{"id":16076,"date":"2017-12-14T09:00:40","date_gmt":"2017-12-14T00:00:40","guid":{"rendered":"http:\/\/www.techscore.com\/blog\/?p=16076"},"modified":"2018-11-14T16:33:42","modified_gmt":"2018-11-14T07:33:42","slug":"postgresql%e3%81%aeio%e3%81%ab%e3%81%be%e3%81%a4%e3%82%8f%e3%82%8b%e3%82%a8%e3%83%88%e3%82%bb%e3%83%88%e3%83%a9","status":"publish","type":"post","link":"https:\/\/www.techscore.com\/blog\/2017\/12\/14\/postgresql%e3%81%aeio%e3%81%ab%e3%81%be%e3%81%a4%e3%82%8f%e3%82%8b%e3%82%a8%e3%83%88%e3%82%bb%e3%83%88%e3%83%a9\/","title":{"rendered":"PostgreSQL\u306eIO\u306b\u307e\u3064\u308f\u308b\u30a8\u30c8\u30bb\u30c8\u30e9"},"content":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\u3002\u5bfa\u5ca1\u3067\u3059\u3002
\n\u3053\u308c\u306f TECHSCORE Advent Calendar 2017<\/a> \u306e14\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002<\/p>\n

PostgreSQL\u306eIO\u554f\u984c\u3092\u8abf\u67fb\u3059\u308b\u6a5f\u4f1a\u304c\u3042\u308a\u3001RDBMS\u306eIO\u554f\u984c\u3092\u53d6\u308a\u5dfb\u304f\u72b6\u6cc1\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u3066\u307f\u307e\u3057\u305f\u3002
\n\u672c\u8a18\u4e8b\u306f\u4e00\u822c\u7684\u306aLinux+PostgreSQL\u74b0\u5883\u3092\u5bfe\u8c61\u3068\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

RDBMS\u3068ACID<\/h2>\n

PostgreSQL\u3092\u306f\u3058\u3081\u3068\u3057\u305f\u591a\u304f\u306eRDBMS\u306f\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u4fe1\u983c\u6027\u3092\u5f37\u304f\u4fdd\u8a3c\u3059\u308b\u30b7\u30b9\u30c6\u30e0\u3067\u3059\u3002
\n\u3053\u306e\u7279\u6027\u306f\u539f\u5b50\u6027(Atomicity) \u4e00\u8cab\u6027(Consistency) \u72ec\u7acb\u6027(Isolation) \u6c38\u7d9a\u6027(Durability) \u306e\u982d\u6587\u5b57\u3092\u53d6\u308aACID\u3068\u547c\u3070\u308c\u3066\u3044\u307e\u3059\u3002
\nRDBMS\u306b\u304a\u3051\u308bACID\u3068\u306f\u3001\u5168\u5229\u7528\u8005\uff08\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\uff09\u304c\u5b9f\u65bd\u3057\u305f\u64cd\u4f5c\uff08\u30af\u30a8\u30ea\uff09\u304c\u3001\u5b9f\u65bd\u3055\u308c\u305f\u9806\u756a\u3067\u5b8c\u4e86\u3059\u308b\u3053\u3068\u304c\u4fdd\u8a3c\uff08\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3001\u30ec\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\uff09\u3055\u308c\u308b\u3053\u3068\u3092\u8868\u3057\u307e\u3059\u3002
\n\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u30ed\u30c3\u30af\u5f85\u3061\u306a\u3069\u3001\u304b\u304b\u308b\u30b3\u30b9\u30c8\u306f\u975e\u5e38\u306b\u5927\u304d\u304f\u3001ACID\u7279\u6027\u3092\u4fdd\u3063\u305f\u307e\u307e\u5206\u6563\u51e6\u7406\u306b\u3088\u308a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u4e0a\u3052\u308b\u306e\u306f\u975e\u5e38\u306b\u56f0\u96e3\u3060\u3068\u8a00\u308f\u308c\u3066\u3044\u307e\u3059\u3002
\n\u203b\u3059\u3053\u3057\u524d\u306bGoogle\u304cCloud Spanner<\/a>\u3092\u767a\u8868\u3057\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u306d\u3002<\/p>\n

\u3053\u3053\u304b\u3089CAP\u5b9a\u7406\u3092\u7d4c\u7531\u3057\u3066BASE\u306b\u306a\u3060\u308c\u8fbc\u3080\u306e\u304c\u5e38\u9053\u3067\u3059\u304c\u3001\u305d\u3053\u306f\u98db\u3070\u3057\u3066RDBMS\u306e\u8a71\u3092\u7d9a\u3051\u307e\u3059\u3002<\/p>\n

PostgreSQL\u306e\u6c38\u7d9a\u5316\u6226\u7565<\/h2>\n

PostgreSQL\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u4fdd\u5b58\u3055\u308c\u305f\u884c\u30c7\u30fc\u30bf\uff08\u30bf\u30d7\u30eb\u3068\u547c\u3070\u308c\u307e\u3059\uff09\u306f8KB\u306e\u30d6\u30ed\u30c3\u30af\u306b\u307e\u3068\u3081\u3066\u9806\u756a\u306b\u30c7\u30a3\u30b9\u30af\u306b\u66f8\u304d\u51fa\u3055\u308c\u307e\u3059\u3002
\nSQL\u3067\u306e\u30c7\u30fc\u30bf\u633f\u5165\u3001\u66f4\u65b0\u3001\u524a\u9664\u306e\u5358\u4f4d\u304c\u884c\u3067\u3042\u308b\u4ee5\u4e0a\u3001\u3053\u306e\u5358\u4f4d\u3067\u306e\u4fdd\u5b58\u306f\u81ea\u7136\u306a\u767a\u60f3\u306b\u601d\u3048\u307e\u3059\u304c\u3001\u30af\u30a8\u30ea\u306b\u3088\u308b\u30b9\u30ad\u30e3\u30f3\u6642\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u304a\u3044\u3066\u3001\u3053\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306f\u591a\u304f\u306e\u5834\u5408\u4e0d\u5229\u306b\u50cd\u304d\u307e\u3059\u3002
\n\u30c7\u30a3\u30b9\u30afIO\u306f\u30d6\u30ed\u30c3\u30af\u5358\u4f4d\u3067\u767a\u884c\u3055\u308c\u308b\u305f\u3081\u3001SELECT col FROM .. \u306a\u3069\u3001\u30af\u30a8\u30ea\u3067\u306f1\u5217\u5206\u306e\u30c7\u30fc\u30bf\u3057\u304b\u5fc5\u8981\u3068\u3057\u306a\u3044\u5834\u5408\u3082\u3001\u5168\u3066\u306e\u5217\u306e\u30c7\u30fc\u30bf\u3092\u30c7\u30a3\u30b9\u30af\u304b\u3089\u53d6\u5f97\u3057\u305f\u5f8c\u306b\u4f59\u5206\u3092\u8aad\u307f\u98db\u3070\u3059\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n

PostgreSQL\u306e\u5834\u5408\u3001MVCC\u3092\u62c5\u4fdd\u3059\u308b\u305f\u3081\u306e\u6226\u7565\u3068\u3057\u3066\u3001UPDATE\u5bfe\u8c61\u306e\u30bf\u30d7\u30eb\u306f\u30b3\u30d4\u30fc\u3055\u308c\u3001INSERT\u3068\u540c\u69d8\u306b\u30c6\u30fc\u30d6\u30eb\u306b\u8ffd\u8a18\u3055\u308c\u308b\u70b9\u306b\u3082\u6c17\u3092\u4ed8\u3051\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\n\u4f8b\u30481\u30d0\u30a4\u30c8\u306eboolean\u578b\u3067\u3082\u3001\u6761\u4ef6\u306a\u3057\u306e\u5168\u884cUPDATE\u306f\u3001\u5168\u884c\u8aad\u307f\u8fbc\u307f+\u5168\u884c\u66f8\u304d\u8fbc\u307f+WAL\u3067IO\u306f\u3048\u3089\u3044\u3053\u3063\u3061\u3083\uff5e\u3001\u3068\u306a\u308a\u307e\u3059\u306e\u3067\u3082\u3046\u5c11\u3057\u52b4\u3063\u3066\u3042\u3052\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u3053\u306e\u3088\u3046\u306b\u3001\u884c\u5358\u4f4d\u3067\u30c7\u30fc\u30bf\u306e\u6c38\u7d9a\u5316\u3092\u884c\u3046\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u884c\u6307\u5411\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n

\u884c\u6307\u5411\u3068\u5217\u6307\u5411<\/h2>\n

\u884c\u6307\u5411\u304c\u3042\u308c\u3070\u5217\u6307\u5411\u3082\u3042\u308b\u308f\u3051\u3067\u3001\u5217\u6307\u5411\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306f\u3001\u6c38\u7d9a\u5316\u6642\u3001\u8907\u6570\u884c\u3092\u5217\u5358\u4f4d\u306b\u4e26\u3079\u306a\u304a\u3057\u305f\u5217\u30d6\u30ed\u30c3\u30af\u3092\u6c38\u7d9a\u5316\u3057\u307e\u3059\u3002
\n\u3053\u308c\u306b\u3088\u308a\u4e00\u90e8\u306e\u5217\u306e\u307f\u53d6\u5f97\u3059\u308b\u5834\u5408\u3082\u7121\u99c4\u306aIO\u3092\u767a\u884c\u3059\u308b\u3053\u3068\u306a\u304f\u8aad\u307f\u8fbc\u307f\u306e\u52b9\u7387\u304c\u4e0a\u304c\u308a\u307e\u3059\u3002
\n\u307e\u305f\u3001\u5217\u5358\u4f4d\u3067\u307e\u3068\u3081\u308b\u3068\u30d6\u30ed\u30c3\u30af\u5185\u306e\u540c\u4e00\u30c7\u30fc\u30bf\u304c\u591a\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u4e0a\u304c\u308a\u3001\u591a\u304f\u306e\u30b1\u30fc\u30b9\u3067\u5727\u7e2e\u304c\u52b9\u679c\u7684\u306b\u50cd\u304d\u307e\u3059\u3002<\/p>\n

\u3057\u304b\u3057\u3001\u5217\u5358\u4f4d\u3067\u306e\u5727\u7e2e\u306b\u3088\u308b\u30e1\u30ea\u30c3\u30c8\u3092\u4eab\u53d7\u3059\u308b\u306b\u306f\u3001\u305d\u308c\u306a\u308a\u306b\u591a\u304f\u306e\u884c\u306e\u5217\u30c7\u30fc\u30bf\u3092\u307e\u3068\u3081\u3066\u304b\u3089\u30c7\u30a3\u30b9\u30af\u306b\u66f8\u304d\u51fa\u3059\u5fc5\u8981\u304c\u3042\u308a\u3001RDBMS\u306e\u3088\u3046\u306b\u884c\u5358\u4f4d\u3067\u30ec\u30b3\u30fc\u30c9\u3092\u64cd\u4f5c\u3057\u3001ACID\u7279\u6027\u3092\u91cd\u8996\u3059\u308b\u30b7\u30b9\u30c6\u30e0\u3067\u5217\u6307\u5411\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u306f\u56f0\u96e3\u3067\u3059\u3002<\/p>\n

\u4eee\u60f3\u5316\u3001\u30af\u30e9\u30a6\u30c9\u5316\u306e\u6ce2<\/h2>\n

\u5927\u6614\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4eee\u60f3\u74b0\u5883\u3067\u52d5\u4f5c\u3055\u305b\u308b\u306a\u3093\u3066\u2026\u2026\u307f\u305f\u3044\u306a\u3053\u3068\u304c\u826f\u304f\u8a00\u308f\u308c\u3066\u3044\u305f\u6c17\u304c\u3057\u307e\u3059\u304c\u3001\u4eca\u306f\u6570\u591a\u306e\u30b5\u30fc\u30d0\u304c\u4eee\u60f3\u74b0\u5883\u3067\u8d77\u52d5\u3055\u308c\u308b\u6642\u4ee3\u3067\u3059\u3002
\n\u8010\u969c\u5bb3\u6027\u3084\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u306e\u9ad8\u3055\u6545\u3001RDBMS\u3082\u4eee\u60f3\u74b0\u5883\u3067\u52d5\u4f5c\u3055\u305b\u308b\u3053\u3068\u304c\u591a\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u3002
\n\u4eee\u60f3\u74b0\u5883\u306e\u8010\u969c\u5bb3\u6027\u3092\u4eab\u53d7\u3059\u308b\u305f\u3081\u306b\u3001\u30c7\u30a3\u30b9\u30af\u3082\u4eee\u60f3\u5316\u3055\u308c\u308b\u3053\u3068\u304c\u6b86\u3069\u3067\u3001iSCSI\u3084Fibre Channel\u306a\u3069\u306eSAN\u306b\u3088\u308a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7d4c\u7531\u3067IO\u8ee2\u9001\u3092\u884c\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u6280\u8853\u306e\u9032\u6b69\u306b\u3088\u308a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6027\u80fd\u304c\u5411\u4e0a\u3057\u305f\u3068\u306f\u3044\u3048\u3001\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u4e21\u9762\u306b\u304a\u3044\u3066\u3001\u7269\u7406\u7684\u306b\u76f4\u7d50\u3055\u308c\u308b\u3001\u8fd1\u5e74\u9032\u5316\u306e\u8457\u3057\u3044SSD\u30fbNVMe\u64c1\u3059\u308b\u9ad8\u901f\u30b9\u30c8\u30ec\u30fc\u30b8\u3068\u6bd4\u8f03\u3059\u308b\u306e\u306f\u7121\u7406\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u66f8\u304d\u8fbc\u307f\u3068\u8aad\u307f\u8fbc\u307f\u3068\u30ad\u30e3\u30c3\u30b7\u30e5<\/h2>\n

RDBMS\u306eIO\u51e6\u7406\u306f\u4e0d\u5229\u306a\u8981\u56e0\u304c\u591a\u304f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u9762\u3067\u554f\u984c\u3068\u306a\u308b\u30b1\u30fc\u30b9\u304c\u591a\u304f\u3042\u308a\u307e\u3059\u3002
\n\u305d\u306e\u969b\u3001\u66f8\u304d\u8fbc\u307f\u6642\u3088\u308a\u3082\u8aad\u307f\u8fbc\u307f\u306e\u30af\u30a8\u30ea\u304c\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3068\u306a\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002
\n\u901a\u5e38\u306e\u30b1\u30fc\u30b9\u3067\u306f\u3001\u66f8\u304d\u8fbc\u307f\u3088\u308a\u3082\u8aad\u307f\u8fbc\u307f\u306e\u65b9\u304c\u3001IO\u5bfe\u8c61\u3068\u306a\u308b\u30c7\u30fc\u30bf\u91cf\u304c\u5727\u5012\u7684\u306b\u591a\u3044\u306e\u304c\u4e3b\u8981\u56e0\u3067\u3059\u304c\u3001\u305d\u308c\u4ee5\u5916\u306b\u3082\u6ce8\u610f\u3059\u3079\u304d\u30dd\u30a4\u30f3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

OS\u306f\u30c7\u30a3\u30b9\u30afIO\u306e\u52b9\u7387\u3092\u4e0a\u3052\u308b\u305f\u3081\u3001\u30e1\u30e2\u30ea\u4e0a\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u5229\u7528\u3057\u3066\u3044\u307e\u3059\u3002
\n\u3053\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u66f8\u304d\u8fbc\u307f\u6642\u306b\u3082\u5229\u7528\u3055\u308c\u3001OS\uff08\u30ab\u30fc\u30cd\u30eb\uff09\u306b\u66f8\u304d\u8fbc\u307f\u3092\u4f9d\u983c\u3057\u305f\u30d7\u30ed\u30bb\u30b9\u306f\u30c7\u30a3\u30b9\u30af\u3078\u306e\u66f8\u304d\u51fa\u3057\u3092\u5f85\u305f\u305a\u306b\u6b21\u306e\u51e6\u7406\u3092\u7d9a\u3051\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\u306e\u3067\u3059\u3002
\n\u51e6\u7406\u7279\u6027\u4e0a\u3001\u8aad\u307f\u8fbc\u307f\u6642\u306f\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u306a\u3044\u3068\u5f8c\u7d9a\u51e6\u7406\u304c\u7d9a\u884c\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u6b86\u3069\u3067\u3001\uff08\u305f\u3068\u3048\u975e\u540c\u671f\u8aad\u307f\u8fbc\u307f\u3092\u884c\u3063\u305f\u3068\u3057\u3066\u3082\uff09\u4f55\u3089\u304b\u306e\u5f85\u3061\u304c\u767a\u751f\u3057\u3001\u51e6\u7406\u52b9\u7387\u304c\u4e0a\u304c\u3089\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002
\n\u76f4\u7d50\u3055\u308c\u305f\u7269\u7406\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u5834\u5408\u3001\u901a\u5e38\u306f\u8aad\u307f\u8fbc\u307f\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u304c\u66f8\u304d\u8fbc\u307f\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3092\u5927\u304d\u304f\u4e0a\u56de\u308b\u70b9\u306f\u3001\u8aad\u307f\u8fbc\u307f\u4e0d\u5229\u3092\u633d\u56de\u3059\u308b\u5927\u304d\u306a\u30dd\u30a4\u30f3\u30c8\u3067\u3057\u305f\u3002
\n\u307e\u305f\u3001\u8fd1\u5e74PostgreSQL\u3067\u306fPararellScan\u306a\u3069\u306e\u5b9f\u88c5\u306b\u3088\u308a\u3001\u8aad\u307f\u8fbc\u307f\u3092\u4e26\u5217\u5316\u3057\u3066\u51e6\u7406\u52b9\u7387\u3092\u4e0a\u3052\u308b\u8a66\u307f\u304c\u7d9a\u3051\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u4e00\u8ee2\u3001IN\u3068OUT\u306e\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u306b\u5dee\u304c\u306a\u3044\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u306b\u306a\u3063\u3066\u304f\u308b\u3068\u3001\u8aad\u307f\u8fbc\u307f\u306e\u51e6\u7406\u306e\u975e\u52b9\u7387\u306f\u5927\u554f\u984c\u306b\u306a\u308a\u5f97\u307e\u3059\u3002
\nIO\u304c\u8a70\u307e\u3063\u3066\u3057\u307e\u3063\u3066\u306f\u8aad\u307f\u8fbc\u307f\u4e26\u5217\u5316\u306e\u52b9\u679c\u3082\u671f\u5f85\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n

PostgreSQL\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u6226\u7565<\/h2>\n

PostgreSQL\u3067\u306f\u81ea\u8eab\u306e\u7ba1\u7406\u4e0b\u306b\u3042\u308bSharedBuffer\u3068\u3001OS\u306e\u7ba1\u7406\u3059\u308bPageCache\u306e\u4e8c\u6bb5\u69cb\u3048\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u69cb\u6210\u3092\u53d6\u308a\u307e\u3059\u3002
\n\u30af\u30a8\u30ea\u5b9f\u884c\u6642\u9593\u306e\u6700\u60aa\u5024\u3092\u77e5\u308a\u305f\u3044\u5834\u5408\u3001\u4e0b\u8a18\u306e\u30b3\u30de\u30f3\u30c9\u3067OS\u306ePageCache\u3092\u30af\u30ea\u30a2\u3057\u305f\u4e0a\u3001<\/p>\n

sudo sh -c \"echo 1 > \/proc\/sys\/vm\/drop_caches\"<\/pre>\n
\u66f4\u306bPostgreSQL\u306e\u518d\u8d77\u52d5\u306a\u3069\u306b\u3088\u308a\u3001SharedBuffer\u3092\u30af\u30ea\u30a2\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\n\u300c\u3042\u308c\u30fc\u3001\u3053\u306e\u30af\u30a8\u30ea\u3055\u3063\u304d\u9045\u304b\u3063\u305f\u306e\u306b\u4eca\u3067\u306f\u901f\u653b\u3067\u8fd4\u3063\u3066\u304f\u308b\u306e\u306f\u306a\u3093\u3067\u3060\u30fc\u300d
\n\u3068\u5606\u304f\u540c\u50da\u3092\u898b\u304b\u3051\u305f\u969b\u306f\u3001\u3053\u3063\u305d\u308a\u6559\u3048\u3066\u3042\u3052\u3066\u308b\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n
\u5f3e\u4e38<\/h2>\n
\u4eca\u56de\u306f\u30af\u30e9\u30a6\u30c9\u6642\u4ee3\u306eRDBMS\u3067\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3068\u306a\u308a\u3084\u3059\u3044\u3001IO\u306b\u95a2\u3057\u3066\u306e\u554f\u984c\u8981\u56e0\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/p>\n
\u5b9f\u306f\u3001\u3053\u308c\u3089\u306e\u554f\u984c\u306b\u306f\u9280\u306e\u5f3e\u4e38\u304c\u5b58\u5728\u3057\u307e\u3059\u3002
\n\u304a\u91d1\u3092\u7a4d\u3093\u3067\u30e1\u30e2\u30ea\u306b\u4e57\u305b\u308b\u3002\u2026\u2026\u304a\u3063\u3068\u3001\u3053\u308c\u3067\u306f\u91d1\u306e\u5f3e\u4e38\u3067\u3059\u306d\u3002<\/p>\n
\u6b21\u56de\u304c\u3042\u308c\u3070\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306e\u4e3b\u5f79\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u3053\u3093\u306b\u3061\u306f\u3002\u5bfa\u5ca1\u3067\u3059\u3002
\n\u3053\u308c\u306f TECHSCORE Advent Calendar 2017 \u306e14\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002<\/p>\n
PostgreSQL\u306eIO\u554f\u984c\u3092\u8abf\u67fb\u3059\u308b\u6a5f\u4f1a\u304c\u3042\u308a\u3001RDBMS\u306eIO\u554f\u984c\u3092\u53d6\u308a\u5dfb\u304f\u72b6\u6cc1\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u3066\u307f\u307e\u3057\u305f\u3002
\u7d9a\u304d\u3092\u8aad\u3080...<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[276,62],"tags":[141],"_links":{"self":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/16076"}],"collection":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/comments?post=16076"}],"version-history":[{"count":53,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/16076\/revisions"}],"predecessor-version":[{"id":16581,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/16076\/revisions\/16581"}],"wp:attachment":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/media?parent=16076"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/categories?post=16076"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/tags?post=16076"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}