{"id":16573,"date":"2026-01-05T15:06:20","date_gmt":"2026-01-05T14:06:20","guid":{"rendered":"https:\/\/webhosting.de\/datenbank-deadlocks-hosting-locktest-serverboost\/"},"modified":"2026-01-05T15:06:20","modified_gmt":"2026-01-05T14:06:20","slug":"%e3%83%87%e3%83%bc%e3%82%bf%e3%83%99%e3%83%bc%e3%82%b9%e3%83%87%e3%83%83%e3%83%89%e3%83%ad%e3%83%83%e3%82%af%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0%e3%83%ad%e3%82%b1%e3%83%83%e3%83%88","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/datenbank-deadlocks-hosting-locktest-serverboost\/","title":{"rendered":"\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3051\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\uff1a\u767a\u751f\u983b\u5ea6\u304c\u9ad8\u3044\u7406\u7531"},"content":{"rendered":"<p>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u74b0\u5883\u3067\u306f\u3001 <strong>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c7\u30c3\u30c9\u30ed\u30c3\u30af<\/strong> \u5171\u6709\u30ea\u30bd\u30fc\u30b9\u3001\u4e0d\u5747\u7b49\u306a\u8ca0\u8377\u3001\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u30af\u30a8\u30ea\u306b\u3088\u308a\u30ed\u30c3\u30af\u304c\u9577\u304f\u7d9a\u304f\u305f\u3081\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u304c\u983b\u7e41\u306b\u767a\u751f\u3057\u307e\u3059\u3002\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u30d4\u30fc\u30af\u6642\u306b\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u304c\u5897\u52a0\u3059\u308b\u7406\u7531\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306e\u767a\u751f\u539f\u56e0\u3001\u304a\u3088\u3073\u969c\u5bb3\u3084 <strong>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306e\u554f\u984c<\/strong> \u3092\u907f\u3051\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/p>\n\n<h2>\u4e2d\u5fc3\u70b9<\/h2>\n\n<ul>\n  <li><strong>\u5171\u6709\u30ea\u30bd\u30fc\u30b9<\/strong> \u30ed\u30c3\u30af\u6642\u9593\u3092\u5ef6\u9577\u3057\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306e\u30ea\u30b9\u30af\u3092\u9ad8\u3081\u307e\u3059\u3002.<\/li>\n  <li><strong>\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30c7\u30b6\u30a4\u30f3<\/strong> \u305d\u3057\u3066\u3001\u4e00\u8cab\u3057\u305f\u30ed\u30c3\u30af\u306e\u9806\u5e8f\u304c\u5b89\u5b9a\u6027\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/strong> \u307e\u305f\u3001\u77ed\u3044\u30af\u30a8\u30ea\u306f\u8ca0\u8377\u6642\u306e\u30ed\u30c3\u30af\u6642\u9593\u3092\u77ed\u7e2e\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>\u30ad\u30e3\u30c3\u30b7\u30f3\u30b0<\/strong> \u30db\u30c3\u30c8\u30ad\u30fc\u306e\u7af6\u5408\u3092\u6e1b\u3089\u3057\u3001DB\u306e\u8ca0\u8377\u3092\u8efd\u6e1b\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0<\/strong> \u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u30b3\u30fc\u30c9\u3001LCK\u5f85\u6a5f\u6642\u9593\u3001P95\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u8868\u793a\u3057\u307e\u3059\u3002.<\/li>\n<\/ul>\n\n<h2>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u3067\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u304c\u983b\u7e41\u306b\u767a\u751f\u3059\u308b\u7406\u7531<\/h2>\n\n<p>\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306f\u3001\u8907\u6570\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c CPU\u3001RAM\u3001I\/O \u3092\u5171\u6709\u3057\u3001\u30ed\u30c3\u30af\u304c\u5fc5\u8981\u4ee5\u4e0a\u306b\u9577\u304f\u6709\u52b9\u306a\u307e\u307e\u306b\u306a\u308b\u5834\u5408\u306b\u7279\u306b\u767a\u751f\u3059\u308b\u3068\u8003\u3048\u3089\u308c\u307e\u3059\u3002 <strong>\u884c\u304d\u6b62\u307e\u308a<\/strong> \u6709\u5229\u306b\u306a\u308a\u307e\u3059\u3002\u5171\u6709\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u8ca0\u8377\u306e\u30d4\u30fc\u30af\u6642\u306b\u500b\u3005\u306e\u30af\u30a8\u30ea\u3092\u9045\u304f\u3059\u308b\u305f\u3081\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u5f85\u3061\u6642\u9593\u304c\u9577\u304f\u306a\u308a\u307e\u3059\u3002\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u901a\u5e38\u52d5\u4f5c\u3067\u306f\u591a\u304f\u306e\u5f31\u70b9\u3092\u96a0\u3057\u307e\u3059\u304c\u3001\u7a81\u7136\u306e\u30b9\u30d1\u30a4\u30af\u304c\u767a\u751f\u3059\u308b\u3068\u72b6\u6cc1\u304c\u4e00\u5909\u3057\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u304c\u983b\u767a\u3057\u307e\u3059\u3002\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u30d7\u30e9\u30b0\u30a4\u30f3\u3001N+1 \u30af\u30a8\u30ea\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u6b20\u5982\u306f\u3001\u884c\u30ed\u30c3\u30af\u3084\u30da\u30fc\u30b8\u30ed\u30c3\u30af\u306e\u7af6\u5408\u3092\u6fc0\u5316\u3055\u305b\u307e\u3059\u3002 SERIALIZABLE \u306a\u3069\u306e\u9ad8\u3044\u5206\u96e2\u30ec\u30d9\u30eb\u306f\u3001\u3055\u3089\u306b\u30d7\u30ec\u30c3\u30b7\u30e3\u30fc\u3092\u5897\u5927\u3055\u305b\u3001\u30b8\u30c3\u30bf\u30fc\u306e\u306a\u3044\u81ea\u52d5\u518d\u8a66\u884c\u306f\u3001\u7af6\u5408\u3092\u3055\u3089\u306b\u60aa\u5316\u3055\u305b\u307e\u3059\u3002 <strong>\u5f37\u5316\u3059\u308b<\/strong>.<\/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\/01\/datenbank-deadlock-hosting-2741.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>MySQL\u306e\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u304c\u767a\u751f\u3059\u308b\u4ed5\u7d44\u307f<\/h2>\n\n<p>2\u3064\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u304c\u540c\u3058\u30ea\u30bd\u30fc\u30b9\u3092\u7570\u306a\u308b\u9806\u5e8f\u3067\u30ed\u30c3\u30af\u3057\u3001\u4e21\u65b9\u304c\u4e92\u3044\u3092\u5f85\u6a5f\u3059\u308b\u3053\u3068\u3067\u3001\u53e4\u5178\u7684\u306amysql\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u304c\u767a\u751f\u3057\u307e\u3059\u3002 <strong>\u5c01\u9396<\/strong> \u767a\u751f\u3057\u307e\u3059\u3002\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3 A \u306f\u3001\u305f\u3068\u3048\u3070\u30c6\u30fc\u30d6\u30eb 1 \u306e\u884c\u30ed\u30c3\u30af\u3092\u4fdd\u6301\u3057\u3066\u304a\u308a\u3001\u30c6\u30fc\u30d6\u30eb 2 \u3092\u30ed\u30c3\u30af\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u307e\u3059\u3002\u4e00\u65b9\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3 B \u306f\u3059\u3067\u306b\u30c6\u30fc\u30d6\u30eb 2 \u3092\u4fdd\u6301\u3057\u3066\u304a\u308a\u3001\u30c6\u30fc\u30d6\u30eb 1 \u3092\u30bf\u30fc\u30b2\u30c3\u30c8\u306b\u3057\u3066\u3044\u307e\u3059\u3002MySQL \u306f\u3053\u306e\u5faa\u74b0\u3092\u8a8d\u8b58\u3057\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u4e2d\u65ad\u3057\u307e\u3059\u3002\u305d\u306e\u7d50\u679c\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u306e\u30d4\u30fc\u30af\u3084\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u767a\u751f\u3057\u307e\u3059\u3002 \u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u74b0\u5883\u3067\u306f\u3001\u8907\u6570\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u540c\u3058\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u5171\u6709\u3059\u308b\u305f\u3081\u3001\u3053\u306e\u3088\u3046\u306a\u7af6\u5408\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u8a2d\u8a08\u3067\u306f\u3001\u79c1\u306f\u4ee5\u4e0b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002 <a href=\"https:\/\/webhosting.de\/ja\/mysql-%e3%82%b9%e3%83%88%e3%83%ac%e3%83%bc%e3%82%b8%e3%82%a8%e3%83%b3%e3%82%b8%e3%83%b3-innodb-myisam-%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-serverflux\/\">InnoDB \u3068 MyISAM<\/a> InnoDB \u306e\u884c\u30ec\u30d9\u30eb\u30ed\u30c3\u30af\u306f\u30ed\u30c3\u30af\u306e\u7af6\u5408\u3092\u5927\u5e45\u306b\u6e1b\u3089\u3057\u3001 <strong>\u30ea\u30b9\u30af<\/strong>.<\/p>\n\n<h2>\u30ed\u30c3\u30af\u306e\u57fa\u672c\u306b\u3064\u3044\u3066\u7c21\u5358\u306b\u8aac\u660e<\/h2>\n\n<p>\u79c1\u306f\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3092\u3001\u5171\u6709\u30ed\u30c3\u30af\u3068\u6392\u4ed6\u30ed\u30c3\u30af\u306e\u76f8\u4e92\u4f5c\u7528\u306b\u3088\u3063\u3066\u5e38\u306b\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u6700\u5c0f\u5316<\/strong>. \u5171\u6709\u30ed\u30c3\u30af\u306f\u4e26\u884c\u8aad\u307f\u53d6\u308a\u3092\u8a31\u53ef\u3057\u307e\u3059\u304c\u3001\u6392\u4ed6\u30ed\u30c3\u30af\u306f\u6392\u4ed6\u66f8\u304d\u8fbc\u307f\u3092\u5f37\u5236\u3057\u307e\u3059\u3002\u66f4\u65b0\u30ed\u30c3\u30af\uff08SQL Server\uff09\u3068\u30a4\u30f3\u30c6\u30f3\u30c8\u30ed\u30c3\u30af\u306f\u3001\u3088\u308a\u8907\u96d1\u306a\u30a2\u30af\u30bb\u30b9\u3092\u8abf\u6574\u3057\u3001\u30a8\u30f3\u30b8\u30f3\u306e\u8a08\u753b\u7acb\u6848\u3092\u5bb9\u6613\u306b\u3057\u307e\u3059\u3002\u8ca0\u8377\u304c\u9ad8\u3044\u5834\u5408\u3001\u30ed\u30c3\u30af\u306f\u3088\u308a\u9577\u304f\u7dad\u6301\u3055\u308c\u308b\u305f\u3081\u3001\u30ad\u30e5\u30fc\u304c\u6e80\u676f\u306b\u306a\u308a\u3001\u30b5\u30a4\u30af\u30eb\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002\u30ed\u30c3\u30af\u306e\u7a2e\u985e\u3092\u7406\u89e3\u3057\u3066\u3044\u308b\u4eba\u306f\u3001\u5206\u96e2\u30ec\u30d9\u30eb\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3001\u30af\u30a8\u30ea\u8a2d\u8a08\u306b\u3064\u3044\u3066\u3088\u308a\u9069\u5207\u306a\u5224\u65ad\u3092\u4e0b\u3057\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306e\u53ef\u80fd\u6027\u3092\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<strong>\u30aa\u30c3\u30ba<\/strong>.<\/p>\n\n<table>\n  <thead>\n    <tr>\n      <th>\u30ed\u30c3\u30af\u30bf\u30a4\u30d7<\/th>\n      <th>\u8a31\u53ef\u3055\u308c\u305f\u64cd\u4f5c<\/th>\n      <th>\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306e\u30ea\u30b9\u30af<\/th>\n      <th>\u5b9f\u7528\u7684\u306a\u30d2\u30f3\u30c8<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u5171\u6709 (S)<\/td>\n      <td>\u8aad\u3080<\/td>\n      <td>\u77ed\u3044\u8aad\u307f\u53d6\u308a\u3067\u306f\u4f4e\u3044<\/td>\n      <td>\u5fc5\u8981\u306a\u5217\u306e\u307f\u3092\u8aad\u307f\u8fbc\u307f\u3001SELECT * \u306f\u4f7f\u7528\u3057\u306a\u3044<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30a8\u30af\u30b9\u30af\u30eb\u30fc\u30b7\u30d6 (X)<\/td>\n      <td>\u624b\u7d19<\/td>\n      <td>\u9577\u3044\u53d6\u5f15\u3067\u306f\u9ad8\u3044<\/td>\n      <td>\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u77ed\u304f\u4fdd\u3061\u3001\u30d0\u30c3\u30c1\u30b5\u30a4\u30ba\u3092\u5236\u9650\u3059\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>\u66f4\u65b0 (U)<\/td>\n      <td>X\u3078\u306e\u524d\u6bb5\u968e<\/td>\n      <td>\u624b\u6bb5\u3001S\u2192X\u306e\u885d\u7a81\u3092\u9632\u3050<\/td>\n      <td>\u30a2\u30c3\u30d7\u30b5\u30fc\u30c8\u306b\u304a\u3051\u308b\u7d1b\u4e89\u306e\u8efd\u6e1b<\/td>\n    <\/tr>\n    <tr>\n      <td>\u610f\u56f3\uff08IS\/IX\uff09<\/td>\n      <td>\u968e\u5c64\u8abf\u6574<\/td>\n      <td>\u4f4e\u3044<\/td>\n      <td>\u968e\u5c64\u7684\u306a\u30ed\u30c3\u30af\u3092\u7406\u89e3\u3057\u3001\u8aac\u660e\u3092\u78ba\u8a8d\u3059\u308b<\/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\/01\/deadlock_hosting_meeting_9381.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u65ad\u71b1\u6750\u3068\u30a8\u30f3\u30b8\u30f3\u306e\u6bd4\u8f03<\/h2>\n\n<p>\u79c1\u306f\u610f\u56f3\u7684\u306b\u5206\u96e2\u30ec\u30d9\u30eb\u3092\u9078\u629e\u3057\u3066\u3044\u307e\u3059\u3002READ COMMITTED \u306f\u591a\u304f\u306e\u5834\u5408\u3001Web \u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306b\u5341\u5206\u3067\u3042\u308a\u3001\u30ed\u30c3\u30af\u306e\u7af6\u5408\u3092\u5927\u5e45\u306b\u8efd\u6e1b\u3057\u307e\u3059\u3002MySQL \u306e\u6a19\u6e96\u3067\u3042\u308b REPEATABLE READ \u306f\u3001\u7bc4\u56f2\u30af\u30a8\u30ea\uff08BETWEEN\u3001LIMIT \u4ed8\u304d ORDER BY \u306a\u3069\uff09\u3067\u8ffd\u52a0\u306e\u30ae\u30e3\u30c3\u30d7\u3092\u30ed\u30c3\u30af\u3057\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3092\u767a\u751f\u3055\u305b\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b Next-Key-Locks \u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 \u3053\u306e\u3088\u3046\u306a\u5834\u5408\u3001\u79c1\u306f\u610f\u56f3\u7684\u306b READ COMMITTED \u306b\u5207\u308a\u66ff\u3048\u308b\u304b\u3001\u30ae\u30e3\u30c3\u30d7\u30ed\u30c3\u30af\u306e\u767a\u751f\u3092\u6e1b\u3089\u3059\u3088\u3046\u306b\u30af\u30a8\u30ea\u3092\u5909\u66f4\u3057\u307e\u3059\u3002PostgreSQL \u306f MVCC \u30d9\u30fc\u30b9\u3067\u52d5\u4f5c\u3057\u3001\u30ea\u30fc\u30c0\u30fc\u3068\u30e9\u30a4\u30bf\u30fc\u304c\u4e92\u3044\u306b\u30ed\u30c3\u30af\u3055\u308c\u308b\u3053\u3068\u306f\u3042\u307e\u308a\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u540c\u3058\u884c\u306e\u7af6\u5408\u3059\u308b\u66f4\u65b0\u3084 FOR UPDATE \u3067\u306f\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 SQL Server \u3067\u306f\u3001\u5927\u898f\u6a21\u306a\u30b9\u30ad\u30e3\u30f3\u6642\u306b\u591a\u304f\u306e\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u540c\u6642\u306b\u30d6\u30ed\u30c3\u30af\u3059\u308b\u30ed\u30c3\u30af\u30a8\u30b9\u30ab\u30ec\u30fc\u30b7\u30e7\u30f3\uff08\u884c\u304b\u3089\u30da\u30fc\u30b8\/\u30c6\u30fc\u30d6\u30eb\u3078\uff09\u304c\u89b3\u5bdf\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3057\u3066\u30b9\u30ad\u30e3\u30f3\u9818\u57df\u3092\u7e2e\u5c0f\u3057\u3001\u66f8\u304d\u8fbc\u307f\u306e\u591a\u3044\u30c6\u30fc\u30d6\u30eb\u306b\u9069\u5207\u306a FILLFACTOR \u5024\u3092\u8a2d\u5b9a\u3057\u3001\u30db\u30c3\u30c8\u30da\u30fc\u30b8\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30a8\u30f3\u30b8\u30f3\u8a73\u7d30\u306f\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3092\u7de9\u548c\u3059\u308b\u305f\u3081\u306b\u79c1\u304c\u6700\u521d\u306b\u7740\u624b\u3059\u308b\u90e8\u5206\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002.<\/p>\n\n<h2>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u7279\u6709\u306e\u843d\u3068\u3057\u7a74\u3068\u3001\u305d\u308c\u3092\u56de\u907f\u3059\u308b\u65b9\u6cd5<\/h2>\n\n<p>\u63a5\u7d9a\u30d7\u30fc\u30eb\u306f\u3001\u5f85\u3061\u884c\u5217\u3084\u904e\u98fd\u548c\u306b\u3088\u308b\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3092\u4e0d\u5fc5\u8981\u306b\u767a\u751f\u3055\u305b\u306a\u3044\u3088\u3046\u3001\u5c0f\u3055\u3059\u304e\u305a\u5927\u304d\u3059\u304e\u305a\u306e\u8a2d\u5b9a\u3068\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u4fc3\u9032\u3059\u308b<\/strong>. \u9069\u5207\u306b\u8a2d\u8a08\u3055\u308c\u305f <a href=\"https:\/\/webhosting.de\/ja\/%e3%83%87%e3%83%bc%e3%82%bf%e3%83%99%e3%83%bc%e3%82%b9-%e3%83%97%e3%83%bc%e3%83%ab-%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\/\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30d7\u30fc\u30ea\u30f3\u30b0<\/a> \u30ec\u30a4\u30c6\u30f3\u30b7\u3068\u5f85\u6a5f\u6642\u9593\u3092\u6291\u3048\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u52d5\u4f5c\u3092\u5b89\u5b9a\u3055\u305b\u307e\u3059\u3002\u30db\u30c3\u30c8\u30ad\u30fc\u304c\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u3001\u30ab\u30fc\u30c8\u3001\u6a5f\u80fd\u30d5\u30e9\u30b0\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\u3057\u307e\u3059\u3002 \u5171\u6709\u30b9\u30c8\u30ec\u30fc\u30b8\u3067\u306f\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306e\u691c\u51fa\u5f8c\u306b\u9045\u3044 I\/O \u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u304c\u901f\u5ea6\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u305f\u3081\u3001IOPS \u306e\u4e88\u5099\u3092\u8a08\u753b\u3057\u3066\u3044\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u8ca0\u8377\u304c\u304b\u304b\u3063\u305f\u72b6\u614b\u3067\u3082\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u5236\u5fa1\u3055\u308c\u308b\u3088\u3046\u306b\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u30ec\u30fc\u30c8\u3068\u30ad\u30e5\u30fc\u306e\u9577\u3055\u306b\u5236\u9650\u3092\u8a2d\u3051\u3066\u3044\u307e\u3059\u3002 <strong>abbaut<\/strong> \u5d29\u58ca\u3059\u308b\u4ee3\u308f\u308a\u306b\u3002.<\/p>\n\n<h2>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\u306b\u304a\u3051\u308b\u5178\u578b\u7684\u306a\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3<\/h2>\n\n<p>\u79c1\u306f\u3001\u4e9b\u7d30\u306a\u30d1\u30bf\u30fc\u30f3\u306b\u3088\u3063\u3066\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u304c\u983b\u7e41\u306b\u767a\u751f\u3057\u3066\u3044\u308b\u306e\u3092\u76ee\u306b\u3057\u307e\u3059\u3002DB \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u5185\u3067\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u3084\u30ea\u30e2\u30fc\u30c8\u30b3\u30fc\u30eb\u3092\u5b9f\u884c\u3059\u308b\u9577\u3044\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3001\u6c17\u3065\u304b\u306a\u3044\u3046\u3061\u306b SELECT N+1 \u3084\u4e0d\u8981\u306a UPDATE \u3092\u751f\u6210\u3059\u308b ORM\u3001\u6b63\u78ba\u306a WHERE \u53e5\u306e\u306a\u3044\u5e83\u7bc4\u306a\u300cSELECT \u2026 FOR UPDATE\u300d\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u306a\u3069\u3067\u3059\u3002 \u307e\u305f\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\u30ab\u30a6\u30f3\u30bf\uff08\u4f8b\uff1a\u300c\u6b21\u306e\u8acb\u6c42\u66f8\u756a\u53f7\u300d\uff09\u3082\u30db\u30c3\u30c8\u30ed\u30a6\u306e\u7af6\u5408\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002 \u79c1\u306e\u5bfe\u7b56\uff1a\u9ad8\u4fa1\u306a\u691c\u8a3c\u3068 API \u547c\u3073\u51fa\u3057\u3092\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u524d\u306b\u79fb\u52d5\u3057\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u7bc4\u56f2\u3092\u5f71\u97ff\u3092\u53d7\u3051\u308b\u884c\u306e\u8aad\u307f\u53d6\u308a\/\u66f8\u304d\u8fbc\u307f\u306e\u307f\u306b\u524a\u6e1b\u3057\u3001ORM \u3067\u660e\u793a\u7684\u306a\u30ec\u30a4\u30b8\u30fc\/\u30a4\u30fc\u30ac\u30fc\u6226\u7565\u3092\u78ba\u4fdd\u3057\u3001\u300cSELECT *\u300d\u3092\u5b9f\u969b\u306b\u5fc5\u8981\u306a\u5217\u306e\u307f\u306b\u524a\u6e1b\u3057\u307e\u3059\u3002 \u5b9a\u671f\u7684\u306a\u30b8\u30e7\u30d6\uff08Cron\u3001\u30ef\u30fc\u30ab\u30fc\uff09\u306f\u3001\u30ad\u30fc\u3054\u3068\u306e\u30ed\u30c3\u30af\u6226\u7565\uff08\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30cb\u30f3\u30b0\u3084\u9867\u5ba2\u3054\u3068\u306e\u5c02\u7528\u30ed\u30c3\u30af\u306a\u3069\uff09\u3067\u5206\u6563\u3057\u3066\u3001\u8907\u6570\u306e\u30ef\u30fc\u30ab\u30fc\u304c\u540c\u6642\u306b\u540c\u3058\u884c\u3092\u51e6\u7406\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<h2>\u75c7\u72b6\u3092\u8a8d\u8b58\u3057\u6e2c\u5b9a\u3059\u308b<\/h2>\n\n<p>P95 \u304a\u3088\u3073 P99 \u306e\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u76e3\u8996\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30d4\u30fc\u30af\u306f\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3084\u30ed\u30c3\u30af\u30ad\u30e5\u30fc\u3092\u76f4\u63a5\u53cd\u6620\u3057\u3066\u3044\u308b\u304b\u3089\u3067\u3059\u3002 <strong>\u30b7\u30e7\u30fc<\/strong>. SQL Server \u3067\u306f\u3001\u30a8\u30e9\u30fc 1205 \u306f\u660e\u78ba\u306a\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306e\u72a0\u7272\u8005\u3092\u793a\u3057\u3001LCK_M \u5f85\u6a5f\u6642\u9593\u306f\u30ed\u30c3\u30af\u306e\u7af6\u5408\u306e\u5897\u52a0\u3092\u793a\u3057\u307e\u3059\u3002MySQL \u306e\u30b9\u30ed\u30fc\u30af\u30a8\u30ea\u30ed\u30b0\u3068 EXPLAIN \u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u6b20\u843d\u3084\u6700\u9069\u3067\u306f\u306a\u3044\u7d50\u5408\u9806\u5e8f\u3092\u660e\u3089\u304b\u306b\u3057\u307e\u3059\u3002\u30d6\u30ed\u30c3\u30af\u3055\u308c\u305f\u30bb\u30c3\u30b7\u30e7\u30f3\u3001\u5f85\u6a5f\u30b0\u30e9\u30d5\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u30ab\u30a6\u30f3\u30bf\u306e\u76e3\u8996\u306f\u3001\u5fc5\u8981\u306a\u900f\u660e\u6027\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002 \u3053\u308c\u3089\u306e\u6307\u6a19\u3092\u76e3\u8996\u3059\u308b\u3053\u3068\u3067\u3001\u624b\u63a2\u308a\u306e\u5bfe\u5fdc\u3092\u56de\u907f\u3057\u3001\u4e8b\u5f8c\u5bfe\u5fdc\u7684\u306a\u5bfe\u5fdc\u3092\u7701\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <strong>\u6d88\u706b<\/strong>.<\/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\/01\/datenbank-deadlocks-hosting-2947.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u4e88\u9632\uff1a\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30c7\u30b6\u30a4\u30f3\u3068\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/h2>\n\n<p>\u79c1\u306f\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u77ed\u304f\u3001\u539f\u5b50\u7684\u306b\u3001\u30ed\u30c3\u30af\u9806\u5e8f\u3067\u4e00\u8cab\u6027\u3092\u6301\u305f\u305b\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u3046\u3059\u308b\u3053\u3068\u3067\u3001 <strong>\u62b1\u64c1<\/strong> \u5177\u4f53\u7684\u306b\u306f\u3001\u5e38\u306b\u540c\u3058\u9806\u5e8f\u3067\u30c6\u30fc\u30d6\u30eb\u3092\u30ed\u30c3\u30af\u3057\u3001\u30d0\u30c3\u30c1\u30b5\u30a4\u30ba\u3092\u7e2e\u5c0f\u3057\u3001\u9ad8\u4fa1\u306a\u8a08\u7b97\u3092\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u524d\u306b\u914d\u7f6e\u3057\u3066\u3044\u307e\u3059\u3002\u7af6\u5408\u9818\u57df\u3092\u7e2e\u5c0f\u3059\u308b\u305f\u3081\u306b\u3001\u5206\u96e2\u30ec\u30d9\u30eb\u306f\u53ef\u80fd\u306a\u9650\u308a\u4f4e\u304f\u8a2d\u5b9a\u3057\u3001\u307b\u3068\u3093\u3069\u306e\u5834\u5408\u3001SERIALIZABLE \u3067\u306f\u306a\u304f READ COMMITTED \u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u7d50\u5408\u5217\u3068 WHERE \u5217\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u3001\u30b9\u30ad\u30e3\u30f3\u6642\u9593\u3092\u77ed\u7e2e\u3057\u3001\u305d\u308c\u306b\u3088\u308a\u6392\u4ed6\u30ed\u30c3\u30af\u306e\u7d99\u7d9a\u6642\u9593\u3092\u77ed\u7e2e\u3057\u307e\u3059\u3002 WordPress \u3067\u306f\u3001\u63ee\u767a\u6027\u30c7\u30fc\u30bf\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u79fb\u52d5\u3057\u3001\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3044\u307e\u3059\u3002 <a href=\"https:\/\/webhosting.de\/ja\/%e3%83%af%e3%83%bc%e3%83%89%e3%83%97%e3%83%ac%e3%82%b9%e3%81%ae%e3%83%88%e3%83%a9%e3%83%b3%e3%82%b8%e3%82%a7%e3%83%b3%e3%83%88%e3%80%81%e3%83%a9%e3%82%b9%e3%83%88%e3%82%bd%e3%83%bc%e3%82%b9%e3%80%81\/\">WordPress \u30c8\u30e9\u30f3\u30b8\u30a7\u30f3\u30c8<\/a> DB\u304c <strong>\u91dd\u306e\u7a74<\/strong> \u306e\u610f\u601d\u8868\u793a\u3092\u3057\u307e\u3059\u3002<\/p>\n\n<h2>\u30db\u30c3\u30c8\u30b9\u30dd\u30c3\u30c8\u306b\u5bfe\u3059\u308b\u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0<\/h2>\n\n<p>\u30db\u30c3\u30c8\u30ad\u30fc\u306e\u7af6\u5408\u3092\u5206\u6563\u3059\u308b\u3053\u3068\u3067\u7de9\u548c\u3057\u307e\u3059\u3002\u4e2d\u592e\u306e\u30ab\u30a6\u30f3\u30bf\u3067\u306f\u306a\u304f\u3001\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u3054\u3068\u306b\u30b7\u30e3\u30fc\u30c9\u30ab\u30a6\u30f3\u30bf\u3092\u4f7f\u7528\u3057\u3001\u975e\u540c\u671f\u3067\u96c6\u8a08\u3057\u307e\u3059\u3002\u5c11\u6570\u306e\u30da\u30fc\u30b8\u3067\u5358\u8abf\u306b\u5897\u52a0\u3059\u308b\u30ad\u30fc\uff08\u305f\u3068\u3048\u3070\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u672b\u5c3e\u306e IDENTITY\uff09\u306f\u3001\u30da\u30fc\u30b8\u5206\u5272\u3084\u7af6\u5408\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002 \u3053\u306e\u5834\u5408\u306f\u3001\u30e9\u30f3\u30c0\u30e0\u307e\u305f\u306f\u30bf\u30a4\u30e0uuid\u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u3001\u3088\u308a\u5e83\u7bc4\u306a\u5206\u6563\u3001\u307e\u305f\u306f\u9069\u5207\u306a FILLFACTOR \u304c\u6709\u52b9\u3067\u3059\u3002\u30ad\u30e5\u30fc\u306b\u3064\u3044\u3066\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u306a\u3044\u300cSELECT MIN(id) \u2026 FOR UPDATE\u300d\u306f\u907f\u3051\u3001\u5805\u7262\u306a\u30b9\u30c6\u30fc\u30bf\u30b9\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30da\u30a2\uff08status\u3001created_at\uff09\u3092\u4f7f\u7528\u3057\u3001\u5c0f\u3055\u306a\u30d0\u30c3\u30c1\u3067\u4f5c\u696d\u3057\u307e\u3059\u3002 \u8ffd\u52a0\u5c02\u7528\u306e\u30c6\u30fc\u30d6\u30eb\u3067\u306f\u3001\u30b9\u30ad\u30e3\u30f3\u3084\u518d\u7de8\u6210\u306b\u3088\u3063\u3066\u30ed\u30c3\u30af\u306e\u30a8\u30b9\u30ab\u30ec\u30fc\u30b7\u30e7\u30f3\u304c\u767a\u751f\u3057\u306a\u3044\u3088\u3046\u306b\u3001\u5b9a\u671f\u7684\u306a\u30d7\u30eb\u30fc\u30cb\u30f3\u30b0\/\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30cb\u30f3\u30b0\u3092\u8a08\u753b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u6c7a\u5b9a\u306b\u3088\u308a\u3001\u591a\u304f\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u304c\u540c\u6642\u306b\u540c\u3058\u884c\u3084\u30da\u30fc\u30b8\u3092\u8981\u6c42\u3059\u308b\u53ef\u80fd\u6027\u304c\u4f4e\u304f\u306a\u308a\u307e\u3059\u3002.<\/p>\n\n<h2>\u30d5\u30a9\u30fc\u30eb\u30c8\u30c8\u30ec\u30e9\u30f3\u30c8\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af\uff1a\u518d\u8a66\u884c\u3001\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3001\u30d0\u30c3\u30af\u30d7\u30ec\u30c3\u30b7\u30e3\u30fc<\/h2>\n\n<p>\u30ea\u30c8\u30e9\u30a4\u3092\u5b9f\u88c5\u3057\u307e\u3059\u304c\u3001\u30b8\u30c3\u30bf\u30fc\u3068\u4e0a\u9650\u3092\u8a2d\u5b9a\u3057\u3066\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u5f8c\u306b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u904e\u5ea6\u306b\u30ea\u30c8\u30e9\u30a4\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002 <strong>\u7a81\u9032\u3059\u308b<\/strong>. \u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u306f\u30c1\u30a7\u30fc\u30f3\u306b\u6cbf\u3063\u3066\u6bb5\u968e\u7684\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u4e0a\u6d41\u306f\u4e0b\u6d41\u3088\u308a\u3082\u9577\u304f\u8a2d\u5b9a\u3057\u3001\u30a8\u30e9\u30fc\u3092\u5236\u5fa1\u3057\u306a\u304c\u3089\u89e3\u6c7a\u3057\u307e\u3059\u3002\u30d0\u30c3\u30af\u30d7\u30ec\u30c3\u30b7\u30e3\u30fc\u306f\u3001\u30ec\u30fc\u30c8\u5236\u9650\u3001\u30ad\u30e5\u30fc\u5236\u9650\u3001429 \u30ec\u30b9\u30dd\u30f3\u30b9\u306b\u3088\u3063\u3066\u6291\u5236\u3057\u3001\u904e\u8ca0\u8377\u3092\u7de9\u548c\u3057\u307e\u3059\u3002\u518d\u8a66\u884c\u304c\u6709\u52b9\u306b\u306a\u3063\u305f\u5834\u5408\u3001\u51aa\u7b49\u64cd\u4f5c\u306b\u3088\u308a\u91cd\u8907\u66f8\u304d\u8fbc\u307f\u304c\u9632\u6b62\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u898f\u5f8b\u306b\u3088\u308a\u3001\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306f\u30b9\u30c8\u30ec\u30b9\u4e0b\u3067\u3082\u4fe1\u983c\u6027\u3092\u7dad\u6301\u3057\u3001\u7d50\u679c\u7684\u306a<strong>\u640d\u5bb3<\/strong>.<\/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\/01\/datenbankhostingdeadlocks_4827.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\uff1a\u30ea\u30fc\u30c9\u30ec\u30d7\u30ea\u30ab\u3001\u30b7\u30e3\u30fc\u30c7\u30a3\u30f3\u30b0\u3001\u30ad\u30e3\u30c3\u30b7\u30e5<\/h2>\n\n<p>\u79c1\u306f\u3001\u8aad\u8005\u304c\u66f8\u304d\u8fbc\u307f\u8005\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u3001\u30ea\u30fc\u30c9\u30ec\u30d7\u30ea\u30ab\u3067\u30d7\u30e9\u30a4\u30de\u30eaDB\u306e\u8ca0\u8377\u3092\u8efd\u6e1b\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u30d6\u30ed\u30c3\u30af<\/strong>. \u3002\u30b7\u30e3\u30fc\u30c7\u30a3\u30f3\u30b0\u306f\u3001\u30db\u30c3\u30c8\u30ad\u30fc\u304c\u5206\u89e3\u3055\u308c\u3001\u7af6\u5408\u304c\u5206\u6563\u3055\u308c\u308b\u3088\u3046\u306b\u3001\u81ea\u7136\u306a\u30ad\u30fc\u306b\u6cbf\u3063\u3066\u5206\u6563\u3057\u307e\u3059\u3002 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<strong>\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6<\/strong>.<\/p>\n\n<h2>\u30ea\u30fc\u30c9\u4e00\u8cab\u6027\u3068\u30ec\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u9045\u5ef6\u3092\u6b63\u3057\u304f\u7406\u89e3\u3059\u308b<\/h2>\n\n<p>\u30ea\u30fc\u30c9\u30ec\u30d7\u30ea\u30ab\u306f\u30ed\u30c3\u30af\u306e\u8ca0\u8377\u3092\u8efd\u6e1b\u3057\u307e\u3059\u304c\u3001\u65b0\u305f\u306a\u554f\u984c\u3082\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30ec\u30d7\u30ea\u30ab\u30e9\u30b0\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u66f8\u304d\u8fbc\u307f\u306e\u76f4\u5f8c\u306b\u30ec\u30d7\u30ea\u30ab\u304b\u3089\u8aad\u307f\u8fbc\u3080\u3068\u3001\u300c\u66f8\u304d\u8fbc\u307f\u306e\u8aad\u307f\u53d6\u308a\u300d\u306e\u7570\u5e38\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002 \u79c1\u306f\u3001\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306b\u5fdc\u3058\u305f\u8aad\u307f\u53d6\u308a\u30d1\u30b9\uff08\u30d7\u30e9\u30a4\u30de\u30ea\u304b\u3089\u306e\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u306a\u8aad\u307f\u53d6\u308a\u3001\u305d\u308c\u4ee5\u5916\u306f\u30ec\u30d7\u30ea\u30ab\uff09\u3001\u6642\u9593\u30d9\u30fc\u30b9\u306e\u4e00\u8cab\u6027\uff08\u30e9\u30b0\u304c\u3057\u304d\u3044\u5024\u4ee5\u4e0b\u306e\u5834\u5408\u306b\u306e\u307f\u8aad\u307f\u53d6\u308a\uff09\u3001\u307e\u305f\u306f\u66f8\u304d\u8fbc\u307f\u5f8c\u306e\u30b9\u30c6\u30a3\u30c3\u30ad\u30fc\u30bb\u30c3\u30b7\u30e7\u30f3\u306b\u3088\u3063\u3066\u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3057\u3066\u3044\u307e\u3059\u3002 \u91cd\u8981\u306a\u70b9\uff1a\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306f\u4e3b\u306b\u30d7\u30e9\u30a4\u30de\u30ea\u3067\u767a\u751f\u3057\u307e\u3059\u304c\u3001\u30ec\u30d7\u30ea\u30ab\u3078\u306e\u7a4d\u6975\u7684\u306a\u8aad\u307f\u53d6\u308a\u8ca0\u8377\u306f\u3001\u30e9\u30b0\u304c\u30d0\u30c3\u30af\u30d7\u30ec\u30c3\u30b7\u30e3\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3057\u305f\u5834\u5408\u3001\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u5168\u4f53\u3092\u6df7\u4e71\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u79c1\u306f\u30ec\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u9045\u5ef6\u3001\u9069\u7528\u30ad\u30e5\u30fc\u3001\u304a\u3088\u3073\u7af6\u5408\u30ab\u30a6\u30f3\u30bf\u3092\u76e3\u8996\u3057\u3001\u8ca0\u8377\u5206\u6563\u3068\u4e00\u8cab\u6027\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u30bf\u30a4\u30e0\u30ea\u30fc\u306b\u8abf\u6574\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<h2>\u8a3a\u65ad\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\uff1a\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u30b0\u30e9\u30d5\u3092\u8aad\u307f\u53d6\u308a\u3001\u539f\u56e0\u3092\u4fee\u6b63\u3059\u308b<\/h2>\n\n<p>\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u30b0\u30e9\u30d5\u304b\u3089\u59cb\u3081\u3001\u5f71\u97ff\u3092\u53d7\u3051\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u7279\u5b9a\u3057\u3001\u30ed\u30c3\u30af\u306e\u9806\u5e8f\u3092\u8aad\u307f\u53d6\u3063\u3066 <strong>\u539f\u56e0<\/strong> \u5236\u9650\u3059\u308b\u3002\u88ab\u5bb3\u30bb\u30c3\u30b7\u30e7\u30f3\u306f\u3001\u591a\u304f\u306e\u5834\u5408\u3001\u6700\u9577\u306e\u30ed\u30c3\u30af\u6642\u9593\u307e\u305f\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u6b20\u843d\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002MySQL \u3067\u306f\u3001PERFORMANCE_SCHEMA \u3067\u73fe\u5728\u306e\u30ed\u30c3\u30af\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002SQL Server \u3067\u306f\u3001sys.dm_tran_locks \u304a\u3088\u3073 Extended Events \u304c\u6b63\u78ba\u306a\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u30af\u30a8\u30ea\u3092\u66f8\u304d\u63db\u3048\u3001\u9069\u5207\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8a2d\u5b9a\u3057\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u30ed\u30c3\u30af\u9806\u5e8f\u3092\u7d71\u4e00\u3057\u307e\u3059\u3002 \u7c21\u5358\u306a\u8ca0\u8377\u30c6\u30b9\u30c8\u3067\u4fee\u6b63\u3092\u78ba\u8a8d\u3057\u3001\u9577\u3044\u6642\u9593\u3092\u304b\u3051\u305a\u306b\u5f8c\u7d9a\u306e\u554f\u984c\u3092\u767a\u898b\u3057\u307e\u3059\u3002 <strong>\u5f53\u3066\u63a8\u91cf<\/strong> \u306b\u3042\u308b\u3002<\/p>\n\n<h2>\u79c1\u304c\u610f\u56f3\u7684\u306b\u8abf\u6574\u3059\u308b\u8a2d\u5b9a\u30d1\u30e9\u30e1\u30fc\u30bf<\/h2>\n\n<p>\u79c1\u306f\u4fdd\u5b88\u7684\u306a\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u304b\u3089\u59cb\u3081\u3001\u6e2c\u5b9a\u53ef\u80fd\u306a\u52b9\u679c\u306e\u3042\u308b\u3082\u306e\u3060\u3051\u8abf\u6574\u3057\u307e\u3059\u3002MySQL \u3067\u306f\u3001innodb_lock_wait_timeout \u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001\u30d6\u30ed\u30c3\u30af\u3055\u308c\u305f\u30bb\u30c3\u30b7\u30e7\u30f3\u304c\u30ef\u30fc\u30ab\u30fc\u30d7\u30fc\u30eb\u5168\u4f53\u3092\u62d8\u675f\u3059\u308b\u524d\u306b\u5931\u6557\u3059\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002 innodb_deadlock_detect \u306f\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u307e\u307e\u306b\u3057\u3066\u304a\u304d\u307e\u3059\u304c\u3001\u4e26\u5217\u5ea6\u304c\u975e\u5e38\u306b\u9ad8\u3044\u5834\u5408\u3001\u691c\u51fa\u81ea\u4f53\u304c\u30b3\u30b9\u30c8\u9ad8\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u6539\u5584\u3068\u30d0\u30c3\u30c1\u306e\u5c0f\u578b\u5316\u306b\u3088\u3063\u3066\u7af6\u5408\u3092\u6e1b\u3089\u3057\u307e\u3059\u3002\u81ea\u52d5\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u306e\u7af6\u5408\u306f\u3001\u9069\u5207\u306a\u633f\u5165\u30d1\u30bf\u30fc\u30f3\u306b\u3088\u3063\u3066\u7de9\u548c\u3057\u307e\u3059\u3002 SQL Server \u3067\u306f\u3001DEADLOCK_PRIORITY \u3092\u4f7f\u7528\u3057\u3066\u3001\u7af6\u5408\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u91cd\u8981\u5ea6\u306e\u4f4e\u3044\u30b8\u30e7\u30d6\u3092\u6700\u521d\u306b\u72a0\u7272\u306b\u3057\u3001LOCK_TIMEOUT \u3092\u4f7f\u7528\u3057\u3066\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u7121\u9650\u306b\u5f85\u6a5f\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u307e\u305f\u306f\u30af\u30a8\u30ea\u306e\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u306f\u3001\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u30d1\u30b9\u306b\u6cbf\u3063\u3066\u7d71\u4e00\u3057\u3066\u8a2d\u5b9a\u3057\u3001\u30ec\u30a4\u30e4\u30fc\u304c\u300c\u30cf\u30f3\u30b0\u30a2\u30c3\u30d7\u300d\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002 \u307e\u305f\u3001max_connections \u304a\u3088\u3073\u30d7\u30fc\u30eb\u5236\u9650\u306b\u3082\u6ce8\u610f\u3092\u6255\u3063\u3066\u3044\u307e\u3059\u3002\u540c\u6642\u30bb\u30c3\u30b7\u30e7\u30f3\u304c\u591a\u3059\u304e\u308b\u3068\u7af6\u5408\u304c\u5897\u3048\u3001\u30ad\u30e5\u30fc\u304c\u9577\u304f\u306a\u308a\u3001\u5c11\u306a\u3059\u304e\u308b\u3068\u30a2\u30d7\u30ea\u306b\u8f3b\u8f33\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u5fae\u8abf\u6574\u306f\u3001\u5e38\u306b\u300c\u611f\u899a\u300d\u3067\u306f\u306a\u304f\u3001\u30e1\u30c8\u30ea\u30af\u30b9\u3068\u30c8\u30ec\u30fc\u30b9\u306b\u3088\u308b\u30c7\u30fc\u30bf\u306b\u57fa\u3065\u3044\u3066\u884c\u308f\u308c\u307e\u3059\u3002.<\/p>\n\n<h2>\u518d\u73fe\u6027\u3068\u8ca0\u8377\u8a66\u9a13<\/h2>\n\n<p>\u79c1\u306f\u3001\u75c7\u72b6\u3092\u4fee\u6b63\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3092\u518d\u73fe\u53ef\u80fd\u306a\u5f62\u3067\u518d\u73fe\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u306b\u306f\u3001\u540c\u3058\u884c\u3092\u7570\u306a\u308b\u9806\u5e8f\u3067\u66f4\u65b0\u3059\u308b 2 \u3064\u304b\u3089 3 \u3064\u306e\u30bf\u30fc\u30b2\u30c3\u30c8\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u4f5c\u6210\u3057\u3001\u4e26\u5217\u6027\u304c\u9ad8\u307e\u308b\u306b\u3064\u308c\u3066\u305d\u306e\u52d5\u4f5c\u3092\u89b3\u5bdf\u3057\u307e\u3059\u3002MySQL \u3067\u306f SHOW ENGINE INNODB STATUS \u304a\u3088\u3073 PERFORMANCE_SCHEMA \u304c\u5f79\u7acb\u3061\u3001SQL Server \u3067\u306f Extended Events \u3092\u4f7f\u7528\u3057\u3066\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u30b0\u30e9\u30d5\u3092\u8a18\u9332\u3057\u307e\u3059\u3002 \u5408\u6210\u8ca0\u8377\uff08\u4f8b\u3048\u3070\u3001\u8aad\u307f\u53d6\u308a\/\u66f8\u304d\u8fbc\u307f\u306e\u6df7\u5408\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\uff09\u3092\u4f7f\u7528\u3057\u3066\u3001\u4fee\u6b63\u304c P95\/P99 \u307e\u3067\u5b89\u5b9a\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u73fe\u5b9f\u7684\u306a\u30c7\u30fc\u30bf\u5206\u5e03\u3068\u30db\u30c3\u30c8\u30ad\u30fc\u3092\u518d\u73fe\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u7a7a\u306e\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306f\u3001\u5b9f\u969b\u306e\u30ed\u30c3\u30af\u306e\u7af6\u5408\u304c\u3081\u3063\u305f\u306b\u767a\u751f\u3057\u307e\u305b\u3093\u3002\u4fee\u6b63\u304c\u8ca0\u8377\u4e0b\u3067\u6a5f\u80fd\u3057\u3066\u304b\u3089\u521d\u3081\u3066\u3001\u5909\u66f4\u3092\u5c55\u958b\u3057\u3001\u30e1\u30c8\u30ea\u30af\u30b9\u3092\u6ce8\u610f\u6df1\u304f\u76e3\u8996\u3057\u307e\u3059\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/01\/datenbankdeadlockschreibtisch3428.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30d7\u30ed\u30d0\u30a4\u30c0\u306e\u9078\u629e\u3068\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306e\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0<\/h2>\n\n<p>\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306b\u3064\u3044\u3066\u306f\u3001\u5c02\u7528\u306eDB\u30ea\u30bd\u30fc\u30b9\u3001IOPS\u306e\u4fdd\u8a3c\u3001\u304a\u3088\u3073\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306e\u767a\u751f\u983b\u5ea6\u3092\u6e1b\u3089\u3059\u305f\u3081\u306e\u5805\u7262\u306a\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u306b\u6ce8\u610f\u3092\u6255\u3063\u3066\u3044\u307e\u3059\u3002 <strong>\u8d77\u3053\u308b<\/strong>. \u9069\u5207\u306b\u69cb\u6210\u3055\u308c\u305f\u30d7\u30fc\u30eb\u3001\u5805\u7262\u306a\u30b9\u30c8\u30ec\u30fc\u30b8\u3001\u304a\u3088\u3073\u610f\u5473\u306e\u3042\u308b\u30e1\u30c8\u30ea\u30af\u30b9\u3092\u5099\u3048\u305f\u30de\u30cd\u30fc\u30b8\u30c9\u30aa\u30d7\u30b7\u30e7\u30f3\u306b\u3088\u308a\u3001\u591a\u304f\u306e\u4ecb\u5165\u304c\u4e0d\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u81ea\u52d5\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u30ec\u30dd\u30fc\u30c8\u3084\u30af\u30a8\u30ea\u30b9\u30c8\u30a2\u306a\u3069\u306e\u6a5f\u80fd\u306b\u3088\u308a\u3001\u539f\u56e0\u5206\u6790\u304c\u8fc5\u901f\u5316\u3055\u308c\u307e\u3059\u3002 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