{"id":195,"date":"2026-03-09T13:24:20","date_gmt":"2026-03-09T13:24:20","guid":{"rendered":"https:\/\/blog.rebalai.com\/ja\/2026\/03\/09\/postgresql-performance-tuning-what-i-learned-optim\/"},"modified":"2026-03-09T22:00:16","modified_gmt":"2026-03-09T22:00:16","slug":"postgresql-performance-tuning-what-i-learned-optim","status":"publish","type":"post","link":"https:\/\/blog.rebalai.com\/ja\/2026\/03\/09\/postgresql-performance-tuning-what-i-learned-optim\/","title":{"rendered":"PostgreSQL\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0: 10TB\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30af\u30a8\u30ea\u6700\u9069\u5316\u3067\u5b66\u3093\u3060\u3053\u3068"},"content":{"rendered":"

\u53bb\u5e74\u306e\u590f\u3001\u79c1\u304c\u62c5\u5f53\u3057\u3066\u3044\u308bSaaS\u30d7\u30ed\u30c0\u30af\u30c8\u306ePostgreSQL\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c10TB\u3092\u8d85\u3048\u305f\u3002\u305d\u308c\u81ea\u4f53\u306f\u60f3\u5b9a\u5185\u3060\u3063\u305f\u3093\u3060\u3051\u3069\u3001\u305d\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u7a81\u7136\u3044\u304f\u3064\u304b\u306e\u30af\u30a8\u30ea\u304c10\u79d2\u4ee5\u4e0a\u304b\u304b\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3001\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u306e\u30af\u30ec\u30fc\u30e0\u304c\u4e00\u6c17\u306b\u5897\u3048\u305f\u3002\u30c1\u30fc\u30e0\u306f\u79c1\u3092\u542b\u3081\u30664\u4eba\u306e\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u30a8\u30f3\u30b8\u30cb\u30a2\u3002\u5c02\u4efb\u306eDBA\u306f\u3044\u306a\u3044\u3002\u300c\u3068\u308a\u3042\u3048\u305a\u81ea\u5206\u305f\u3061\u3067\u306a\u3093\u3068\u304b\u3059\u308b\u304b\u300d\u3068\u3044\u3046\u3084\u3064\u3060\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u306f\u3001\u305d\u306e2\u30f6\u6708\u9593\u3067\u5b9f\u969b\u306b\u8a66\u3057\u3066\u52b9\u3044\u305f\u3053\u3068\u3001\u5168\u7136\u52b9\u304b\u306a\u304b\u3063\u305f\u3053\u3068\u3001\u305d\u3057\u3066\u300c\u306a\u3093\u3067\u3053\u3093\u306a\u52d5\u304d\u3059\u308b\u3093\u3060\u300d\u3068\u6df1\u591c\u306b\u982d\u3092\u62b1\u3048\u305f\u3053\u3068\u3092\u305d\u306e\u307e\u307e\u66f8\u3044\u305f\u3082\u306e\u3060\u3002PostgreSQL 15.3\u3001AWS RDS on db.r6g.4xlarge\u3001\u8aad\u307f\u53d6\u308a\u591a\u3081\uff08\u66f8\u304d\u8fbc\u307f:\u8aad\u307f\u53d6\u308a = \u7d041:8\uff09\u3068\u3044\u3046\u69cb\u6210\u3002<\/p>\n

\u30af\u30a8\u30ea\u30d7\u30e9\u30f3\u30ca\u30fc\u304c\u660e\u3089\u304b\u306b\u304a\u304b\u3057\u306a\u5224\u65ad\u3092\u3057\u3066\u3044\u305f\u7406\u7531<\/h2>\n

\u6700\u521d\u306b\u5f15\u3063\u304b\u304b\u3063\u305f\u306e\u306f\u3001\u3042\u308b\u96c6\u8a08\u30af\u30a8\u30ea\u3060\u3063\u305f\u3002EXPLAIN ANALYZE\u3067\u898b\u308b\u3068\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u3061\u3083\u3093\u3068\u5b58\u5728\u3057\u3066\u3044\u308b\u306e\u306bSeq Scan\u3092\u9078\u3093\u3067\u3044\u308b\u3002\u300c\u3048\u3001\u306a\u3093\u3067\uff1f\u300d\u3068\u306a\u3063\u3066\u8abf\u3079\u59cb\u3081\u305f\u306e\u304c\u6ce5\u6cbc\u3078\u306e\u5165\u53e3\u3060\u3063\u305f\u3002<\/p>\n

\u539f\u56e0\u306f\u30c6\u30fc\u30d6\u30eb\u7d71\u8a08\u60c5\u5831\u306e\u9673\u8150\u5316\u3060\u3063\u305f\u3002ANALYZE\u3092\u6700\u5f8c\u306b\u5b9f\u884c\u3057\u305f\u306e\u304c3\u9031\u9593\u524d\u3067\u3001\u305d\u306e\u9593\u306b\u30c7\u30fc\u30bf\u304c\u7d0440%\u5897\u52a0\u3057\u3066\u3044\u305f\u3002\u30d7\u30e9\u30f3\u30ca\u30fc\u306f\u53e4\u3044\u7d71\u8a08\u306b\u57fa\u3065\u3044\u3066\u30b3\u30b9\u30c8\u3092\u8a08\u7b97\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30b9\u30ad\u30e3\u30f3\u3088\u308aSeq Scan\u306e\u65b9\u304c\u5b89\u3044\u3068\u3044\u3046\u8aa4\u3063\u305f\u7d50\u8ad6\u3092\u51fa\u3057\u3066\u3044\u305f\u3002<\/p>\n

-- \u307e\u305a\u3053\u308c\u3067\u7d71\u8a08\u306e\u72b6\u614b\u3092\u78ba\u8a8d\u3057\u305f\nSELECT schemaname, tablename, last_analyze, last_autoanalyze, n_live_tup, n_dead_tup\nFROM pg_stat_user_tables\nWHERE n_live_tup > 1000000\nORDER BY last_analyze ASC NULLS FIRST;\n<\/code><\/pre>\n
autovacuum\u306f\u52d5\u3044\u3066\u3044\u305f\u3093\u3060\u3051\u3069\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u8a2d\u5b9a\u3067\u306f\u30c7\u30fc\u30bf\u5897\u52a0\u306e\u30da\u30fc\u30b9\u306b\u8ffd\u3044\u3064\u3051\u3066\u3044\u306a\u304b\u3063\u305f\u3002autovacuum_analyze_scale_factor<\/code>\u304c\u30c7\u30d5\u30a9\u30eb\u30c80.2\u306e\u307e\u307e\u3060\u3063\u305f\u306e\u3067\u3001\u30c6\u30fc\u30d6\u30eb\u306e20%\u304c\u5909\u5316\u3059\u308b\u307e\u3067ANALYZE\u304c\u8d70\u3089\u306a\u3044\u300210\u5104\u884c\u30c6\u30fc\u30d6\u30eb\u3060\u3068\u30012\u5104\u884c\u5909\u308f\u3089\u306a\u3044\u3068\u7d71\u8a08\u304c\u66f4\u65b0\u3055\u308c\u306a\u3044\u8a08\u7b97\u306b\u306a\u308b\u3002<\/p>\n
\u5bfe\u51e6\u3068\u3057\u3066\u307e\u305a\u306f\u624b\u52d5\u3067ANALYZE\u3092\u8d70\u3089\u305b\u305f\u3089\u3001\u554f\u984c\u306e\u30af\u30a8\u30ea\u304c3.2\u79d2\u304b\u30890.08\u79d2\u306b\u843d\u3061\u305f\u3002\u6b63\u76f4\u3001\u3053\u3093\u306a\u306b\u5358\u7d14\u306a\u8a71\u3060\u3068\u306f\u601d\u3063\u3066\u3044\u306a\u304b\u3063\u305f\u3002\u3082\u3063\u3068\u6df1\u3044\u3068\u3053\u308d\u306b\u539f\u56e0\u304c\u3042\u308b\u3068\u601d\u3044\u8fbc\u3093\u3067\u3044\u305f\u306e\u3067\u3001\u62cd\u5b50\u629c\u3051\u3059\u308b\u6c17\u6301\u3061\u534a\u5206\u3001\u300c\u3082\u3063\u3068\u65e9\u304f\u6c17\u3065\u3051\u3088\u300d\u3068\u3044\u3046\u81ea\u5df1\u5acc\u60aa\u534a\u5206\u3002<\/p>\n
\u305d\u306e\u5f8c\u3001\u5927\u304d\u3044\u30c6\u30fc\u30d6\u30eb\u306b\u306f\u500b\u5225\u306bautovacuum_analyze_scale_factor = 0.01<\/code>\u3092\u8a2d\u5b9a\u3057\u305f\u3002\u30c6\u30fc\u30d6\u30eb\u30ec\u30d9\u30eb\u306estorage\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u4e0a\u66f8\u304d\u3067\u304d\u308b\u3002<\/p>\n
pg_stat_statements<\/code>\u3067\u72af\u4eba\u3092\u898b\u3064\u3051\u308b\u306e\u306b3\u65e5\u304b\u304b\u3063\u305f<\/h2>\n
\u7d71\u8a08\u60c5\u5831\u306e\u554f\u984c\u306f\u89e3\u6c7a\u3057\u305f\u3051\u3069\u3001\u305d\u308c\u3060\u3051\u3058\u3083\u306a\u304b\u3063\u305f\u3002\u5168\u4f53\u7684\u306a\u30af\u30a8\u30ea\u30ec\u30a4\u30c6\u30f3\u30b7\u306f\u6539\u5584\u3055\u308c\u305f\u3082\u306e\u306e\u3001\u30d4\u30fc\u30af\u6642\u9593\u5e2f\u306ep99\u304c\u4f9d\u7136\u3068\u3057\u3066\u9ad8\u3044\u3002<\/p>\n
pg_stat_statements<\/code>\u306f\u6700\u521d\u304b\u3089\u6709\u52b9\u306b\u3057\u3066\u3044\u305f\u3093\u3060\u3051\u3069\u3001\u3061\u3083\u3093\u3068\u6d3b\u7528\u3067\u304d\u3066\u3044\u306a\u304b\u3063\u305f\u3002\u898b\u308b\u3079\u304d\u6570\u5b57\u304c\u591a\u3059\u304e\u3066\u4f55\u306b\u6ce8\u76ee\u3059\u308c\u3070\u3044\u3044\u304b\u5206\u304b\u3089\u306a\u304b\u3063\u305f\u30023\u65e5\u9593\u3044\u308d\u3093\u306a\u89d2\u5ea6\u304b\u3089\u898b\u305f\u7d50\u679c\u3001\u81ea\u5206\u306e\u4e2d\u3067\u300c\u307e\u305a\u3053\u308c\u3092\u898b\u308b\u300d\u3068\u3044\u3046\u9806\u756a\u304c\u3067\u304d\u305f\u3002<\/p>\n
-- \u7dcf\u5b9f\u884c\u6642\u9593\u304c\u591a\u3044\u9806\u306b\u4e26\u3079\u308b\uff08\u547c\u3073\u51fa\u3057\u983b\u5ea6\u3067\u306f\u306a\u304f\uff09\nSELECT\n  query,\n  calls,\n  round(total_exec_time::numeric, 2) AS total_ms,\n  round(mean_exec_time::numeric, 2) AS mean_ms,\n  round(stddev_exec_time::numeric, 2) AS stddev_ms,\n  rows\nFROM pg_stat_statements\nWHERE calls > 100\nORDER BY total_exec_time DESC\nLIMIT 20;\n<\/code><\/pre>\n
mean_exec_time<\/code>\u3060\u3051\u3058\u3083\u306a\u304f\u3066stddev_exec_time<\/code>\u3082\u898b\u308b\u306e\u304c\u91cd\u8981\u3060\u3063\u305f\u3002\u5e73\u5747\u306f\u4f4e\u3044\u306e\u306b\u6a19\u6e96\u504f\u5dee\u304c\u7570\u5e38\u306b\u5927\u304d\u3044\u30af\u30a8\u30ea\u304c2\u672c\u3042\u3063\u3066\u3001\u305d\u3053\u306b\u554f\u984c\u304c\u96a0\u308c\u3066\u3044\u305f\u3002\u6761\u4ef6\u306b\u3088\u3063\u3066\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u3063\u305f\u308a\u4f7f\u308f\u306a\u304b\u3063\u305f\u308a\u3059\u308b\u30bf\u30a4\u30d7\u306e\u30af\u30a8\u30ea\u3067\u3001\u300c\u30c7\u30fc\u30bf\u6b21\u7b2c\u3067\u5b9f\u884c\u8a08\u753b\u304c\u5909\u308f\u308b\u300d\u3084\u3064\u3060\u3063\u305f\u3002<\/p>\n
\u4e00\u756a\u9a5a\u3044\u305f\u306e\u306f\u3001\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u7528\u306eOFFSET\u30af\u30a8\u30ea\u304c\u554f\u984c\u306e\u6839\u6e90\u3060\u3063\u305f\u3053\u3068\u3002OFFSET 50000<\/code>\u3068\u304b\u306b\u306a\u308b\u3068\u3001PostgreSQL\u306f\u6700\u521d\u306e50000\u884c\u3092\u30b9\u30ad\u30e3\u30f3\u3057\u3066\u6368\u3066\u308b\u3068\u3044\u3046\u52d5\u304d\u3092\u3059\u308b\u3002\u3053\u308c\u3001\u305a\u3063\u3068\u77e5\u8b58\u3068\u3057\u3066\u306f\u77e5\u3063\u3066\u3044\u305f\u3093\u3060\u3051\u3069\u3001\u5b9f\u969b\u306b\u81ea\u5206\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u3053\u3053\u307e\u3067\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u306b\u306a\u308b\u3068\u306f\u601d\u3063\u3066\u3044\u306a\u304b\u3063\u305f\u3002<\/p>\n
\u30ab\u30fc\u30bd\u30eb\u30d9\u30fc\u30b9\u306e\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\uff08keyset pagination\uff09\u306b\u5207\u308a\u66ff\u3048\u3066\u3001\u305d\u306e\u30af\u30a8\u30ea\u306f\u89e3\u6c7a\u3002\u305f\u3060\u3057\u65e2\u5b58\u306eAPI\u306e\u4ed5\u69d8\u5909\u66f4\u304c\u5fc5\u8981\u306b\u306a\u3063\u305f\u306e\u3067\u3001\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u30c1\u30fc\u30e0\u3068\u306e\u8abf\u6574\u306b1\u9031\u9593\u304b\u304b\u3063\u305f\u3002\u3053\u3046\u3044\u3046\u300c\u6280\u8853\u7684\u306b\u306f\u660e\u3089\u304b\u306a\u7b54\u3048\u304c\u3042\u308b\u306e\u306b\u3001\u8abf\u6574\u30b3\u30b9\u30c8\u304c\u9ad8\u3044\u300d\u3068\u3044\u3046\u72b6\u6cc1\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3042\u308b\u3042\u308b\u3060\u3068\u601d\u3046\u3002<\/p>\n
\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u8a2d\u8a08\u3092\u4e00\u304b\u3089\u898b\u76f4\u3057\u305f\u3089\u534a\u5206\u4ee5\u4e0a\u306f\u4e0d\u8981\u3060\u3063\u305f<\/h2>\n
\u3053\u3053\u304c\u672c\u5f53\u306b\u6642\u9593\u304c\u304b\u304b\u3063\u305f\u90e8\u5206\u3060\u2014\u2014\u3068\u3044\u3046\u304b\u3001\u4eca\u3067\u3082\u307e\u3060\u5b8c\u5168\u306b\u7d42\u308f\u3063\u3066\u3044\u306a\u3044\u3002<\/p>\n
\u65e2\u5b58\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c130\u672c\u3042\u3063\u305f\u30024\u5e74\u5206\u306e\u300c\u3068\u308a\u3042\u3048\u305a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u8cbc\u308c\u3070\u901f\u304f\u306a\u308b\u300d\u306e\u7a4d\u307f\u91cd\u306d\u3060\u3002\u307e\u305a\u672a\u4f7f\u7528\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6d17\u3044\u51fa\u3057\u305f\u3002<\/p>\n
SELECT\n  schemaname,\n  tablename,\n  indexname,\n  idx_scan,\n  pg_size_pretty(pg_relation_size(indexrelid)) AS index_size\nFROM pg_stat_user_indexes\nWHERE idx_scan = 0\n  AND indexname NOT LIKE '%pkey%'\n  AND indexname NOT LIKE '%unique%'\nORDER BY pg_relation_size(indexrelid) DESC;\n<\/code><\/pre>\n
\u7d71\u8a08\u3092\u30ea\u30bb\u30c3\u30c8\u3057\u3066\u304b\u30892\u9031\u9593\u5f8c\u306b\u78ba\u8a8d\u3057\u305f\u3089\u3001idx_scan = 0<\/code>\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c41\u672c\u3042\u3063\u305f\u3002\u5408\u8a08\u3067\u7d04180GB\u306e\u30b9\u30c8\u30ec\u30fc\u30b8\u3002\u305d\u3057\u3066\u66f8\u304d\u8fbc\u307f\u306e\u305f\u3073\u306b\u3053\u306e41\u672c\u304c\u66f4\u65b0\u3055\u308c\u3066\u3044\u305f\u3002<\/p>\n
\u5168\u90e8\u3092\u4e00\u6c17\u306b\u6d88\u3059\u306e\u306f\u6016\u304b\u3063\u305f\u306e\u3067\uff08\u3061\u3083\u3093\u3068\u7406\u7531\u304c\u3042\u3063\u3066\u4f5c\u3063\u305f\u3084\u3064\u304c\u6df7\u3058\u3063\u3066\u3044\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u3057\uff09\u3001\u6708\u306b10\u672c\u305a\u3064\u6d88\u3059\u3053\u3068\u306b\u3057\u305f\u30022\u30f6\u6708\u306720\u672c\u6d88\u3057\u305f\u6bb5\u968e\u3067\u66f8\u304d\u8fbc\u307f\u306e\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u304c\u4f53\u611f\u3067\u5206\u304b\u308b\u304f\u3089\u3044\u4e0a\u304c\u3063\u305f\u3002<\/p>\n
\u9006\u306b\u3001\u8db3\u308a\u3066\u3044\u306a\u304b\u3063\u305f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3082\u3042\u3063\u305f\u3002\u8907\u5408\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u5217\u306e\u9806\u5e8f\u304c\u9593\u9055\u3063\u3066\u3044\u305f\u30b1\u30fc\u30b9\u304c4\u4ef6\u3002WHERE user_id = ? AND created_at > ?<\/code>\u3068\u3044\u3046\u30af\u30a8\u30ea\u306b\u5bfe\u3057\u3066(created_at, user_id)<\/code>\u3068\u3044\u3046\u9806\u5e8f\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8cbc\u3063\u3066\u3044\u305f\u3002\u7b49\u5024\u6761\u4ef6\u306e\u5217\u3092\u5148\u306b\u3059\u308b\u306e\u304c\u539f\u5247\u3060\u3051\u3069\u3001\u3053\u308c\u304c\u9006\u306b\u306a\u3063\u3066\u3044\u305f\u3002<\/p>\n
\u6b63\u76f4\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u5217\u9806\u5e8f\u306f\u300c\u5206\u304b\u3063\u3066\u3044\u308b\u300d\u3064\u3082\u308a\u3060\u3063\u305f\u306e\u306b\u5b9f\u969b\u306b\u306f\u9593\u9055\u3048\u3066\u3044\u305f\u3002\u3061\u3083\u3093\u3068\u673a\u4e0a\u3067\u8003\u3048\u308b\u3068\u5f53\u305f\u308a\u524d\u306e\u3053\u3068\u304c\u3001\u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u306e\u6d41\u308c\u306e\u4e2d\u3060\u3068\u898b\u843d\u3068\u3059\u3002\u3053\u308c\u306f\u30c1\u30fc\u30e0\u306e\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u306b\u8ffd\u52a0\u3057\u305f\u3002<\/p>\n
\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30cb\u30f3\u30b0\u3067\u89e3\u6c7a\u3057\u305f\u3053\u3068\u3001\u305d\u3046\u3067\u306a\u304b\u3063\u305f\u3053\u3068<\/h2>\n
10TB\u306e\u3046\u3061\u6700\u5927\u306e\u30c6\u30fc\u30d6\u30eb\u306f\u5358\u4f53\u30673.8TB\u3002\u30a4\u30d9\u30f3\u30c8\u30ed\u30b0\u7cfb\u306e\u30c7\u30fc\u30bf\u3067\u3001created_at<\/code>\u306b\u3088\u308b\u7bc4\u56f2\u691c\u7d22\u304c\u591a\u3044\u3002\u300c\u30ec\u30f3\u30b8\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30cb\u30f3\u30b0\u3092\u5165\u308c\u308c\u3070\u901f\u304f\u306a\u308b\u306f\u305a\u300d\u3068\u601d\u3063\u3066\u3001\u3053\u308c\u304c\u4e00\u756a\u6642\u9593\u3092\u6eb6\u304b\u3057\u305f\u4f5c\u696d\u3060\u3063\u305f\u3002<\/p>\n
\u7d50\u8ad6\u304b\u3089\u8a00\u3046\u3068\u3001\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30cb\u30f3\u30b0\u3067\u6539\u5584\u3057\u305f\u306e\u306f\u53e4\u3044\u30c7\u30fc\u30bf\u306e\u524a\u9664\u3068\u30a2\u30fc\u30ab\u30a4\u30d6<\/strong>\u3060\u3051\u3060\u3063\u305f\u3002\u30af\u30a8\u30ea\u901f\u5ea6\u3078\u306e\u5f71\u97ff\u306f\u3001\u6b63\u76f4\u671f\u5f85\u3057\u3066\u3044\u305f\u307b\u3069\u3067\u306f\u306a\u304b\u3063\u305f\u3002<\/p>\n
\u7406\u7531\u3092\u8abf\u3079\u3066\u3044\u304f\u3068\u3001\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u30d7\u30eb\u30fc\u30cb\u30f3\u30b0\u304c\u6a5f\u80fd\u3059\u308b\u305f\u3081\u306b\u306fWHERE<\/code>\u53e5\u306b\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u30ad\u30fc\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u3063\u3066\u3001\u79c1\u305f\u3061\u306e\u30af\u30a8\u30ea\u306e\u534a\u5206\u306fuser_id\u3084status_id\u3067\u691c\u7d22\u3057\u3066\u3044\u305f\u3002\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u30ad\u30fc\uff08created_at\uff09\u3092\u4f7f\u3063\u3066\u3044\u306a\u3044\u30af\u30a8\u30ea\u306f\u5168\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u3092\u30b9\u30ad\u30e3\u30f3\u3057\u3066\u3057\u307e\u3046\u3002\u3053\u308c\u3001\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u8aad\u3081\u3070\u5206\u304b\u308b\u8a71\u306a\u3093\u3060\u3051\u3069\u3001\u5b9f\u969b\u306b\u3084\u3063\u3066\u307f\u308b\u307e\u3067\u7518\u304f\u898b\u3066\u3044\u305f\u3002<\/p>\n
\u79fb\u884c\u4f5c\u696d\u3082\u5927\u5909\u3060\u3063\u305f\u3002pg_partman\uff08PostgreSQL 10+\u5bfe\u5fdc\u306e\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u7ba1\u7406\u62e1\u5f35\uff09\u3092\u4f7f\u3063\u305f\u3051\u3069\u3001\u672c\u756a\u306b\u9069\u7528\u3059\u308b\u305f\u3081\u306e\u30c0\u30a6\u30f3\u30bf\u30a4\u30e0\u30bc\u30ed\u79fb\u884c\u306e\u624b\u9806\u3092\u7d44\u3080\u306e\u306b\u76f8\u5f53\u306a\u6642\u9593\u304c\u304b\u304b\u3063\u305f\u3002pg_repack<\/code>\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u30ed\u30c3\u30af\u3092\u6700\u5c0f\u5316\u3057\u306a\u304c\u3089\u3084\u3063\u305f\u3093\u3060\u3051\u3069\u3001\u91d1\u66dc\u306e\u5348\u5f8c\u306b\u672c\u756a\u306b\u6295\u5165\u3057\u305f\u3089\u4e88\u60f3\u5916\u306e\u30ed\u30c3\u30af\u7af6\u5408\u304c\u8d77\u304d\u3066\u30d2\u30e4\u30ea\u3068\u3057\u305f\u3002\u4f5c\u696d\u306f\u65e5\u66dc\u306e\u6df1\u591c\u306b\u3084\u308b\u3079\u304d\u3060\u3063\u305f\u3002\u6b21\u56de\u3078\u306e\u6559\u8a13\u3002<\/p>\n
\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30cb\u30f3\u30b0\u304c\u672c\u5f53\u306b\u52b9\u3044\u305f\u306e\u306f\u6708\u6b21\u3067\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u3092DETACH\u3057\u3066S3\u306b\u30a2\u30fc\u30ab\u30a4\u30d6\u3059\u308b\u904b\u7528\u3092\u7d44\u3093\u3060\u3068\u304d\u30023\u30f6\u6708\u3067\u7d04800GB\u306e\u30c7\u30fc\u30bf\u3092\u30a2\u30fc\u30ab\u30a4\u30d6\u3067\u304d\u3066\u3001\u305d\u306e\u5f8c\u306e\u30af\u30a8\u30ea\u901f\u5ea6\u306f\u3080\u3057\u308d\u3053\u3063\u3061\u306e\u52b9\u679c\u304c\u5927\u304d\u304b\u3063\u305f\u3002<\/p>\n
\u8a2d\u5b9a\u5024\u3067\u5b9f\u969b\u306b\u52b9\u679c\u304c\u3042\u3063\u305f\u3082\u306e<\/h2>\n
postgresql.conf\u306e\u8abf\u6574\u306f\u6700\u5f8c\u306b\u3084\u3063\u305f\u3002\u300c\u307e\u305a\u30af\u30a8\u30ea\u3068\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u76f4\u3057\u3066\u304b\u3089\u8a2d\u5b9a\u3092\u89e6\u308b\u300d\u3068\u3044\u3046\u9806\u5e8f\u306f\u6b63\u3057\u304b\u3063\u305f\u3068\u601d\u3046\u3002\u8a2d\u5b9a\u3067\u3054\u307e\u304b\u3057\u3066\u3082\u6839\u672c\u539f\u56e0\u306f\u5909\u308f\u3089\u306a\u3044\u3002<\/p>\n
\u305f\u3060\u3001\u3044\u304f\u3064\u304b\u306f\u660e\u78ba\u306b\u52b9\u3044\u305f\u3002<\/p>\n
work_mem<\/code>\u306f128MB\u304b\u3089512MB\u306b\u4e0a\u3052\u305f\u3002\u8907\u96d1\u306a\u30bd\u30fc\u30c8\u3084\u30cf\u30c3\u30b7\u30e5\u7d50\u5408\u304c\u30c7\u30a3\u30b9\u30af\u306b\u30b9\u30d4\u30eb\u3059\u308b\u306e\u3092\u6e1b\u3089\u3059\u305f\u3081\u3002\u305f\u3060\u3057\u3053\u308c\u3001\u63a5\u7d9a\u6570\u00d7work_mem\u304c\u30e1\u30e2\u30ea\u306b\u4e57\u308b\u306e\u3067\u96d1\u306b\u4e0a\u3052\u308b\u3068\u5371\u306a\u3044\u3002\u79c1\u305f\u3061\u306fPgBouncer\u3067\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u30d7\u30fc\u30ea\u30f3\u30b0\u3057\u3066\u3044\u3066\u3001\u5b9f\u969b\u306e\u540c\u6642\u30af\u30a8\u30ea\u6570\u304c\u628a\u63e1\u3067\u304d\u3066\u3044\u305f\u304b\u3089\u4e0a\u3052\u3089\u308c\u305f\u3002\u63a5\u7d9a\u6570\u306e\u628a\u63e1\u306a\u3057\u306bwork_mem<\/code>\u3092\u89e6\u308b\u306e\u306f\u672c\u5f53\u306b\u3084\u3081\u305f\u65b9\u304c\u3044\u3044\u3002<\/p>\n
effective_cache_size<\/code>\u306fRAM\u306e75%\u306b\u8a2d\u5b9a\u3057\u305f\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u306f4GB\uff09\u3002\u3053\u308c\u306f\u30d7\u30e9\u30f3\u30ca\u30fc\u3078\u306e\u30d2\u30f3\u30c8\u3067\u3042\u3063\u3066\u5b9f\u969b\u306b\u30e1\u30e2\u30ea\u3092\u78ba\u4fdd\u3059\u308b\u308f\u3051\u3058\u3083\u306a\u3044\u3051\u3069\u3001\u30d7\u30e9\u30f3\u30ca\u30fc\u306e\u5224\u65ad\u304c\u6539\u5584\u3055\u308c\u305f\u3002<\/p>\n
random_page_cost<\/code>\u306fSSD\u306a\u306e\u30674.0\u304b\u30891.1\u306b\u4e0b\u3052\u305f\u3002HDD\u3092\u524d\u63d0\u3068\u3057\u305f4.0\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306fSSD\u74b0\u5883\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30b9\u30ad\u30e3\u30f3\u304c\u904e\u5c0f\u8a55\u4fa1\u3055\u308c\u308b\u539f\u56e0\u306b\u306a\u308b\u3002\u3053\u308c\u306fRDS\u306e\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3067\u3082\u63a8\u5968\u3055\u308c\u3066\u3044\u308b\u5909\u66f4\u306a\u3093\u3060\u3051\u3069\u3001\u306a\u305c\u304b\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u307e\u307e\u306b\u306a\u3063\u3066\u3044\u305f\u3002<\/p>\n
\u3042\u3068\u3001parallel_tuple_cost<\/code>\u3068max_parallel_workers_per_gather<\/code>\u306e\u8abf\u6574\u3067\u5927\u304d\u3044\u30af\u30a8\u30ea\u306e\u30d1\u30e9\u30ec\u30eb\u30af\u30a8\u30ea\u304c\u52b9\u304f\u3088\u3046\u306b\u306a\u3063\u305f\u3002\u6b63\u76f4\u3001\u3053\u3053\u306f\u8a66\u884c\u932f\u8aa4\u3067\u8ffd\u3044\u8fbc\u3093\u3060\u306e\u3067\u30d9\u30b9\u30c8\u306a\u5024\u304b\u3069\u3046\u304b\u5206\u304b\u3089\u306a\u3044\u3002\u79c1\u305f\u3061\u306e\u74b0\u5883\u3067\u306fmax_parallel_workers_per_gather = 4<\/code>\u304c\u52b9\u679c\u7684\u3060\u3063\u305f\u3051\u3069\u3001\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306b\u3088\u3063\u3066\u5168\u7136\u9055\u3046\u3068\u601d\u3046\u3002<\/p>\n
\n
2\u30f6\u6708\u9593\u306e\u4f5c\u696d\u5168\u4f53\u3092\u632f\u308a\u8fd4\u308b\u3068\u3001\u52b9\u679c\u304c\u9ad8\u304b\u3063\u305f\u9806\u306b\u4e26\u3079\u308b\u3068\u3053\u3046\u306a\u308b: \u7d71\u8a08\u60c5\u5831\u306e\u7ba1\u7406\u3092\u6b63\u3057\u304f\u3059\u308b \u2192 \u4e0d\u8981\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u524a\u9664\u3059\u308b \u2192 \u30af\u30a8\u30ea\u305d\u306e\u3082\u306e\u3092\u76f4\u3059 \u2192 \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u8a2d\u8a08\u3092\u898b\u76f4\u3059 \u2192 \u8a2d\u5b9a\u5024\u3092\u8abf\u6574\u3059\u308b<\/strong>\u3002\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30cb\u30f3\u30b0\u306f\u300c\u30af\u30a8\u30ea\u901f\u5ea6\u300d\u3067\u306f\u306a\u304f\u300c\u30c7\u30fc\u30bf\u7ba1\u7406\u300d\u306e\u554f\u984c\u3068\u3057\u3066\u4f4d\u7f6e\u3065\u3051\u305f\u65b9\u304c\u3044\u3044\u3001\u3068\u3044\u3046\u306e\u304c\u4eca\u306e\u81ea\u5206\u306e\u8003\u3048\u3060\u3002<\/p>\n
\u4e00\u3064\u3060\u3051\u672c\u5f53\u306e\u3053\u3068\u3092\u8a00\u3046\u3068\u3001\u4e00\u756a\u52b9\u679c\u304c\u3042\u3063\u305f\u306e\u306f\u300cEXPLAIN ANALYZE\u3092\u3061\u3083\u3093\u3068\u8aad\u3080\u6642\u9593\u3092\u78ba\u4fdd\u3057\u305f\u300d\u3053\u3068\u3060\u3063\u305f\u3002\u65e5\u3005\u306e\u958b\u767a\u30bf\u30b9\u30af\u306b\u8ffd\u308f\u308c\u3066\u3044\u308b\u3068\u30b9\u30ad\u30c3\u30d7\u3057\u304c\u3061\u306a\u4f5c\u696d\u3060\u3051\u3069\u3001\u3053\u3053\u306b\u6295\u8cc7\u3057\u305f\u6642\u9593\u306f\u78ba\u5b9f\u306b\u56de\u53ce\u3067\u304d\u305f\u3002pgMustard<\/a>\u3068\u3044\u3046EXPLAIN ANALYZE\u306e\u30d3\u30b8\u30e5\u30a2\u30e9\u30a4\u30b6\u30fc\u3082\u9014\u4e2d\u304b\u3089\u4f7f\u3044\u59cb\u3081\u3066\u3001\u3053\u308c\u306f\u30c1\u30fc\u30e0\u306e\u5168\u54e1\u306b\u3068\u3063\u3066\u8aad\u307f\u3084\u3059\u304f\u3066\u826f\u304b\u3063\u305f\u3002<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
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