{"id":130119,"date":"2025-07-30T11:41:04","date_gmt":"2025-07-30T02:41:04","guid":{"rendered":"https:\/\/softantenna.com\/blog\/?p=130119"},"modified":"2025-07-30T11:41:04","modified_gmt":"2025-07-30T02:41:04","slug":"postgresql-slower","status":"publish","type":"post","link":"https:\/\/softantenna.com\/blog\/postgresql-slower\/","title":{"rendered":"PostgreSQL\u309242,000\u500d\u9045\u304f\u3059\u308b\u7a76\u6975\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u30ac\u30a4\u30c9"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/softantenna.com\/blog\/wp-content\/uploads\/2025\/07\/pexels-tima-miroshnichenko-5380664.jpg\" alt=\"\" width=\"1280\" height=\"853\" class=\"aligncenter size-full wp-image-130120\" \/><\/p>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3068\u805e\u304f\u3068\u3001\u8ab0\u3082\u304c\u300c\u901f\u304f\u3059\u308b\u300d\u3053\u3068\u3092\u601d\u3044\u6d6e\u304b\u3079\u307e\u3059\u3002\u3057\u304b\u3057Jacob Jackson\u6c0f\u306f\u9006\u306b\u3001\u300c\u610f\u56f3\u7684\u306b\u6fc0\u9045\u306b\u3059\u308b\u300d\u3053\u3068\u306b\u6311\u6226\u3057\u305f\u30d6\u30ed\u30b0\u8a18\u4e8b\u300c<a href=\"https:\/\/byteofdev.com\/posts\/making-postgres-slow\/\">Making Postgres 42,000x slower because I am unemployed<\/a>\u300d\u3092\u516c\u958b\u3057\u3066\u6ce8\u76ee\u3092\u96c6\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u540c\u6c0f\u306f\u3001PostgreSQL\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb<code>postgresql.conf<\/code>\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u3067\u3001TPS\u30927082\u304b\u3089\u308f\u305a\u304b0.17\u307e\u3067\u843d\u3068\u3059(\u306a\u3093\u306842,000\u500d\u9045\u304f)\u3053\u3068\u306b\u6210\u529f\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p class=\"is-style-icon_info\">TPS(Transactions Per Second)\u306f1\u79d2\u3042\u305f\u308a\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u6570\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3084\u30b7\u30b9\u30c6\u30e0\u306e\u51e6\u7406\u6027\u80fd\u3092\u6e2c\u308b\u6307\u6a19\u3068\u3057\u3066\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n<p>\u5b9f\u9a13\u306f\u3001Postgres 19devel\u3001\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u306f\u300cBenchBase TPC-C(\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u6027\u80fd\u8a55\u4fa1\u306b\u4f7f\u308f\u308c\u308b\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u30c4\u30fc\u30eb\u3068\u3001\u305d\u306e\u4e2d\u3067\u4f7f\u308f\u308c\u308b\u4ee3\u8868\u7684\u306a\u30ef\u30fc\u30af\u30ed\u30fc\u30c9)\u300d\u3092\u7528\u3044\u3001Ryzen 7950x + 32GB RAM + SSD\u3092\u642d\u8f09\u3057\u305fLinux\u30de\u30b7\u30f3\u4e0a\u3067\u884c\u308f\u308c\u307e\u3057\u305f\u3002<\/p>\n<h2>\u9045\u304f\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af\u5927\u5168<\/h2>\n<p>\u540c\u6c0f\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3055\u307e\u3056\u307e\u306a\u65b9\u6cd5\u3067PostgreSQL\u3092\u9045\u304f\u3059\u308b\u3053\u3068\u306b\u6210\u529f\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li>\n<p><span><strong>\u30ad\u30e3\u30c3\u30b7\u30e5\u524a\u6e1b<\/strong>\uff1a<code>shared_buffers<\/code>\u3092\u6975\u5c0f\uff088MB\u21922MB\uff09\u306b\u8a2d\u5b9a\u3057\u3001\u30c7\u30a3\u30b9\u30afI\/O\u3092\u5f37\u5236<\/span><\/p>\n<\/li>\n<li>\n<p><span><strong>Autovacuum\u904e\u5270\u5316<\/strong>\uff1a1\u4ef6\u306e\u633f\u5165\u3067vacuum\u304c\u8d70\u308b\u3088\u3046\u306b\u3057\u3001\u5e38\u306b\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u4f5c\u696d\u3092\u5b9f\u884c<\/span><\/p>\n<\/li>\n<li>\n<p><span><strong>\u30ed\u30b0\u751f\u6210\u3068\u7d71\u8a08\u53ce\u96c6\u306e\u5f37\u5316<\/strong>\uff1a\u7121\u99c4\u306a\u30ed\u30b0\u3092\u5927\u91cf\u306b\u751f\u6210\u3001\u7d71\u8a08\u60c5\u5831\u66f4\u65b0\u3067\u6027\u80fd\u3092\u524a\u308b<\/span><\/p>\n<\/li>\n<li>\n<p><span><strong>WAL\u8a2d\u5b9a\u306e\u904e\u5270\u5316<\/strong>\uff1a\u66f8\u304d\u8fbc\u307f\u9045\u5ef6\u30fb\u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c8\u983b\u5ea6\u306e\u904e\u5270\u5f37\u5316\u3067I\/O\u3092\u60aa\u5316<\/span><\/p>\n<\/li>\n<li>\n<p><span><strong>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u7121\u52b9\u5316<\/strong>\uff1a<code>random_page_cost<\/code>\u7b49\u306e\u5024\u3092\u6975\u7aef\u5316\u3057\u3066\u30af\u30a8\u30ea\u30d7\u30e9\u30f3\u304b\u3089\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5229\u7528\u3092\u9664\u5916<\/span><\/p>\n<\/li>\n<li>\n<p><span><strong>I\/O\u30b9\u30ec\u30c3\u30c9\u5236\u9650<\/strong>\uff1aPostgres 18\u4ee5\u964d\u306e<code>io_method=worker<\/code>\u3068<code>io_workers=1<\/code>\u3067I\/O\u30921\u30b9\u30ec\u30c3\u30c9\u306b\u5236\u9650<\/span><\/p>\n<\/li>\n<\/ul>\n<pre>\r\nshared_buffers = 8MB\r\nautovacuum_vacuum_insert_threshold = 1\r\nautovacuum_vacuum_threshold = 0\r\nautovacuum_vacuum_scale_factor = 0\r\nautovacuum_vacuum_max_threshold = 1\r\nautovacuum_naptime = 1\r\nvacuum_cost_limit = 10000\r\nvacuum_cost_page_dirty = 0\r\nvacuum_cost_page_hit = 0\r\nvacuum_cost_page_miss = 0\r\nautovacuum_analyze_threshold = 0\r\nautovacuum_analyze_scale_factor = 0\r\nmaintenance_work_mem = 128kB\r\nlog_autovacuum_min_duration = 0\r\nlogging_collector = on\r\nlog_destination = stderr,jsonlog\r\nwal_writer_flush_after = 0\r\nwal_writer_delay = 1\r\nmin_wal_size = 32MB\r\nmax_wal_size = 32MB\r\ncheckpoint_timeout = 30\r\ncheckpoint_flush_after = 1\r\nwal_sync_method = open_datasync\r\nwal_level = logical\r\nwal_log_hints = on\r\nsummarize_wal = on\r\ntrack_wal_io_timing = on\r\ncheckpoint_completion_target = 0\r\nrandom_page_cost = 1e300\r\ncpu_index_tuple_cost = 1e300\r\nio_method = worker\r\nio_workers = 1\r\n<\/pre>\n<p>\u3053\u306e\u7d50\u679c\u3001\u521d\u671f\u72b6\u614b\u306f7082 TPS\u3060\u3063\u305f\u306e\u306b\u5bfe\u3057\u3001\u7d040.17 TPS\u306842,000\u500d\u9045\u304f\u306a\u308b\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306b\u6210\u529f\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u540c\u6c0f\u306f\u5931\u696d\u4e2d\u3067\u6687\u3060\u3063\u305f\u304b\u3089\u3084\u3063\u305f\u3068\u52d5\u6a5f\u3092\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u304c\u3001Postgres\u306e\u3088\u3046\u306aDB\u3067\u306f\u3001\u8a2d\u5b9a\u6b21\u7b2c\u3067\u6027\u80fd\u304c\u5287\u7684\u306b\u5909\u308f\u308b\u3053\u3068\u3092\u53ef\u8996\u5316\u3067\u304d\u308b\u8208\u5473\u6df1\u3044\u5b9f\u9a13\u3060\u3068\u3044\u3048\u305d\u3046\u3067\u3059\u3002<\/p>\n<p><a href=\"https:\/\/news.ycombinator.com\/item?id=44704736\">Hacker News<\/a>\u3067\u3082\u3053\u306e\u8a18\u4e8b\u306b\u95a2\u3059\u308b\u8b70\u8ad6\u304c\u884c\u308f\u308c\u3066\u304a\u308a\u3001\u300c\u3053\u3053\u307e\u3067\u9045\u304f\u3067\u304d\u308b\u3068\u306f\u601d\u308f\u306a\u304b\u3063\u305f\u300d\u3068\u3044\u3046\u9a5a\u304d\u306e\u58f0\u3084\u3001PostgreSQL\u306e\u67d4\u8edf\u6027\u3068\u5805\u7262\u6027\u306b\u611f\u5fc3\u3059\u308b\u30b3\u30e1\u30f3\u30c8\u304c\u5bc4\u305b\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u5b9f\u9a13\u306e\u518d\u73fe\u6027\u304c\u9ad8\u304f\u3001\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u304c\u516c\u958b\u3055\u308c\u3066\u3044\u308b\u70b9\u3082\u597d\u8a55\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3068\u805e\u304f\u3068\u3001\u8ab0\u3082\u304c\u300c\u901f\u304f\u3059\u308b\u300d\u3053\u3068\u3092\u601d\u3044\u6d6e\u304b\u3079\u307e\u3059\u3002\u3057\u304b\u3057Jacob Jackson\u6c0f\u306f\u9006\u306b\u3001\u300c\u610f\u56f3\u7684\u306b\u6fc0\u9045\u306b\u3059\u308b\u300d\u3053\u3068\u306b\u6311\u6226\u3057\u305f\u30d6\u30ed\u30b0\u8a18\u4e8b\u300cMaking Postgres 42,0 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":130120,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[75],"tags":[335],"class_list":["post-130119","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-software","tag-postgresql"],"_links":{"self":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts\/130119","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/comments?post=130119"}],"version-history":[{"count":0,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts\/130119\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/media\/130120"}],"wp:attachment":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/media?parent=130119"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/categories?post=130119"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/tags?post=130119"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}