{"id":6164,"date":"2022-05-13T16:07:04","date_gmt":"2022-05-13T07:07:04","guid":{"rendered":"https:\/\/www.climb.co.jp\/blog_dbmoto\/?p=6164"},"modified":"2023-06-09T15:38:44","modified_gmt":"2023-06-09T06:38:44","slug":"mysql%e3%82%92%e6%9c%80%e9%81%a9%e5%8c%96%e3%81%99%e3%82%8b%e3%81%9f%e3%82%81%e3%81%ae10%e3%81%ae%e7%a7%98%e8%a8%a3","status":"publish","type":"post","link":"https:\/\/www.climb.co.jp\/blog_dbmoto\/archives\/6164","title":{"rendered":"MySQL\u3092\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u306e10\u306e\u79d8\u8a23"},"content":{"rendered":"\n

MySQL\u306f\u3001\u591a\u304f\u306e\u91cd\u8981\u306a\u30d3\u30b8\u30cd\u30b9\u30fb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30c7\u30fc\u30bf\u30fb\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3068\u3057\u3066\u4eba\u6c17\u3092\u96c6\u3081\u7d9a\u3051\u3066\u3044\u307e\u3059\u3002\u6700\u3082\u5e83\u304f\u5229\u7528\u3055\u308c\u3066\u3044\u308b\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u3042\u308bMySQL\u306f\u3001\u591a\u304f\u306e\u30aa\u30f3\u30d7\u30ec\u30df\u30b9\u304a\u3088\u3073\u30af\u30e9\u30a6\u30c9\u30d9\u30fc\u30b9\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b5\u30fc\u30d3\u30b9\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002MySQL\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002MySQL\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30fb\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306f\u591a\u304f\u306e\u8981\u56e0\u306b\u5de6\u53f3\u3055\u308c\u307e\u3059\u304c\u3001\u30e6\u30fc\u30b6\u306f\u5e38\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u5fae\u8abf\u6574\u3057\u3066\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u65b9\u6cd5\u3092\u63a2\u3057\u6c42\u3081\u3066\u3044\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001MySQL\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u306e\u57fa\u672c\u7684\u306a\u65b9\u6cd5\u3068\u3001\u3088\u308a\u6280\u8853\u7684\u306a\u65b9\u6cd5\u3092\u7d39\u4ecb<\/span>\u3057\u307e\u3059\u3002<\/p>\n

\"\"<\/a><\/p>\n

\u5341\u5206\u306a\u30b5\u30fc\u30d0\u30ea\u30bd\u30fc\u30b9\u306e\u78ba\u4fdd<\/strong><\/h3>\n

MySQL\u306e\u3088\u3046\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b5\u30fc\u30d0\u306f\u30014\u3064\u306e\u57fa\u672c\u7684\u306a\u30b5\u30fc\u30d0\u30ea\u30bd\u30fc\u30b9\u3092\u5fc5\u8981\u3068\u3057\u307e\u3059\u3002CPU\u3001\u30e1\u30e2\u30ea\u3001\u30b9\u30c8\u30ec\u30fc\u30b8\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5e2f\u57df\u5e45\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u3046\u3061\u3001\u30e1\u30e2\u30ea\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u6700\u3082\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002MySQL \u306f\u30e1\u30e2\u30ea\u3092\u4f7f\u7528\u3057\u3066\u30af\u30a8\u30ea\u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3001\u4f4e\u901f\u306a\u30b9\u30c8\u30ec\u30fc\u30b8 I\/O \u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u6027\u3092\u4f4e\u6e1b\u3057\u307e\u3059\u3002Linux \u306e top \u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30b5\u30fc\u30d0\u306e CPU \u3068\u30e1\u30e2\u30ea\u306e\u4f7f\u7528\u7387\u3092\u7c21\u5358\u306b\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u00a0<\/p>\n

SSD\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u6d3b\u7528<\/strong><\/h3>\n

\u53ef\u80fd\u306a\u9650\u308a\u9ad8\u901f\u306a\u30b9\u30c8\u30ec\u30fc\u30b8\u30b7\u30b9\u30c6\u30e0\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u304c\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30ec\u30d9\u30eb\u3092\u5411\u4e0a\u3055\u305b\u308b\u65e9\u9053\u3067\u3059\u3002\u73fe\u5728\u3001MySQL\u306e\u30b9\u30c8\u30ec\u30fc\u30b8\u306bHDD\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u3001SSD\u306b\u79fb\u884c\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002SSD \u306f HDD \u3088\u308a\u3082\u306f\u308b\u304b\u306b\u9ad8\u901f\u3067\u3059\u3002\u307e\u305f\u3001\u4fe1\u983c\u6027\u3082\u9ad8\u304f\u3001\u6d88\u8cbb\u96fb\u529b\u3082\u5c11\u306a\u304f\u306a\u3063\u3066\u3044\u307e\u3059\u30027,200 RPM\u306eHDD\u306f\u7d04150MB\/s\u306e\u8ee2\u9001\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3092\u63d0\u4f9b\u3057\u307e\u3059\u304c\u3001SATA III SSD\u63a5\u7d9a\u306f\u7d04550MB\/s\u306e\u8aad\u307f\u53d6\u308a\u901f\u5ea6\u3068520MB\/s\u306e\u66f8\u304d\u8fbc\u307f\u901f\u5ea6\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u305f\u3060\u3057SSD\u306e\u4fa1\u683c\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n

Linux\u306eSwappiness\u8a2d\u5b9a\u3092\u8abf\u6574\u3059\u308b<\/strong><\/h3>\n

Linux\u3067MySQL\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u5834\u5408\u3001Linux\u306eSwappiness\u8a2d\u5b9a\u3092\u6700\u9069\u5316\u3059\u308b\u3053\u3068\u3067\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Swappiness\u306e\u5024\u306f\u3001\u30ab\u30fc\u30cd\u30eb\u304c\u30e1\u30e2\u30ea\u30da\u30fc\u30b8\u3092\u30b9\u30ef\u30c3\u30d7\u30a2\u30a6\u30c8\u3059\u308b\u80fd\u529b\u3092\u5236\u5fa1\u3057\u307e\u3059\u3002\u5341\u5206\u306aRAM\u3092\u6301\u3064\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b5\u30fc\u30d0\u3067\u306f\u3001\u3053\u306e\u5024\u306f\u53ef\u80fd\u306a\u9650\u308a\u4f4e\u304f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u5024\u306f60\u3067\u3059\u3002\u3088\u308a\u826f\u3044\u9078\u629e\u306f\u3001\u6700\u5c0f\u9650\u306e\u30b9\u30ef\u30c3\u30d4\u30f3\u30b0\u3092\u53ef\u80fd\u306b\u3059\u308b\u5024\u3067\u3042\u308b 1 \u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002Linux Swappiness\u306e\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u306b\u306f\u3001\/etc\/sysctl. conf\u30d5\u30a1\u30a4\u30eb\u3092\u7ba1\u7406\u8005\u30e6\u30fc\u30b6\u3067\u958b\u304d\u3001vm.swappiness = 1\u3068\u3044\u3046\u884c\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n

\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u6700\u9069\u5316<\/strong><\/h3>\n

\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u4f5c\u6210\u30df\u30b9\u306f\u3001MySQL\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u539f\u56e0\u3068\u3057\u3066\u3088\u304f\u77e5\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u306a\u3044\u5834\u5408\u3001MySQL\u306f\u5fc5\u8981\u306a\u884c\u3092\u63a2\u3059\u305f\u3081\u306b\u30c6\u30fc\u30d6\u30eb\u5168\u4f53\u3092\u30b9\u30ad\u30e3\u30f3\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u305a\u3001\u3053\u308c\u306f\u4f4e\u901f\u3067\u3001I\/O\u96c6\u4e2d\u7684\u306a\u64cd\u4f5c\u3068\u306a\u308a\u307e\u3059\u3002\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u591a\u3051\u308c\u3070\u591a\u3044\u307b\u3069\u3001\u95a2\u9023\u3059\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u66f4\u65b0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u66f8\u304d\u8fbc\u307f\u304c\u9045\u304f\u306a\u308b\u3053\u3068\u3092\u899a\u3048\u3066\u304a\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002EXPLAIN\u6587\u3001log_queries_not_using_indexes \u69cb\u6210\u8a2d\u5b9a\u3001\u307e\u305f\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6027\u80fd\u76e3\u8996\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u96a0\u308c\u305f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u767a\u898b\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n

\u30d0\u30c3\u30d5\u30a1\u30d7\u30fc\u30eb\u306e\u9069\u5207\u306a\u30b5\u30a4\u30ba\u8a2d\u5b9a<\/strong><\/h3>\n

\u30d0\u30c3\u30d5\u30a1\u30d7\u30fc\u30eb\u306f\u3001\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u308b\u30c7\u30fc\u30bf\u3092\u5e38\u306b\u30c7\u30a3\u30b9\u30af\u306b\u79fb\u52d5\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u30e1\u30e2\u30ea\u5185\u306e\u30d0\u30c3\u30d5\u30a1\u30d7\u30fc\u30eb\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001MySQL\u306f\u7e70\u308a\u8fd4\u3057\u30af\u30a8\u30ea\u3055\u308c\u308b\u30c7\u30fc\u30bf\u306b\u5bfe\u3057\u3066\u306f\u308b\u304b\u306b\u901f\u3044\u5fdc\u7b54\u6642\u9593\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4e00\u822c\u7684\u306a\u7d4c\u9a13\u5247\u3068\u3057\u3066\u3001\u30b7\u30b9\u30c6\u30e0\u30e1\u30e2\u30ea\u306e\u7d0480%\u3092\u30d0\u30c3\u30d5\u30a1\u30d7\u30fc\u30eb\u306b\u5272\u308a\u5f53\u3066\u307e\u3059\u3002\u4f8b\u3048\u3070\u30018GB RAM\u306e\u5834\u5408\u306f6GB\u300132GB RAM\u306e\u5834\u5408\u306f24GB\u3001128GB RAM\u306e\u5834\u5408\u306f100GB\u3068\u306a\u308a\u307e\u3059\u3002MySQL\u306e\u30d0\u30c3\u30d5\u30a1\u30d7\u30fc\u30eb\u30b5\u30a4\u30ba\u306f\u3001\u901a\u5e38 \/etc\/mysql\/my.cnf \u306b\u3042\u308bMySQL\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u5024 innodb_buffer_pool_size \u3092\u7de8\u96c6\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u8abf\u6574\u3067\u304d\u307e\u3059\u3002<\/p>\n

REDO\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u30b5\u30a4\u30ba\u3092\u6700\u9069\u5316\u3059\u308b<\/strong><\/h3>\n

REDO\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u30b5\u30a4\u30ba\u3092\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e48MB\u304b\u3089\u5927\u304d\u304f\u3059\u308b\u3068\u3001\u66f8\u304d\u8fbc\u307f\u64cd\u4f5c\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u30b5\u30a4\u30ba\u3092\u3088\u308a\u6b63\u78ba\u306b\u8a08\u7b97\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u7c21\u5358\u306a\u7d4c\u9a13\u5247\u3067\u306f\u3001\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u30b5\u30a4\u30ba\u3092\u30d0\u30c3\u30d5\u30a1\u30d7\u30fc\u30eb\u3068\u540c\u3058\u30b5\u30a4\u30ba\u306b\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u30b5\u30a4\u30ba\u306f\u3001\/etc\/mysql\/my.cnf \u306b\u3042\u308b MySQL \u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3067 innodb_log_file_size \u8a2d\u5b9a\u3092\u69cb\u6210\u3059\u308b\u3053\u3068\u3067\u6700\u9069\u5316\u3067\u304d\u307e\u3059\u3002<\/p>\n

SELECT * \u306e\u4f7f\u7528\u3092\u907f\u3051\u308b<\/strong><\/h3>\n

SELECT * \u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u5bfe\u8c61\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u3059\u3079\u3066\u306e\u30ab\u30e9\u30e0\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u3001\u4e0d\u5fc5\u8981\u306a I\/O \u3084\u30e1\u30e2\u30ea\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5e2f\u57df\u5e45\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u4e0d\u8981\u306a\u30ab\u30e9\u30e0\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u3055\u3089\u306a\u308b\u8ca0\u8377\u3092\u4e0e\u3048\u3001\u7279\u5b9a\u306e\u30af\u30a8\u30ea\u3084\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u306e\u901f\u5ea6\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u539f\u56e0\u3068\u306a\u308a\u307e\u3059\u3002SELECT * \u3092\u4f7f\u7528\u3059\u308b\u4ee3\u308f\u308a\u306b\u3001SELECT \u53e5\u3067\u5b9f\u969b\u306b\u5fc5\u8981\u306a\u30ab\u30e9\u30e0\u3092\u6307\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5fc5\u8981\u306a\u30c7\u30fc\u30bf\u306e\u307f\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u3067\u3001MySQL \u30af\u30a8\u30ea\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u306e\u4f7f\u7528\u7387\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u5148\u982d\u306e\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3092\u542b\u3080 LIKE \u30a8\u30af\u30b9\u30d7\u30ec\u30c3\u30b7\u30e7\u30f3\u3092\u907f\u3051\u308b<\/strong><\/h3>\n

\u3057\u304b\u3057\u3001MySQL\u306f\u30af\u30a8\u30ea\u306b\u5148\u982d\u306e\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u304c\u3042\u308b\u5834\u5408\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002\u4f8b\u3048\u3070\u3001\u6b21\u306e\u30af\u30a8\u30ea\u306fstudents\u30c6\u30fc\u30d6\u30eb\u306elast_name\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4ed8\u3051\u3066\u3082\u3001MySQL\u306f\u30d5\u30eb\u30c6\u30fc\u30d6\u30eb\u30b9\u30ad\u30e3\u30f3\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\u300cstudents\u300d\u30c6\u30fc\u30d6\u30eb \u306e\u300clast_name\u300d\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3057\u305f\u5834\u5408\uff1a SELECT * FROM students WHERE last_name LIKE ‘%son’<\/p>\n

EXPLAIN\u3092\u6d3b\u7528\u3059\u308b<\/strong><\/h3>\n

EXPLAIN \u306f\u3001MySQL \u30af\u30a8\u30ea\u3092\u7406\u89e3\u3057\u6700\u9069\u5316\u3059\u308b\u306e\u306b\u5f79\u7acb\u3064\u30c4\u30fc\u30eb\u3067\u3059\u3002EXPLAIN \u3092\u5229\u7528\u3059\u308b\u306b\u306f\u3001\u30af\u30a8\u30ea\u306e\u5148\u982d\u306b EXPLAIN \u5f0f\u3092\u8ffd\u52a0\u3059\u308b\u3060\u3051\u3067\u3059\u3002EXPLAIN \u306f\u30af\u30a8\u30ea\u3092\u8aad\u307f\u8fbc\u3093\u3067\u691c\u8a3c\u3057\u3001\u30af\u30a8\u30ea\u5185\u306e\u5404\u30c6\u30fc\u30d6\u30eb\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092 1 \u884c\u305a\u3064\u51fa\u529b\u3057\u307e\u3059\u3002EXPLAIN\u306f\u3001\u51e6\u7406\u3055\u308c\u305f\u884c\u6570\u3001\u4f7f\u7528\u53ef\u80fd\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3001\u5b9f\u969b\u306b\u9078\u629e\u3055\u308c\u305f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306a\u3069\u306e\u30af\u30a8\u30ea\u30fc\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002EXPLAIN\u306f\u6b21\u306e\u3088\u3046\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002EXPLAIN SELECT last_name, first_name FROM students.<\/p>\n

\"\"<\/a>
\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306e\u76e3\u8996<\/strong><\/h3>\n

MySQL \u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u30fb\u7dad\u6301\u3059\u308b\u6700\u5584\u306e\u65b9\u6cd5\u306e\u3072\u3068\u3064\u306f\u3001\u5b9a\u671f\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u76e3\u8996\u3092\u884c\u3046\u3053\u3068\u3067\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30fb\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u76e3\u8996\u306b\u3088\u308a\u3001CPU\u3001\u30e1\u30e2\u30ea\u3001I\/O\u306e\u4f7f\u7528\u7387\u3001IO\u30db\u30c3\u30c8\u30b9\u30dd\u30c3\u30c8\u3001\u5f85\u6a5f\u7d71\u8a08\u3060\u3051\u3067\u306a\u304f\u3001\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u304c\u5fc5\u8981\u306a\u6700\u3082\u9045\u3044\u30af\u30a8\u30ea\u3084\u6700\u3082\u30b3\u30b9\u30c8\u306e\u304b\u304b\u308b\u30af\u30a8\u30ea\u3092\u660e\u3089\u304b\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5b9a\u671f\u7684\u306a\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u306b\u3088\u308a\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30d9\u30fc\u30b9\u30e9\u30a4\u30f3\u3092\u4f5c\u6210\u3057\u3001\u9577\u671f\u7684\u306a\u30c8\u30ec\u30f3\u30c9\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u78ba\u8a8d\u3057\u3001\u7570\u5e38\u3092\u8fc5\u901f\u306b\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3084\u8a2d\u5b9a\u306e\u5909\u66f4\u304c\u52b9\u679c\u7684\u3067\u3042\u3063\u305f\u304b\u3069\u3046\u304b\u3092\u8abf\u3079\u308b\u306e\u306b\u3082\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n

\u305d\u308c\u306b\u306fDatabase Performance Analyzer(DPA)<\/a>\u3068Database Performance Monitor(DPM)<\/a> \u3092\u691c\u8a0e\u304f\u3060\u3055\u3044\u3002<\/span><\/p>\n

\"\"<\/a><\/p>\n

\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"

MySQL\u306f\u3001\u591a\u304f\u306e\u91cd\u8981\u306a\u30d3\u30b8\u30cd\u30b9\u30fb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30c7\u30fc\u30bf\u30fb\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3068\u3057\u3066\u4eba\u6c17\u3092\u96c6\u3081\u7d9a\u3051\u3066\u3044\u307e\u3059\u3002\u6700\u3082\u5e83\u304f\u5229\u7528\u3055\u308c\u3066\u3044\u308b\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u3042\u308bMySQL\u306f\u3001\u591a\u304f\u306e\u30aa\u30f3\u30d7\u30ec\u30df\u30b9\u304a\u3088\u3073\u30af\u30e9\u30a6\u30c9\u30d9\u30fc\u30b9\u306e\u30a2\u30d7 … \u7d9a\u304d\u3092\u8aad\u3080 →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[399,191,304],"tags":[73,147,148,391,436],"class_list":["post-6164","post","type-post","status-publish","format-standard","hentry","category-database-performance-monitor-dpm","category-database","category-dpa","tag-mysql","tag-dpa","tag-148","tag-dpm","tag-436"],"_links":{"self":[{"href":"https:\/\/www.climb.co.jp\/blog_dbmoto\/wp-json\/wp\/v2\/posts\/6164","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.climb.co.jp\/blog_dbmoto\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.climb.co.jp\/blog_dbmoto\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.climb.co.jp\/blog_dbmoto\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.climb.co.jp\/blog_dbmoto\/wp-json\/wp\/v2\/comments?post=6164"}],"version-history":[{"count":7,"href":"https:\/\/www.climb.co.jp\/blog_dbmoto\/wp-json\/wp\/v2\/posts\/6164\/revisions"}],"predecessor-version":[{"id":6455,"href":"https:\/\/www.climb.co.jp\/blog_dbmoto\/wp-json\/wp\/v2\/posts\/6164\/revisions\/6455"}],"wp:attachment":[{"href":"https:\/\/www.climb.co.jp\/blog_dbmoto\/wp-json\/wp\/v2\/media?parent=6164"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.climb.co.jp\/blog_dbmoto\/wp-json\/wp\/v2\/categories?post=6164"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.climb.co.jp\/blog_dbmoto\/wp-json\/wp\/v2\/tags?post=6164"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}