{"id":8893,"date":"2021-11-26T17:07:28","date_gmt":"2021-11-26T08:07:28","guid":{"rendered":"https:\/\/www.ecomottblog.com\/?p=8893"},"modified":"2021-11-26T17:07:28","modified_gmt":"2021-11-26T08:07:28","slug":"postgresql-%e3%81%9f%e3%81%a0%e3%81%aevacuum%e3%81%a7%e3%82%82os%e3%81%ab%e9%a0%98%e5%9f%9f%e3%82%92%e8%bf%94%e5%8d%b4%e3%81%99%e3%82%8b%e4%ba%8b%e3%81%8c%e6%9c%89%e3%82%8b","status":"publish","type":"post","link":"https:\/\/test.ecomottblog.com\/?p=8893","title":{"rendered":"Postgresql \u305f\u3060\u306eVacuum\u3067\u3082OS\u306b\u9818\u57df\u3092\u8fd4\u5374\u3059\u308b\u4e8b\u304c\u6709\u308b"},"content":{"rendered":"

MBL\u958b\u767a\u90e8 N\u3067\u3059\u3002<\/p>\n

\u6700\u8fd1\u3001Postgresql\u3092\u904b\u7528\u3057\u3066\u3044\u3066\u6c17\u306b\u306a\u3063\u305f\u6240\u3092\u8abf\u3079\u3066\u307f\u307e\u3057\u305f\u3002
\n\u3069\u3093\u306a\u4e8b\u304b\u3068\u8a00\u3044\u307e\u3059\u3068\u300110GB\u7a0b\u5ea6\u3042\u308b\u30c6\u30fc\u30d6\u30eb\u306e\u30c7\u30fc\u30bf\u3092\u5927\u91cf\u306b\u524a\u9664\u3057\u305f\u969b\u306bVacuum\u3092Full\u30aa\u30d7\u30b7\u30e7\u30f3\u4ed8\u304d\u3067\u884c\u3063\u3066\u3044\u306a\u3044\u306e\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u30c6\u30fc\u30d6\u30eb\u30b5\u30a4\u30ba\u304c\u7e2e\u5c0f\u3057\u3001OS\u306e\u30c7\u30a3\u30b9\u30af\u7a7a\u304d\u5bb9\u91cf\u3082\u5897\u3048\u308b\u3068\u3044\u3046\u3053\u3068\u304c\u4e8c\u56de\u3042\u308a\u3001\u901a\u5e38vacuum\u3067\u306fOS\u306b\u9818\u57df\u306e\u8fd4\u5374\u306f\u884c\u308f\u308c\u306a\u3044\u3068\u601d\u3063\u3066\u3044\u305f\u306e\u3067\u4e00\u5ea6\u76ee\u306f\u898b\u9593\u9055\u3044\u304b\u306a\u3068\u601d\u3063\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n

\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a>\u3092\u898b\u3066\u307f\u308b\u30689\u7cfb\u306eVacuum\u304b\u3089\u3053\u306e\u3088\u3046\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\uff08FULL\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\uff09\u901a\u5e38\u306eVACUUM\u306f\u3001\u5358\u306b\u9818\u57df\u3092\u56de\u53ce\u3057\u3001\u305d\u3053\u3092\u518d\u5229\u7528\u53ef\u80fd\u306a\u72b6\u614b\u306b\u5909\u66f4\u3057\u307e\u3059\u3002 \u3053\u306e\u5f62\u5f0f\u306e\u30b3\u30de\u30f3\u30c9\u3067\u306f\u6392\u4ed6\u7684\u30ed\u30c3\u30af\u304c\u53d6\u5f97\u3055\u308c\u3066\u3044\u306a\u3044\u305f\u3081\u3001\u30c6\u30fc\u30d6\u30eb\u3078\u306e\u901a\u5e38\u306e\u8aad\u307f\u66f8\u304d\u64cd\u4f5c\u3068\u4e26\u884c\u3057\u3066\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u3057\u304b\u3057\u4f59\u3063\u305f\u9818\u57df\u306f\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306b\u306f(\u307b\u3068\u3093\u3069\u306e\u5834\u5408)\u8fd4\u3055\u308c\u307e\u305b\u3093\u3002 \u540c\u3058\u30c6\u30fc\u30d6\u30eb\u5185\u3067\u518d\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u4fdd\u6301\u3055\u308c\u308b\u3060\u3051\u3067\u3059\u3002
\n<\/code><\/p>\n

\u307b\u3068\u3093\u3069\u306e\u5834\u5408\u8fd4\u5374\u3055\u308c\u307e\u305b\u3093<\/strong>\u3068\u306e\u4e8b\u3067\u3059\u306e\u3067\u3001\u8fd4\u5374\u3055\u308c\u308b\u3053\u3068\u81ea\u4f53\u306f\u7a00\u3060\u3051\u3069\u3082\u304a\u304b\u3057\u304f\u306a\u3044\u3088\u3046\u3067\u3059\u3002\u3067\u306f\u3069\u306e\u3088\u3046\u306a\u5834\u5408\u306b\u8fd4\u5374\u3055\u308c\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n

<\/p>\n

\u5b9f\u9a13\u7528\u306b\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002DB\u306f\u6709\u308a\u3082\u306e\u3092\u5229\u7528\u3057\u305f\u306e\u30679.4\u7cfb\u3067\u3059\u3002<\/p>\n

\\d vcm_test\nTable \"public.vcm_test\"\nColumn | Type | Modifiers\n--------+-----------------------------+-------------------------------------------------------\nid | integer | not null default nextval('vcm_test_id_seq'::regclass)\ncol1 | text |\ncol2 | text |\ncol3 | integer |\ncol4 | timestamp without time zone |\nIndexes:\n\"vcm_test_pkey\" PRIMARY KEY, btree (id)\n<\/pre>\n
\u624b\u52d5\u3067\u884c\u3044\u305f\u3044\u306e\u3067autovacuum\u3092\u505c\u6b62\u3057\u307e\u3059\u3002<\/p>\n
alter table vcm_test set (autovacuum_enabled = false,toast.autovacuum_enabled = false);\n<\/pre>\n
\u30c7\u30fc\u30bf\u3092\u6295\u5165\u3057\u30011\u51045\u5343\u4e07\u30ec\u30b3\u30fc\u30c9\u306712GB\u7a0b\u5ea6\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
test_db_nishifuji=# select count(*) from vcm_test;\n   count   \n-----------\n 150000000\n\nSELECT relname, (relpages \/ 128) as mbytes  FROM pg_class where relname like '%vcm%' ORDER BY mbytes DESC;\n     relname     | mbytes \n-----------------+--------\n vcm_test        |  12081\n vcm_test_pkey   |   3213\n vcm_test_id_seq |      0\n<\/pre>\n
\u5927\u91cf\u306b\u6d88\u305b\u3070\u56de\u5fa9\u3059\u308b\u306e\u304b\u3092\u8a66\u3059\u305f\u3081\u306bid\u304c\u5076\u6570\u306e\u3082\u306e\u3092\u524a\u9664\u3057\u3066\u534a\u5206\u306e\u30ec\u30b3\u30fc\u30c9\u306b\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n
delete from vcm_test where mod(id,2) = 0;\nDELETE 75000000\n<\/pre>\n
vacuum analyze \u3057\u3066\u898b\u3066\u307f\u307e\u3059\u3002<\/p>\n
SELECT relname, (relpages \/ 128) as mbytes  FROM pg_class where relname like '%vcm%' ORDER BY mbytes DESC;\n     relname     | mbytes \n-----------------+--------\n vcm_test        |  12081\n vcm_test_pkey   |   3213\n vcm_test_id_seq |      0\n<\/pre>\n
\u30c6\u30fc\u30d6\u30eb\u30b5\u30a4\u30ba\u3082index\u3082\u5909\u308f\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n
\u3055\u3089\u306b\u534a\u5206\u306b\u3057\u3066\u307f\u308b\u305f\u3081\u306b4\u3067\u5272\u3063\u3066\u4f59\u308a1\u306b\u306a\u308bid\u3092\u524a\u9664\u3057\u307e\u3057\u305f\u304c\u5909\u308f\u3089\u305a\u3002<\/p>\n
delete from vcm_test where mod(id,4) = 1;\nDELETE 37500000\n<\/pre>\n
\u30ec\u30b3\u30fc\u30c9\u304c\u9818\u57df\u5168\u4f53\u306b\u6563\u3089\u3070\u3063\u3066\u3044\u308b\u72b6\u614b\u3060\u3068\u56de\u53ce\u3055\u308c\u306a\u3044\u3088\u3046\u3067\u3059\u3002<\/p>\n
\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a>\u306b\u306f
\n
\n\u4f8b\u5916\u3068\u3057\u3066\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u672b\u5c3e\u306b\u5b8c\u5168\u306b\u7a7a\u306e\u30da\u30fc\u30b8\u304c\u5b58\u5728\u3057\u3001\u304b\u3064\u305d\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u6392\u4ed6\u30ed\u30c3\u30af\u304c\u5bb9\u6613\u306b\u7372\u5f97\u3067\u304d\u308b\u3088\u3046\u306a\u7279\u6b8a\u306a\u5834\u5408\u306b\u306f\u3001\u305d\u306e\u9818\u57df\u3092\u8fd4\u5374\u3057\u307e\u3059\u3002
\n<\/code><\/p>\n
\u306e\u3088\u3046\u306b\u8a18\u8f09\u304c\u3042\u308b\u306e\u3067\u3001\u73fe\u72b6\u6b8b\u3063\u3066\u3044\u308b\u30ec\u30b3\u30fc\u30c9\u306e\u5f8c\u534a(id\u304c\u5927\u304d\u3044\u3082\u306e)\u3092\u534a\u5206\u524a\u9664\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n
 select count(*) from vcm_test;\n  count   \n----------\n 37500000\n\ndelete from vcm_test where id > 583306573;\nDELETE 18750000\n\nselect count (*) from vcm_test;\n  count   \n----------\n 18750000\n<\/pre>\n
vacuum analyze\u3092\u884c\u3046\u3068<\/p>\n
SELECT relname, (relpages \/ 128) as mbytes  FROM pg_class where relname like '%vcm%' ORDER BY mbytes DESC;\n     relname     | mbytes \n-----------------+--------\n vcm_test        |   6040\n vcm_test_pkey   |   3213\n vcm_test_id_seq |      0\n<\/pre>\n
\u30c6\u30fc\u30d6\u30eb\u30b5\u30a4\u30ba\u304c\u7e2e\u5c0f\u3055\u308c\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u30ec\u30b3\u30fc\u30c9\u6570\u306e\u5272\u306b\u30b5\u30a4\u30ba\u304c\u5927\u304d\u3044\u3088\u3046\u3067\u3059\u3002<\/p>\n
\u518d\u5ea6\u5b9f\u9a13\u3092\u3057\u307e\u3059\u3002\u4e00\u5ea6\u5168\u90e8\u30ec\u30b3\u30fc\u30c9\u3092\u524a\u9664\u3057\u3001vacuum full\u3092\u304b\u3051\u305f\u72b6\u614b\u304b\u3089\u30c7\u30fc\u30bf\u3092\u6295\u5165\u3057\u307e\u3059\u3002<\/p>\n
select count (*) from vcm_test;\n  count   \n----------\n 128000000\n<\/pre>\n
SELECT relname, (relpages \/ 128) as mbytes  FROM pg_class where relname like '%vcm%' ORDER BY mbytes DESC;\n     relname     | mbytes \n-----------------+--------\n vcm_test        |  10309\n vcm_test_pkey   |   2741\n vcm_test_id_seq |      0\n<\/pre>\n
1\u51042800\u4e07\u30ec\u30b3\u30fc\u30c9\u3067\u5927\u4f5310GB\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
\u534a\u5206\u5f31(6000\u4e07\u30ec\u30b3\u30fc\u30c9)\u307b\u3069\u6d88\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n
delete from vcm_test where id > 726306574\n\nDELETE 60000000\n\nselect count (*) from vcm_test;\n  count   \n----------\n 68000000\n<\/pre>\n
vacuum\u5f8c\u30b5\u30a4\u30ba\u3092\u78ba\u8a8d\u3002<\/p>\n
vacuum ANALYZE vcm_test ;\nVACUUM\nSELECT relname, (relpages \/ 128) as mbytes  FROM pg_class where relname like '%vcm%' ORDER BY mbytes DESC;\n     relname     | mbytes \n-----------------+--------\n vcm_test        |   5476\n vcm_test_pkey   |   2741\n vcm_test_id_seq |      0\n<\/pre>\n
\u30b5\u30a4\u30ba\u304c\u7e2e\u5c0f\u3057\u307e\u3057\u305f\u3002\u30c7\u30fc\u30bf\u5f8c\u534a\u306b\u7a7a\u304d\u304c\u3042\u308c\u3070OS\u306b\u9818\u57df\u3092\u8fd4\u5374\u3059\u308b\u3053\u3068\u304c\u3042\u308b\u3088\u3046\u3067\u3059\u3002\u30c7\u30fc\u30bf\u304c\u307e\u3070\u3089\u306b\u6709\u308b\u9818\u57df\u304c\u7121\u3044\u306e\u3067\u5148\u306e\u5b9f\u9a13\u3088\u308a\u30ec\u30b3\u30fc\u30c9\u6570\u3068\u9818\u57df\u30b5\u30a4\u30ba\u306e\u6bd4\u7387\u304c\u826f\u3044\u3088\u3046\u3067\u3059\u3002<\/p>\n
\u305d\u306e\u4ed6\u306e\u30d1\u30bf\u30fc\u30f3\u3082\u5b9f\u9a13\u3057\u305f\u7d50\u679c\u4e0b\u8a18\u306e\u3088\u3046\u306a\u50be\u5411\u304c\u3042\u308a\u305d\u3046\u3067\u3059\u3002
\n\"\"<\/p>\n
Vacuum Full\u304c\u51fa\u6765\u306a\u3044(\u505c\u6b62\u51fa\u6765\u306a\u3044\u3001\u7a7a\u304d\u5bb9\u91cf\u304c\u6b86\u3069\u7121\u3044\u7b49)\u5834\u5408\u306b\u30c1\u30e3\u30ec\u30f3\u30b8\u3057\u3066\u307f\u3066\u3082\u826f\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n
\u518d\u73fe\u304b\u3089\u59cb\u3081\u305f\u306e\u306710GB\u7a0b\u5ea6\u306e\u30c6\u30fc\u30d6\u30eb\u3067\u5b9f\u9a13\u3057\u307e\u3057\u305f\u304c\u3001\u5f8c\u65b9\u9818\u57df\u304c\u7a7a\u3044\u3066\u3044\u308c\u3070100MB\u7a0b\u5ea6\u306e\u30c6\u30fc\u30d6\u30eb\u3067\u3082\u6e1b\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
MBL\u958b\u767a\u90e8 N\u3067\u3059\u3002 \u6700\u8fd1\u3001Postgresql\u3092\u904b\u7528\u3057\u3066\u3044\u3066\u6c17\u306b\u306a\u3063\u305f\u6240\u3092\u8abf\u3079\u3066\u307f\u307e\u3057\u305f\u3002 \u3069\u3093\u306a\u4e8b\u304b\u3068\u8a00\u3044\u307e\u3059\u3068\u300110GB\u7a0b\u5ea6\u3042\u308b\u30c6\u30fc\u30d6\u30eb\u306e\u30c7\u30fc\u30bf\u3092\u5927\u91cf\u306b\u524a\u9664\u3057\u305f\u969b\u306bVacuum\u3092Full\u30aa\u30d7\u30b7\u30e7\u30f3\u4ed8\u304d\u3067\u884c\u3063\u3066\u3044\u306a […]<\/p>\n","protected":false},"author":20,"featured_media":8920,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[],"_links":{"self":[{"href":"https:\/\/test.ecomottblog.com\/index.php?rest_route=\/wp\/v2\/posts\/8893"}],"collection":[{"href":"https:\/\/test.ecomottblog.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.ecomottblog.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.ecomottblog.com\/index.php?rest_route=\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/test.ecomottblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8893"}],"version-history":[{"count":29,"href":"https:\/\/test.ecomottblog.com\/index.php?rest_route=\/wp\/v2\/posts\/8893\/revisions"}],"predecessor-version":[{"id":8941,"href":"https:\/\/test.ecomottblog.com\/index.php?rest_route=\/wp\/v2\/posts\/8893\/revisions\/8941"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.ecomottblog.com\/index.php?rest_route=\/wp\/v2\/media\/8920"}],"wp:attachment":[{"href":"https:\/\/test.ecomottblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.ecomottblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.ecomottblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}