\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8<\/strong> \u304c\u767a\u751f\u3057\u307e\u3059\u3002LAN\u5185\u3067\u306f\u307b\u3068\u3093\u3069\u6c17\u306b\u306a\u308a\u307e\u305b\u3093\u304c\u3001\u5927\u9678\u4e0a\u3067\u306f\u30ec\u30fc\u30c8\u304c\u4e00\u6841\u304b\u3089\u4e8c\u6841\u524d\u534a\u306eM\u30d3\u30c3\u30c8\/\u79d2\u306b\u6fc0\u6e1b\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u300164KB\u3092100ms\u306eRTT\u3067\u8ee2\u9001\u3057\u305f\u5834\u5408\u3001\u7d045M\u30d3\u30c3\u30c8\/\u79d2\u306b\u3057\u304b\u306a\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u3067\u306f\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3084\u30ec\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3001\u5927\u5bb9\u91cf\u30d5\u30a1\u30a4\u30eb\u306e\u8ee2\u9001\u306b\u306f\u4e0d\u5341\u5206\u3067\u3059\u3002\u79c1\u306f\u4e00\u8cab\u3057\u3066\u30a6\u30a3\u30f3\u30c9\u30a6\u30fb\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3053\u306e\u5236\u9650\u3092\u89e3\u6c7a\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u30a2\u30af\u30c6\u30a3\u30d6\u5316<\/strong> \u3068\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/05\/Konferenz_TCP_Optimierung_7823.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>TCP\u30a6\u30a3\u30f3\u30c9\u30a6\u30fb\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u306e\u4ed5\u7d44\u307f<\/h2>\n\n<p>\u30aa\u30d7\u30b7\u30e7\u30f3 <strong>\u30a6\u30a3\u30f3\u30c9\u30a6\u30b9\u30b1\u30fc\u30eb<\/strong> SYN\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u4e2d\u306b\u30cd\u30b4\u30b7\u30a8\u30fc\u30c8\u3055\u308c\u308b\u6307\u6570\uff080\u301c14\uff09\u3092\u4f7f\u3063\u3066\u8ad6\u7406\u30a6\u30a3\u30f3\u30c9\u30a6\u3092\u62e1\u5927\u3059\u308b\u3002\u6709\u52b9\u306a\u30a6\u30a3\u30f3\u30c9\u30a6\u306f\u3001Header-Window \u00d7 2^Scale\u306e\u7d50\u679c\u3067\u3042\u308a\u3001\u305d\u306e\u7d50\u679c\u3001\u6700\u5927\u3067\u30ae\u30ac\u30d0\u30a4\u30c8\u306e\u7bc4\u56f2\u307e\u3067\u5927\u304d\u304f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u4e21\u65b9\u306e\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u304c\u3053\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u53d7\u3051\u5165\u308c\u3001\u4e2d\u9593\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u3053\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3057\u306a\u3044\u3053\u3068\u304c\u91cd\u8981\u3067\u3042\u308b\u3002\u79c1\u306fWireshark\u3067\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001SYN\u3068SYN\/ACK\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306b\u6ce8\u610f\u3092\u6255\u3046\u3002\u3053\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u306a\u3044\u5834\u5408\u3001\u63a5\u7d9a\u306f64KB\u306b\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u3059\u308b\u3002 <strong>\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8<\/strong> \u3059\u3050\u306b\u9650\u5b9a\u3055\u308c\u308b\u3002.<\/p>\n\n<h2>\u73fe\u884c\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u52d5\u7684\u30a6\u30a3\u30f3\u30c9\u30a6\u30fb\u30b5\u30a4\u30ba<\/h2>\n\n<p>\u6700\u8fd1\u306eLinux\u30ab\u30fc\u30cd\u30eb\u3068Windows\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u3053\u306e\u65b9\u5f0f\u3092\u63a1\u7528\u3057\u3066\u3044\u308b\u3002 <strong>RWIN<\/strong> \u30c0\u30a4\u30ca\u30df\u30c3\u30af\u306b\u52d5\u4f5c\u3057\u3001\u597d\u6761\u4ef6\u4e0b\u3067\u306f\u6570\u30e1\u30ac\u30d0\u30a4\u30c8\u306b\u6210\u9577\u3059\u308b\u3002Linux\u3067\u306f <code>net.ipv4.tcp_rmem<\/code>, <code>net.ipv4.tcp_wmem<\/code> \u305d\u3057\u3066 <code>net.ipv4.tcp_window_scaling<\/code>. .Windows\u3067\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002 <code>netsh int tcp show global<\/code>, \u81ea\u52d5\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u304c\u6709\u52b9\u304b\u3069\u3046\u304b\u3002\u6700\u5927\u5024\u3067\u6210\u9577\u304c\u6b62\u307e\u3063\u3066\u3057\u307e\u308f\u306a\u3044\u3088\u3046\u306b\u3001\u4e21\u30b5\u30a4\u30c9\u306b\u5341\u5206\u306a\u30d0\u30c3\u30d5\u30a1\u304c\u3042\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3002\u3053\u3046\u3057\u3066\u3001\u81ea\u52d5\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u306e\u5229\u70b9\u3092\u751f\u304b\u3057\u3066\u3044\u308b\u3002 <strong>\u751f\u7523\u6027\u306e\u9ad8\u3044\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3<\/strong> \u3088\u308a\u3002<\/p>\n\n<h2>BDP\u3092\u6b63\u3057\u304f\u898b\u7a4d\u3082\u308b\u7a93\u306e\u5927\u304d\u3055\u306f\uff1f<\/h2>\n\n<p>\u5e2f\u57df\u5e45\u9045\u5ef6\u7a4d(<strong>BDP<\/strong>\u5e2f\u57df\u5e45\u00d7RTT\uff09\u304cTCP\u30a6\u30a3\u30f3\u30c9\u30a6\u306e\u76ee\u6a19\u5024\u3092\u793a\u3057\u3066\u304f\u308c\u308b\u3002\u79c1\u306f\u3001\u56de\u7dda\u3092\u5229\u7528\u3059\u308b\u305f\u3081\u306b\u3001\u53d7\u4fe1\u30a6\u30a3\u30f3\u30c9\u30a6\u3092\u5c11\u306a\u304f\u3068\u3082\u3053\u306e\u5024\u306b\u8a2d\u5b9a\u3059\u308b\u3002\u5341\u5206\u306a\u30d0\u30c3\u30d5\u30a1\u304c\u306a\u3044\u3068\u3001\u63a5\u7d9a\u306f\u516c\u79f0\u5e2f\u57df\u5e45\u304b\u3089\u5927\u304d\u304f\u9045\u308c\u305f\u307e\u307e\u306b\u306a\u308b\u3002\u6b21\u306e\u8868\u306f\u3001RTT\u3068\u5e2f\u57df\u5e45\u306e\u5178\u578b\u7684\u306a\u7d44\u307f\u5408\u308f\u305b\u3068\u3001\u5fc5\u8981\u306a\u30a6\u30a3\u30f3\u30c9\u30a6\u30fb\u30b5\u30a4\u30ba\u3001\u304a\u3088\u307364KB\u30a6\u30a3\u30f3\u30c9\u30a6\u306e\u5236\u9650\u3092\u793a\u3057\u3066\u3044\u308b\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u3001\u5c0f\u3055\u306a\u30a6\u30a3\u30f3\u30c9\u30a6\u304c\u3069\u306e\u7a0b\u5ea6\u3067\u4f7f\u7528\u3067\u304d\u308b\u304b\u304c\u4e00\u76ee\u3067\u308f\u304b\u308b\u3002 <strong>\u30ef\u30f3<\/strong>-\u30c7\u30a3\u30b9\u30bf\u30f3\u30b9\u30d6\u30ec\u30fc\u30ad\u3002.<\/p>\n\n<table>\n  <thead>\n    <tr>\n      <th>\u901a\u4fe1\u4e8b\u696d\u8005<\/th>\n      <th>\u5e2f\u57df\u5e45<\/th>\n      <th>BDP (MBit)<\/th>\n      <th>\u6700\u5c0f\u30a6\u30a3\u30f3\u30c9\u30a6 (MB)<\/th>\n      <th>64KB\u3067\u306e\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>20\u30df\u30ea\u79d2<\/td>\n      <td>1Gbit\/s<\/td>\n      <td>20<\/td>\n      <td>\u2248 2,5<\/td>\n      <td>\u2248 26 Mbit\/s<\/td>\n    <\/tr>\n    <tr>\n      <td>50\u30df\u30ea\u79d2<\/td>\n      <td>1Gbit\/s<\/td>\n      <td>50<\/td>\n      <td>\u2248 6,25<\/td>\n      <td>\u2248 10 Mbit\/s<\/td>\n    <\/tr>\n    <tr>\n      <td>100\u30df\u30ea\u79d2<\/td>\n      <td>1Gbit\/s<\/td>\n      <td>100<\/td>\n      <td>\u2248 12,5<\/td>\n      <td>\u2248 5 Mbit\/s<\/td>\n    <\/tr>\n    <tr>\n      <td>50\u30df\u30ea\u79d2<\/td>\n      <td>10Gbit\/s<\/td>\n      <td>500<\/td>\n      <td>\u2248 62,5<\/td>\n      <td>\u2248 10 Mbit\/s<\/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\/2026\/05\/tcp-optimization-datacenter-4321.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u5b9f\u8df5\u7684\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\uff1a\u6e2c\u5b9a\u304b\u3089\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u307e\u3067<\/h2>\n\n<p>\u79c1\u306f\u63a1\u5bf8\u304b\u3089\u59cb\u3081\u308b\uff1a <code>\u30d4\u30f3\u30b0<\/code> \u305d\u3057\u3066 <code>\u30c8\u30ec\u30fc\u30b9\u30eb\u30fc\u30c8<\/code> RTT\u3092\u63d0\u4f9b\u3059\u308b\u3001, <code>iperf3<\/code> \u5165\u53e3\u3068\u51fa\u53e3\u306e\u30ec\u30fc\u30c8\u3092\u6e2c\u5b9a\u3057 <code>\u30ef\u30a4\u30e4\u30fc\u30b7\u30e3\u30fc\u30af<\/code> \u4ea4\u6e09\u6210\u7acb <strong>\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0<\/strong> \u3092\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306b\u8ffd\u52a0\u3059\u308b\u3002\u30c8\u30ec\u30fc\u30b9\u306e\u30a6\u30a3\u30f3\u30c9\u30a6\u304c64KB\u306e\u307e\u307e\u306a\u3089\u3001\u30d5\u30a3\u30eb\u30bf\u30fc\u3092\u304b\u3051\u305f\u308a\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u5909\u66f4\u3057\u305f\u308a\u3059\u308b\u30c7\u30d0\u30a4\u30b9\u3092\u63a2\u3059\u3002\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3001VPN\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u3001\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u30fc\u306eRFC1323\u6e96\u62e0\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u304c\u9069\u5207\u3067\u3042\u308c\u3070\u3001OS\u306e\u30d0\u30c3\u30d5\u30a1\u30fc\u306e\u4e0a\u9650\u3068\u81ea\u52d5\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306e\u4e0a\u9650\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002\u307e\u305f\u3001\u8f3b\u8f33\u5236\u5fa1\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u9078\u629e\u3082\u8a55\u4fa1\u3057\u307e\u3059\u3002\u640d\u5931\u3084\u9045\u5ef6\u306b\u5bfe\u3059\u308b\u53cd\u5fdc\u304c\u5b9f\u969b\u306e\u3082\u306e\u3068\u540c\u3058\u3060\u304b\u3089\u3067\u3059\u3002 <strong>\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8<\/strong> \u8a73\u7d30\u306f\u8a18\u4e8b\u306b\u307e\u3068\u3081\u3066\u3042\u308b\u3002 <a href=\"https:\/\/webhosting.de\/ja\/tcp-%e8%bc%bb%e8%bc%b3%e5%88%b6%e5%be%a1%e3%81%ae%e5%bd%b1%e9%9f%bf%e3%81%ae%e6%af%94%e8%bc%83-%e3%83%ac%e3%82%a4%e3%83%86%e3%83%b3%e3%82%b7\/\">TCP\u8f3b\u8f33\u5236\u5fa1<\/a> \u4e00\u7dd2\u306b\u306d\u3002<\/p>\n\n<h2>\u53d7\u4fe1\u30d0\u30c3\u30d5\u30a1\u3068\u9001\u4fe1\u30d0\u30c3\u30d5\u30a1\u3092\u9069\u5207\u306b\u9078\u629e\u3059\u308b<\/h2>\n\n<p>\u79c1\u306f\u30d0\u30c3\u30d5\u30a1\u30fc\u306e\u30b5\u30a4\u30ba\u3092\u6c7a\u3081\u308b\u306e\u306b\u3001\u81ea\u5206\u306e\u4f53\u306e\u5927\u304d\u3055\u3092\u57fa\u6e96\u306b\u3057\u3066\u3044\u308b\u3002 <strong>BDP<\/strong> \u3067\u3001\u6700\u5927\u5024\u3092\u6c17\u524d\u3088\u304f\u3001\u3057\u304b\u3057\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3055\u308c\u305f\u65b9\u6cd5\u3067\u8a2d\u5b9a\u3059\u308b\u3002Linux\u3067\u306f <code>net.ipv4.tcp_rmem<\/code> \u305d\u3057\u3066 <code>net.ipv4.tcp_wmem<\/code> (\u305d\u308c\u305e\u308c\u6700\u5c0f\/\u30c7\u30d5\u30a9\u30eb\u30c8\/\u6700\u5927\uff09\u3001\u9577\u8ddd\u96e2\u7528\u306b\u30de\u30fc\u30b8\u30f3\u3092\u3068\u3063\u3066\u304a\u304f\u3002Windows\u3067\u306f\u3001\u30aa\u30fc\u30c8\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306e\u30ec\u30d9\u30eb\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001TCP\u30b9\u30bf\u30c3\u30af\u306e\u5909\u5316\u3092\u8a18\u9332\u3057\u3066\u3044\u307e\u3059\u3002\u91cd\u8981: \u3088\u308a\u5927\u304d\u306a\u30d0\u30c3\u30d5\u30a1\u306fRAM\u3092\u5fc5\u8981\u3068\u3059\u308b\u306e\u3067\u3001\u79c1\u306f\u9ad8\u8ca0\u8377\u306e\u63a5\u7d9a\u306e\u6570\u3068\u30bf\u30a4\u30d7\u3092\u8a55\u4fa1\u3057\u307e\u3059\u3002\u6b63\u3057\u3044\u30d0\u30c3\u30d5\u30a1\u30fc\u306e\u9078\u629e\u306b\u95a2\u3059\u308b\u80cc\u666f\u3084\u4f8b\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3067\u8a73\u3057\u304f\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002 <a href=\"https:\/\/webhosting.de\/ja\/%e3%82%b5%e3%83%bc%e3%83%90%e3%82%bd%e3%82%b1%e3%83%83%e3%83%88%e3%83%90%e3%83%83%e3%83%95%e3%82%a1-%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0%e3%83%81%e3%83%a5%e3%83%bc%e3%83%8b%e3%83%b3\/\">\u30bd\u30b1\u30c3\u30c8\u30fb\u30d0\u30c3\u30d5\u30a1\u30fb\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0<\/a>, \u3053\u308c\u306f\u3001\u30d0\u30c3\u30d5\u30a1\u3001RWIN\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u306e\u95a2\u4fc2\u3092\u5177\u4f53\u5316\u3059\u308b\u3082\u306e\u3067\u3042\u308b\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\/05\/nacht_tech_optierung_6789.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u4e26\u5217\u5316\uff1a\u8907\u6570\u306eTCP\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u7684\u3092\u7d5e\u3063\u305f\u5229\u7528<\/h2>\n\n<p>\u5927\u304d\u306a\u30a6\u30a4\u30f3\u30c9\u30a6\u304c\u3042\u3063\u3066\u3082\u3001\u3044\u304f\u3064\u304b\u306e\u30a6\u30a4\u30f3\u30c9\u30a6\u3092\u4f7f\u3063\u305f\u65b9\u304c\u3001\u7df4\u7fd2\u306e\u6210\u679c\u304c\u4e0a\u304c\u308b\u3053\u3068\u304c\u591a\u3044\u3002 <strong>\u30b9\u30c8\u30ea\u30fc\u30e0<\/strong> \u3092\u4e26\u884c\u3057\u3066\u5b9f\u884c\u3059\u308b\u3002\u591a\u304f\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30c4\u30fc\u30eb\u3001\u30c0\u30a6\u30f3\u30ed\u30fc\u30c0\u30fc\u3001\u30b7\u30f3\u30af\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u3059\u3067\u306b\u3053\u308c\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u3002\u4e26\u5217\u5316\u306b\u3088\u3063\u3066\u3001\u30df\u30c9\u30eb\u30dc\u30c3\u30af\u30b9\u306e\u63a5\u7d9a\u3054\u3068\u306e\u5236\u9650\u3092\u56de\u907f\u3057\u3001\u500b\u3005\u306e\u30d5\u30ed\u30fc\u306e\u5909\u52d5\u3092\u30b9\u30e0\u30fc\u30ba\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u30d5\u30a1\u30a4\u30eb\u3084\u30d6\u30ed\u30c3\u30af\u306b\u3088\u3063\u3066\u8ee2\u9001\u3092\u30bb\u30b0\u30e1\u30f3\u30c8\u5316\u3057\u3001\u9069\u5207\u306a\u540c\u6642\u5b9f\u884c\u5024\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u30ea\u30b9\u30af\u3092\u5206\u6563\u3057\u3001\u3055\u3089\u306b\u30d1\u30fc\u30bb\u30f3\u30c6\u30fc\u30b8\u3092\u7a3c\u3050\u3053\u3068\u304c\u3067\u304d\u308b\u3002 <strong>\u5e2f\u57df\u5e45<\/strong> \u30a2\u30a6\u30c8\u3002<\/p>\n\n<h2>\u30d7\u30ed\u30c8\u30b3\u30eb\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30fb\u30ec\u30d9\u30eb\u306e\u5fae\u8abf\u6574<\/h2>\n\n<p>\u3059\u3079\u3066\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u304c\u5927\u5bb9\u91cf\u3092\u4f7f\u7528\u3059\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u3002 <strong>\u30a6\u30a3\u30f3\u30c9\u30a6\u30ba<\/strong> \u8ffd\u52a0\u306e\u78ba\u8a8d\u3084\u5c0f\u3055\u306a\u30d6\u30ed\u30c3\u30af\u30b5\u30a4\u30ba\u306f\u30c7\u30fc\u30bf\u8ee2\u9001\u3092\u9045\u304f\u3059\u308b\u306e\u3067\u3001\u52b9\u7387\u7684\u3067\u3059\u3002\u79c1\u306f\u30d6\u30ed\u30c3\u30af\u30b5\u30a4\u30ba\u3092\u5927\u304d\u304f\u3057\u3001\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u3092\u6709\u52b9\u306b\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u3053\u308c\u3092\u63d0\u4f9b\u3059\u308b\u306a\u3089\u3070\u3001\u4e26\u5217\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3057\u307e\u3059\u3002\u6700\u65b0\u306eSMB\u30d0\u30fc\u30b8\u30e7\u30f3\u3001\u6700\u65b0\u306eHTTP\u30b9\u30bf\u30c3\u30af\u3001\u6700\u9069\u5316\u3055\u308c\u305f\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30fb\u30a8\u30f3\u30b8\u30f3\u306f\u3001\u3053\u308c\u306b\u3088\u3063\u3066\u5927\u304d\u306a\u6069\u6075\u3092\u53d7\u3051\u308b\u3002\u307e\u305f\u3001TLS\u30aa\u30d5\u30ed\u30fc\u30c9\u3001MSS\u30af\u30e9\u30f3\u30d4\u30f3\u30b0\u3001\u30b8\u30e3\u30f3\u30dc\u30d5\u30ec\u30fc\u30e0\u3082\u3001\u30c1\u30a7\u30fc\u30f3\u5168\u4f53\u304c\u9069\u5207\u306b\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308c\u3070\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002\u3053\u308c\u3089\u306e\u8abf\u6574\u306b\u3088\u308a\u3001\u30a6\u30a3\u30f3\u30c9\u30a6\u306e\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u304c\u88dc\u5b8c\u3055\u308c\u3001\u5b9f\u8cea\u7684\u306a <strong>\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8<\/strong> \u3067\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\/05\/rechenzentrum_optimierung_4762.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30aa\u30fc\u30c8\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3092\u7406\u89e3\u3059\u308b\u9650\u754c\u3001\u30d2\u30e5\u30fc\u30ea\u30b9\u30c6\u30a3\u30c3\u30af\u3001\u8ce2\u660e\u306a\u30c7\u30d5\u30a9\u30eb\u30c8<\/h2>\n<p>\u30aa\u30fc\u30c8\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306f\u78ba\u5b9f\u306b\u6210\u529f\u3059\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u3002Linux\u3067\u306f <code>tcp_rmem<\/code>\/<code>tcp_wmem<\/code> \u3068\u308a\u308f\u3051 <code>net.core.rmem_max<\/code> \u305d\u3057\u3066 <code>net.core.wmem_max<\/code> \u306f\u30bd\u30b1\u30c3\u30c8\u3054\u3068\u306e\u4e0a\u9650\u5024\u3067\u3042\u308b\u3002\u306e\u9ad8\u3044WAN\u8ee2\u9001\u306b\u306f64-256MB\u306e\u3088\u3046\u306a\u5024\u3092\u63a8\u5968\u3059\u308b\u3002 <strong>BDP<\/strong>-\u6761\u4ef6\u306f\u5171\u901a\u3057\u3066\u3044\u308b\u3002\u79c1\u306f\u6d3b\u52d5\u3059\u308b <code>net.ipv4.tcp_moderate_rcvbuf=1<\/code>, \u30ab\u30fc\u30cd\u30eb\u304c\u5f90\u3005\u306b\u30ec\u30b7\u30fc\u30d6\u30fb\u30a6\u30a3\u30f3\u30c9\u30a6\u3092\u8d77\u52d5\u3059\u308b\u3088\u3046\u306b\u3057\u3001\u6b21\u306e\u3088\u3046\u306b\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002 <code>net.ipv4.tcp_adv_win_scale<\/code>, \u3053\u308c\u306f\u3001\u7a7a\u304d\u30d0\u30c3\u30d5\u30a1\u3092\u3069\u306e\u7a0b\u5ea6\u7a4d\u6975\u7684\u306b\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba\u306b\u5909\u63db\u3059\u308b\u304b\u3092\u6c7a\u5b9a\u3059\u308b\u3002. <code>tcp_timestamps<\/code> \u305d\u3057\u3066 <code>\u30b5\u30c3\u30af<\/code> \u518d\u9001\u4fe1\u306e\u30bf\u30fc\u30b2\u30c3\u30c8\u306b\u306a\u308a\u3001\u5927\u304d\u306a\u30a6\u30a4\u30f3\u30c9\u30a6\u3067\u306f\u6b20\u304b\u305b\u306a\u3044\u304b\u3089\u3060\u3002.<\/p>\n<p>Windows\u3067\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u52d5\u4f5c\u304c\u898b\u3089\u308c\u307e\u3059\u3002 <code>netsh int tcp show global<\/code> \u305d\u3057\u3066 <code>netsh int tcp show heuristics<\/code>. .\u79c1\u306f\u901a\u5e38\u3001\u8eca\u306e\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u30ec\u30d9\u30eb\u3092 <em>\u901a\u5e38<\/em> \u307e\u305f\u3001\u201e\u4f4e\u901f\u30ea\u30f3\u30af \u201c\u3068\u8a8d\u8b58\u3055\u308c\u305f\u30d1\u30b9\u306e\u30a6\u30a3\u30f3\u30c9\u30a6\u306e\u6210\u9577\u3092\u4e0d\u5fc5\u8981\u306b\u6e1b\u901f\u3055\u305b\u308b\u30d2\u30e5\u30fc\u30ea\u30b9\u30c6\u30a3\u30c3\u30af\u3092\u7121\u52b9\u306b\u3059\u308b\u3002\u3069\u3061\u3089\u306e\u4e16\u754c\u3067\u3082\u91cd\u8981\u3060\uff1a\u3069\u3061\u3089\u306e\u4e16\u754c\u3067\u3082\u91cd\u8981\u3067\u3042\u308b\u3002 <code>SO_RCVBUF<\/code>\/<code>SO_SNDBUF<\/code> \u306f\u3001\u81ea\u52d5\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3092\u52b9\u679c\u7684\u306b\u9045\u3089\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u305d\u306e\u305f\u3081\u79c1\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u30d7\u30ed\u30bb\u30b9\uff08\u30d7\u30ed\u30ad\u30b7\u3084\u8ee2\u9001\u30c7\u30fc\u30e2\u30f3\u306a\u3069\uff09\u306b\u305d\u306e\u3088\u3046\u306a\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u304c\u306a\u3044\u304b\u30c1\u30a7\u30c3\u30af\u3057\u3001\u305d\u308c\u306b\u5fdc\u3058\u3066\u8abf\u6574\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3002.<\/p>\n\n<h2>\u30c8\u30ec\u30fc\u30b9\u5206\u6790\uff1a\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3068\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u3067\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3053\u3068<\/h2>\n<p>Wireshark\u3067\u306f\u3001SYN\/SYN-ACK\u306e\u6a2a\u3092\u691c\u8a3c\u3059\u308b\u3002 <strong>\u30a6\u30a3\u30f3\u30c9\u30a6\u30b9\u30b1\u30fc\u30eb<\/strong> \u4f75\u305b\u3066 <em>\u30b5\u30c3\u30af\u53ef<\/em>, <em>\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7<\/em> \u305d\u3057\u3066\u3001\u305d\u306e <em>MSS<\/em>. .\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u3067\u306f\u3001\u201eBytes in flight\u201c\u3001\u201eTCP Window Size value\u201c\u3001\u201eCalculated Window Size \u201c\u3092\u898b\u308b\u3002\u3082\u3057\u8a08\u7b97\u3055\u308c\u305f\u30a6\u30a3\u30f3\u30c9\u30a6\u304c <code>\u30ea\u30fc\u30e0<\/code> \u30d5\u30e9\u30c3\u30c8\u3001\u30d6\u30ed\u30c3\u30af\u5236\u9650\u3001\u307e\u305f\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c <em>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u9650\u5b9a<\/em>. .\u307e\u305f\u3001TCP\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u30b0\u30e9\u30d5\uff08\u30bf\u30a4\u30e0\u30b7\u30fc\u30b1\u30f3\u30b9\u3001\u30a6\u30a3\u30f3\u30c9\u30a6\u306e\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\uff09\u3092\u4f7f\u3063\u3066\u3001\u30a6\u30a3\u30f3\u30c9\u30a6\u304c\u52d5\u7684\u306b\u6210\u9577\u3059\u308b\u304b\u3069\u3046\u304b\u3001\u518d\u9001\u3084\u9806\u5e8f\u5916\u306e\u30d1\u30b1\u30c3\u30c8\u304c\u52b9\u679c\u3092\u6253\u3061\u6d88\u3059\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3002.<\/p>\n\n<h2>MTU\u3001MSS\u3001\u30b8\u30e3\u30f3\u30dc\u30d5\u30ec\u30fc\u30e0\uff1a\u305d\u308c\u3089\u304c\u672c\u5f53\u306b\u3082\u305f\u3089\u3059\u3082\u306e<\/h2>\n<p>\u5927\u304d\u306a\u30a6\u30a3\u30f3\u30c9\u30a6\u304c\u52b9\u679c\u3092\u767a\u63ee\u3059\u308b\u306e\u306f\u3001\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u304c\u52b9\u7387\u7684\u306b\u6e80\u305f\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3060\u3051\u3060\u3002\u5f93\u3063\u3066\u3001\u79c1\u306f\u30d1\u30b9\u306b\u6cbf\u3063\u3066\u5b9f\u52b9MTU\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306b <code>IP\u30ea\u30f3\u30af<\/code> \u305d\u3057\u3066 <code>\u30a8\u30b9\u30c4\u30fc\u30eb<\/code> \u79c1\u306f\u5730\u57df\u306e\u9650\u754c\u3092\u8a8d\u8b58\u3057\u3066\u3044\u308b\u3002 <code>ping -M do -s<\/code> Path-MTU\u3092\u30c6\u30b9\u30c8\u3059\u308b\u3002PMTUD\u304c\u5931\u6557\u3057\u305f\u3089\u3001Linux\u3067\u30a2\u30af\u30c6\u30a3\u30d9\u30fc\u30c8\u3059\u308b\u3002 <code>net.ipv4.tcp_mtu_probing=1<\/code> \u307e\u305f\u306f\u30a8\u30c3\u30b8\u30fb\u30c7\u30d0\u30a4\u30b9\u306b\u8ce2\u660e\u306a MSS \u30af\u30e9\u30f3\u30d4\u30f3\u30b0\u3092\u8a2d\u5b9a\u3057\u3001\u30d5\u30e9\u30b0\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u56de\u907f\u3059\u308b\u3002\u30b8\u30e3\u30f3\u30dc\u30fb\u30d5\u30ec\u30fc\u30e0\uff089000\uff09\u306f\u3001\u5747\u8cea\u306b\u69cb\u6210\u3055\u308c\u305f\u30d5\u30a1\u30d6\u30ea\u30c3\u30af\u5185\u3067\u306f\u4fa1\u5024\u304c\u3042\u308a\u3001CPU\u8ca0\u8377\u3092\u8efd\u6e1b\u3057\u3001\u6b21\u306e\u3088\u3046\u306a\u52b9\u679c\u304c\u3042\u308a\u307e\u3059\u3002 <strong>\u30b0\u30c3\u30c9\u30fb\u30d7\u30c3\u30c8<\/strong>. .\u5bfe\u7167\u7684\u306b\u3001\u79c1\u306f\u30d8\u30c6\u30ed\u30b8\u30cb\u30a2\u30b9\u3084WAN\u30d1\u30b9\u30bb\u30b0\u30e1\u30f3\u30c8\u3092\u7d4c\u7531\u3057\u305f\u751f\u306eMTU\u5897\u52a0\u3088\u308a\u3082\u3001\u30af\u30ea\u30fc\u30f3\u306aPMTUD\u3068\u4e00\u8cab\u3057\u305fMSS\u5024\u3092\u512a\u5148\u3059\u308b\u3002.<\/p>\n\n<h2>\u640d\u5931\u3001ECN\u3001\u30ad\u30e5\u30fc\u7ba1\u7406<\/h2>\n<p>\u30a6\u30a3\u30f3\u30c9\u30a6\u304c\u5927\u304d\u3044\u3068\u3001\u5c0f\u3055\u306a\u30d1\u30b1\u30c3\u30c8\u30ed\u30b9\u7387\u3067\u3082\u5b9f\u969b\u306e\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3092\u5927\u5e45\u306b\u4f4e\u4e0b\u3055\u305b\u308b\u306e\u306b\u5341\u5206\u3067\u3059\u3002\u305d\u3053\u3067\u79c1\u306f\u3001ECN\u304c\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3001\u30d1\u30b9\u4e0a\u3067\u30af\u30ea\u30a2\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u3069\u3046\u304b\u3092\u7a4d\u6975\u7684\u306b\u30c1\u30a7\u30c3\u30af\u3057\u3001\u30a8\u30c3\u30b8\u30fb\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u4e0a\u306eAQM\uff08FQ-CoDel\u306a\u3069\uff09\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u3044\u308b\u3002\u3053\u308c\u306b\u3088\u308a <em>\u5f85\u3061\u884c\u5217\u9045\u5ef6<\/em> \u305d\u3057\u3066\u3001\u30a6\u30a3\u30f3\u30c9\u30a6\u3092\u4eba\u70ba\u7684\u306b\u5c0f\u3055\u304f\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u30d0\u30c3\u30d5\u30a1\u30d6\u30ed\u30fc\u30c8\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u308b\u3002Linux\u3067\u306f\u3001RACK\/TLP\u306e\u3088\u3046\u306a\u6700\u65b0\u306e\u30ed\u30b9\u30c7\u30a3\u30c6\u30af\u30bf\u304c\u3001\u3088\u308a\u901f\u304f\u30c6\u30a4\u30eb\u3092\u9589\u3058\u308b\u306e\u306b\u5f79\u7acb\u3063\u3066\u3044\u308b\u3002\u983b\u7e41\u306b\u30d0\u30fc\u30b9\u30c8\u304c\u767a\u751f\u3059\u308b\u74b0\u5883\u3067\u306f\u3001\u30da\u30fc\u30b7\u30f3\u30b0\u304c\u53ef\u80fd\u306a\u8f3b\u8f33\u5236\u5fa1\uff08\u30d0\u30a4\u30c8\u30ad\u30e5\u30fc\u5236\u9650\u3092\u6301\u3064CUBIC\u3084BBR\u306a\u3069\uff09\u306b\u983c\u308b\u304c\u3001\u305d\u308c\u3067\u3082\u53d7\u4fe1\u30a6\u30a3\u30f3\u30c9\u30a6\u304c\u5341\u5206\u306b\u5927\u304d\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3002.<\/p>\n\n<h2>\u30b5\u30fc\u30d0\u30fc\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8868\u793a\uff1a\u30bd\u30b1\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u610f\u8b58\u7684\u306b\u4f7f\u3046<\/h2>\n<p>\u591a\u304f\u306e\u30b5\u30fc\u30d0\u30fc\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u3092\u30cf\u30fc\u30c9\u306b\u8a2d\u5b9a\u3057\u3001\u305d\u306e\u7d50\u679c\u3001\u6210\u9577\u3092\u5236\u9650\u3057\u3066\u3044\u308b\u3002\u79c1\u306f\u3001\u958b\u59cb\u5024\u3068\u30d4\u30fc\u30af\u5024\u3092\u660e\u793a\u7684\u306b <code>ss<\/code> (Linux)\u3092\u89b3\u5bdf\u3059\u308b <em>\u30b9\u30b1\u30e0<\/em>\/<em>rcv_space<\/em>. .\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30fb\u30ec\u30d9\u30eb\u3067\u306f\u3001\u30d6\u30ed\u30c3\u30af\u30fb\u30b5\u30a4\u30ba\u3068\u30ec\u30b3\u30fc\u30c9\u30fb\u30b5\u30a4\u30ba\u3092\u8abf\u6574\u3057\u3001\u30ca\u30b0\u30eb(<code>TCP_NODELAY<\/code>)\u306f\u3001\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3088\u308a\u3082\u30e1\u30c3\u30bb\u30fc\u30b8\u3042\u305f\u308a\u306e\u30ec\u30a4\u30c6\u30f3\u30b7\u304c\u91cd\u8981\u306a\u5834\u5408\u306b\u306e\u307f\u4f7f\u7528\u3057\u3001\u3088\u308a\u5927\u304d\u306a\u9001\u4fe1\u30e6\u30cb\u30c3\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u9045\u5ef6ACK\u306e\u5f71\u97ff\u3092\u8efd\u6e1b\u3057\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u8ee2\u9001\u306b\u306f <code>sendfile()<\/code> \u307e\u305f\u306f\u30bc\u30ed\u30b3\u30d4\u30fc\u30fb\u30e1\u30ab\u30cb\u30ba\u30e0\u3084\u975e\u540c\u671fI\/O\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u7a7a\u9593\u304c\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3002.<\/p>\n\n<h2>10\/25\/40\/100G\u3078\u306e\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\uff1aCPU\u3001\u30aa\u30d5\u30ed\u30fc\u30c9\u3001\u30de\u30eb\u30c1\u30ad\u30e5\u30fc<\/h2>\n<p>\u5927\u304d\u306a\u30a6\u30a3\u30f3\u30c9\u30a6\u306f\u30db\u30b9\u30c8\u3092\u5fc5\u8981\u3068\u3059\u308b\u3002TSO\/GSO\u3068GRO\/LRO\u304c\u30a2\u30af\u30c6\u30a3\u30d6\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u304c\u30e9\u30fc\u30b8\u30bb\u30b0\u30e1\u30f3\u30c8\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3002RSS\/Multiqueue\u3092\u4f7f\u3063\u3066\u8907\u6570\u306e\u30b3\u30a2\u306b\u30d5\u30ed\u30fc\u3092\u5206\u6563\u3055\u305b\u3001IRQ\u30a2\u30d5\u30a3\u30cb\u30c6\u30a3\u30fc\u3092NUMA\u30c8\u30dd\u30ed\u30b8\u30fc\u306b\u9069\u5fdc\u3055\u305b\u3001SoftIRQ\u306e\u8ca0\u8377\u3092\u30e2\u30cb\u30bf\u30fc\u3057\u307e\u3059\u3002\u30c7\u30d0\u30a4\u30b9\u5074\u3067\u306f\u3001\u30db\u30b9\u30c8\u304c\u5272\u308a\u8fbc\u307f\u306e\u5d50\u306b\u906d\u9047\u3057\u306a\u3044\u3088\u3046\u306b\u3001\u30ea\u30f3\u30b0\u30d0\u30c3\u30d5\u30a1\u3068\u5272\u308a\u8fbc\u307f\u5408\u4f53\u3092\u8abf\u6574\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u3059\u3079\u3066\u306b\u3088\u308a\u3001CPU\u306e\u9650\u754c\u306b\u3088\u3063\u3066\u30a6\u30a3\u30f3\u30c9\u30a6\u30fb\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u304c\u5931\u6557\u3059\u308b\u3053\u3068\u304c\u306a\u304f\u3001\u9054\u6210\u3055\u308c\u305f\u30ec\u30fc\u30c8\u304c\u518d\u73fe\u53ef\u80fd\u306a\u307e\u307e\u3067\u3042\u308b\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u308b\u3002.<\/p>\n\n<h2>\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u306e\u30d1\u30b9\uff1a\u76ee\u6a19\u30ec\u30fc\u30c8\u304b\u3089\u30b3\u30f3\u30d5\u30a3\u30ae\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u307e\u3067<\/h2>\n<ul>\n  <li>\u76ee\u6a19\u306e\u5b9a\u7fa9\uff1a\u5e0c\u671b\u3059\u308b\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3068\u6e2c\u5b9a\u3055\u308c\u305fRTT\uff08\u4f8b\uff1a40ms\u30675Gbit\/s\uff09\u3002.<\/li>\n  <li><strong>BDP<\/strong> \u8a08\u7b97\uff1a5Gbit\/s\u00d70.04\u79d2\uff1d200Mbit\u225225MB\u306e\u30a6\u30a3\u30f3\u30c9\u30a6\u3002.<\/li>\n  <li>Linux\u306e\u5236\u9650\u3092\u8a2d\u5b9a\u3059\u308b\uff1a <code>sysctl -w net.core.rmem_max=268435456<\/code>, <code>net.core.wmem_max=268435456<\/code>, <code>net.ipv4.tcp_rmem=\"4096 87380 268435456\"<\/code>, <code>net.ipv4.tcp_wmem=\"4096 65536 268435456\"<\/code>, <code>net.ipv4.tcp_moderate_rcvbuf=1<\/code>.<\/li>\n  <li>\u30a6\u30a3\u30f3\u30c9\u30a6\u30ba\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\uff1a <code>netsh int tcp show global<\/code>; \u30ab\u30fc\u30fb\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0 <em>\u901a\u5e38<\/em>, \u30b9\u30ed\u30c3\u30c8\u30eb\u30fb\u30d2\u30e5\u30fc\u30ea\u30b9\u30c6\u30a3\u30c3\u30af\u3067\u306f\u306a\u3044\u3002.<\/li>\n  <li>\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u691c\u8a3c\uff1aWireshark - Window Scale\u3001MSS\u3001SACK\/Timestamps\u304c\u5229\u7528\u53ef\u80fd\u3002.<\/li>\n  <li>\u30bb\u30ad\u30e5\u30a2MTU\/MSS\uff1aPMTUD\u6a5f\u80fd\u307e\u305f\u306f\u30d1\u30b9\u306b\u6cbf\u3063\u305fMSS\u30ad\u30e3\u30f3\u30d7\u3002.<\/li>\n  <li>\u8f3b\u8f33\u5236\u5fa1\u3068AQM\u3092\u8a2d\u5b9a\uff1a\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306b\u5408\u81f4\u3059\u308bCUBIC\/BBR\u3001\u30a8\u30c3\u30b8\u3067\u6709\u52b9\u306aECN\/AQM\u3002.<\/li>\n  <li>\u3068\u4e00\u7dd2\u306b <code>iperf3<\/code> \u3092\u691c\u8a3c\u3059\u308b\uff1a\u30b7\u30f3\u30b0\u30eb\u304a\u3088\u3073\u30de\u30eb\u30c1\u30b9\u30c8\u30ea\u30fc\u30e0(<code>-P<\/code>)\u3001TLS\/\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u6709\u7121\u306b\u304b\u304b\u308f\u3089\u305a\u3002.<\/li>\n  <li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30fb\u30d0\u30c3\u30d5\u30a1\u306e\u30c1\u30a7\u30c3\u30af\uff1a\u5c0f\u3055\u3044\u3082\u306e\u306f\u306a\u3044 <code>SO_RCVBUF<\/code>\/<code>SO_SNDBUF<\/code> \u30bb\u30c3\u30c8\u3001\u30d6\u30ed\u30c3\u30af\u30b5\u30a4\u30ba\u3092\u5897\u3084\u3059\u3002.<\/li>\n<\/ul>\n\n<h2>\u5178\u578b\u7684\u306a\u843d\u3068\u3057\u7a74\u3068\u7c21\u5358\u306a\u30c1\u30a7\u30c3\u30af<\/h2>\n\n<p>\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3084\u30eb\u30fc\u30bf\u30fc\u3067\u3001\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3088\u304f\u3042\u308b\u3002 <strong>\u30aa\u30d7\u30b7\u30e7\u30f3<\/strong> \u3092TCP\u30d8\u30c3\u30c0\u30fc\u306b\u542b\u3081\u308b\u304b\u3001\u7834\u68c4\u3059\u308b\u3002\u975e\u5bfe\u79f0\u30d1\u30b9\u306f\u3001\u30a2\u30a6\u30c8\u30d0\u30a6\u30f3\u30c9\u30d1\u30b9\u3068\u30ea\u30bf\u30fc\u30f3\u30d1\u30b9\u304c\u7570\u306a\u308b\u30dd\u30ea\u30b7\u30fc\u3092\u901a\u308b\u305f\u3081\u3001\u554f\u984c\u3092\u60aa\u5316\u3055\u305b\u308b\u3002\u30a2\u30af\u30bb\u30b9\u30eb\u30fc\u30bf\u30fc\u3067\u306e\u7a4d\u6975\u7684\u306aTCP\u6b63\u898f\u5316\u3082\u3001\u6b63\u3057\u3044\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3092\u7834\u58ca\u3059\u308b\u3002\u30d0\u30c3\u30d5\u30a1\u3068\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u304c\u53b3\u3057\u3059\u304e\u308b\u3068\u3001\u30ed\u30b9\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306e\u56de\u5fa9\u30d5\u30a7\u30fc\u30ba\u304c\u9577\u304f\u306a\u308b\u3002\u79c1\u306f\u3001\u5206\u96e2\u3055\u308c\u305f\u30a6\u30a3\u30f3\u30c9\u30a6\u3067\u5909\u66f4\u3092\u30c6\u30b9\u30c8\u3057\u3001\u518d\u9001\u4fe1\u3092\u89b3\u5bdf\u3057\u3001\u6bb5\u968e\u7684\u306b\u8abf\u6574\u3059\u308b\u3053\u3068\u3067\u3001TCP\u306e\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u304c\u6b63\u3057\u304f\u884c\u308f\u308c\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3002 <strong>\u5b89\u5b9a\u6027<\/strong> \u306f\u4fdd\u5b58\u3055\u308c\u308b\u3002<\/p>\n\n<h2>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u3068\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u306e\u80cc\u666f<\/h2>\n\n<p>\u751f\u7523\u7684\u306a\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3067\u306f\u3001\u591a\u304f\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u540c\u3058\u3082\u306e\u3092\u5171\u6709\u3059\u308b\u3002 <strong>\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u30fc<\/strong>, \u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u3042\u305f\u308a\u306e\u52b9\u7387\u7684\u306a\u5229\u7528\u304c\u91cd\u8981\u3067\u3059\u3002\u30ea\u30fc\u30d5\u30b9\u30d1\u30a4\u30f3\u30c8\u30dd\u30ed\u30b8\u3001\u77ed\u3044\u6771\u897f\u30d1\u30b9\u3001\u5341\u5206\u306a\u30a2\u30c3\u30d7\u30ea\u30f3\u30af\u304b\u3089\u6069\u6075\u3092\u53d7\u3051\u3066\u3044\u307e\u3059\u3002\u6700\u65b0\u306e\u8f3b\u8f33\u5236\u5fa1\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3001\u30af\u30ea\u30fc\u30f3\u306a\u30ad\u30e5\u30fc\u7ba1\u7406\u3001\u30ed\u30d0\u30b9\u30c8\u306aQoS\u30eb\u30fc\u30eb\u306b\u3088\u308a\u3001\u7d50\u679c\u306f\u518d\u73fe\u53ef\u80fd\u3067\u3059\u3002\u30d4\u30fc\u30af\u6642\u306e\u8ca0\u8377\u3068\u4e26\u5217\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u8003\u616e\u3057\u3066\u3001\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba\u3068\u30d0\u30c3\u30d5\u30a1\u3092\u8a08\u753b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u4e00\u5b9a\u306b\u4fdd\u3061\u3001\u4ee5\u4e0b\u306e\u5f71\u97ff\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <strong>\u30a6\u30a3\u30f3\u30c9\u30a6\u306e\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0<\/strong> \u306f\u3059\u3079\u3066\u306e\u30b5\u30fc\u30d3\u30b9\u306b\u5230\u7740\u3059\u308b\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\/05\/servernetzwerkoptimierung-1837.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u3068\u7d99\u7d9a\u7684\u306a\u6700\u9069\u5316<\/h2>\n\n<p>\u3067\u5b9a\u671f\u7684\u306b\u6e2c\u5b9a\u3057\u3066\u3044\u308b\u3002 <code>iperf3<\/code> \u30ed\u30b1\u30fc\u30b7\u30e7\u30f3\u9593\u306eRTT\u3001\u30b8\u30c3\u30bf\u30fc\u3001\u518d\u9001\u4fe1\u3092\u8ffd\u8de1\u3059\u308b\u3002 <strong>\u30b0\u30c3\u30c9\u30fb\u30d7\u30c3\u30c8<\/strong>. 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