{"id":38073,"date":"2019-10-31T22:21:32","date_gmt":"2019-10-31T19:21:32","guid":{"rendered":"https:\/\/prohoster.info\/blog\/istoriya-aktivnyh-sessij-v-postgresql-novoe-rasshirenie-pgsentinel\/"},"modified":"2019-10-31T22:21:32","modified_gmt":"2019-10-31T19:21:32","slug":"istoriya-aktivnyh-sessij-v-postgresql-novoe-rasshirenie-pgsentinel","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/istoriya-aktivnyh-sessij-v-postgresql-novoe-rasshirenie-pgsentinel","title":{"rendered":"PostgreSQL-i aktiivsete sessioonide ajalugu \u2013 uus laiendus pgsentinel.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ettev\u00f5te <noindex><a rel=\"nofollow\" href=\"https:\/\/www.pgsentinel.com\/\">pgsentinel<\/a><\/noindex> v\u00e4lja andnud samanimelise pgsentinel laienduse (<noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/pgsentinel\/pgsentinel\">githubi repo<\/a><\/noindex>), mis lisab PostgreSQL-i pg_active_session_history vaate \u2014 aktiivsete seansside ajaloo (sarnanedes Oracle'i v$active_session_history-ga).<\/p>\n<p>Sisuliselt on see lihtsalt igasekundilised hetkepildid pg_stat_activity-st, kuid on olulisi punkte:<\/p>\n<ol>\n<li>Kogu kogutud teave salvestatakse ainult muutm\u00e4lu, samas kui tarbitav m\u00e4lu maht reguleeritakse viimaste salvestatud kirjetega.<\/li>\n<li>Lisatakse v\u00e4li queryid \u2014 just see queryid pg_stat_statements laiendusest (n\u00f5uab eelnevat installi).<\/li>\n<li>Lisatakse v\u00e4li top_level_query \u2014 p\u00e4ringu tekst, mille kaudu k\u00e4ivitatakse praegune p\u00e4ring (pl\/pgsql-i kasutamise korral)<\/li>\n<\/ol>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<b class=\"spoiler_title\">T\u00e4ielik loetelu pg_active_session_history v\u00e4ljadest:<\/b><\/p>\n<pre>\n      Veerg        |           T\u00fc\u00fcp           \n------------------+--------------------------\n ash_time         | ajatemperatuur koos ajav\u00f6\u00f6ndiga \n datid            | oid                      \n datname          | tekst                    \n pid              | t\u00e4isarv                 \n usesysid         | oid                      \n usename          | tekst                    \n application_name | tekst                    \n client_addr      | tekst                    \n client_hostname  | tekst                    \n client_port      | t\u00e4isarv                 \n backend_start    | ajatemperatuur koos ajav\u00f6\u00f6ndiga \n xact_start       | ajatemperatuur koos ajav\u00f6\u00f6ndiga \n query_start      | ajatemperatuur koos ajav\u00f6\u00f6ndiga \n state_change     | ajatemperatuur koos ajav\u00f6\u00f6ndiga \n wait_event_type  | tekst                    \n wait_event       | tekst                    \n state            | tekst                    \n backend_xid      | xid                      \n backend_xmin     | xid                      \n top_level_query  | tekst                    \n query            | tekst                    \n queryid          | bigint                   \n backend_type     | tekst                     \n<\/pre>\n<p>Valmis paketinstallatsiooni jaoks pole hetkel saadaval. Soovitame allalaadida l\u00e4htekoodid ja koguda teek ise. Esiteks tuleb installida oma serveri jaoks \"devel\"-pakett ja PATH-i muutuja alla kirjutada pg_configi tee. Kogume:<\/p>\n<blockquote><p>cd pgsentinel\/src<br \/>\nmake<br \/>\nmake install<\/p><\/blockquote>\n<p>\nLisame parameetrid postgres.conf-i:<\/p>\n<blockquote><p>shared_preload_libraries = 'pg_stat_statements,pgsentinel'<br \/>\ntrack_activity_query_size = 2048<br \/>\npg_stat_statements.track = all<\/p>\n<p># \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u0443\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u044b\u0445 \u0432 \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0438\u0445 \u0437\u0430\u043f\u0438\u0441\u0435\u0439<br \/>\npgsentinel_ash.max_entries = 10000<\/p><\/blockquote>\n<p>\nTaask\u00e4ivitame PostgreSQL ja loome laienduse:<\/p>\n<blockquote><p>create extension pgsentinel;<\/p><\/blockquote>\n<p>\nKogutud teave v\u00f5imaldab vastata sellistele k\u00fcsimustele nagu:<\/p>\n<ul>\n<li>Millistel seanssidel veedeti k\u00f5ige rohkem aega?<\/li>\n<li>Millised seansid olid k\u00f5ige aktiivsemad?<\/li>\n<li>Millised p\u00e4ringud olid k\u00f5ige aktiivsemad?<\/li>\n<\/ul>\n<p>\nNeed k\u00fcsimused on v\u00f5imalikud muidugi SQL-p\u00e4ringutega, kuid mugavam on neid visuaalselt n\u00e4ha graafikul, hiirega huvipakkuvaid ajavahemikke esile t\u00f5stes. Saate seda teha tasuta programmi abil <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/dbacvetkov\/PASH-Viewer\">PASH-Viewer<\/a><\/noindex> (koostatavad binaarid on saadaval jaotises <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/dbacvetkov\/PASH-Viewer\/releases\">Releases<\/a><\/noindex>).<\/p>\n<p>PASH-Viewer alustamisel (alates versioonist 0.4.0) kontrollib, kas pg_active_session_history vaate olemasolu ja kui see on olemas, siis laadib sellest kogu kogutud ajaloo ning j\u00e4tkab uute andmete lugemist, uuendades graafikut iga 15 sekundi j\u00e4rel.<\/p>\n<p><img decoding=\"async\" alt=\"PostgreSQL-i aktiivsete sessioonide ajalugu \u2013 uus laiendus pgsentinel.\" src=\"\/wp-content\/uploads\/2019\/09\/2517772983f6ad87c0a895c190043ae1.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/416909\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f pgsentinel \u0432\u044b\u043f\u0443\u0441\u0442\u0438\u043b\u0430 \u043e\u0434\u043d\u043e\u0438\u043c\u0451\u043d\u043d\u043e\u0435 \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u0435 pgsentinel (\u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u0439 github), \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0435 \u0432 PostgreSQL \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0435 pg_active_session_history \u2014 \u0438\u0441\u0442\u043e\u0440\u0438\u044e \u0430\u043a\u0442\u0438\u0432\u043d\u044b\u0445 \u0441\u0435\u0441\u0441\u0438\u0439 (\u043f\u043e \u0430\u043d\u0430\u043b\u043e\u0433\u0438\u0438 \u0441 \u043e\u0440\u0430\u043a\u043b\u043e\u0432\u043e\u0439 v$active_session_history). \u041f\u043e \u0441\u0443\u0442\u0438, \u044d\u0442\u043e \u043f\u0440\u043e\u0441\u0442\u043e-\u043d\u0430\u043f\u0440\u043e\u0441\u0442\u043e \u0435\u0436\u0435\u0441\u0435\u043a\u0443\u043d\u0434\u043d\u044b\u0435 \u0441\u043d\u0438\u043c\u043a\u0438 \u0438\u0437 pg_stat_activity, \u043d\u043e \u0435\u0441\u0442\u044c \u0432\u0430\u0436\u043d\u044b\u0435 \u043c\u043e\u043c\u0435\u043d\u0442\u044b: \u0412\u0441\u044f \u043d\u0430\u043a\u043e\u043f\u043b\u0435\u043d\u043d\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u0445\u0440\u0430\u043d\u0438\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u043e\u043f\u0435\u0440\u0430\u0442\u0438\u0432\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438, \u0430 \u043f\u043e\u0442\u0440\u0435\u0431\u043b\u044f\u0435\u043c\u044b\u0439 \u043e\u0431\u044a\u0451\u043c \u043f\u0430\u043c\u044f\u0442\u0438 \u0440\u0435\u0433\u0443\u043b\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e\u043c \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0438\u0445 \u0445\u0440\u0430\u043d\u0438\u043c\u044b\u0445 \u0437\u0430\u043f\u0438\u0441\u0435\u0439. \u0414\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u043b\u0435 queryid \u2014 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":28580,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-38073","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f pgsentinel \u0432\u044b\u043f\u0443\u0441\u0442\u0438\u043b\u0430 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\u0441\u0435\u0441\u0441\u0438\u0439 \u0432 PostgreSQL \u2014 \u043d\u043e\u0432\u043e\u0435 \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u0435 pgsentinel | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f pgsentinel \u0432\u044b\u043f\u0443\u0441\u0442\u0438\u043b\u0430 \u043e\u0434\u043d\u043e\u0438\u043c\u0451\u043d\u043d\u043e\u0435 \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u0435 pgsentinel (\u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u0439 github), \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0435 \u0432 PostgreSQL \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0435 pg_active_session_history \u2014 \u0438\u0441\u0442\u043e\u0440\u0438\u044e \u0430\u043a\u0442\u0438\u0432\u043d\u044b\u0445 \u0441\u0435\u0441\u0441\u0438\u0439 (\u043f\u043e \u0430\u043d\u0430\u043b\u043e\u0433\u0438\u0438 \u0441 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content=\"2019-10-31T19:21:32+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2019-10-31T19:21:32+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47Aktiivsete sessioonide ajalugu PostgreSQL-is \u2014 uus laiendus pgsentinel | ProHoster","description":"PGSentinel on v\u00e4lja andnud samanimelise laienduse pgsentinel (GitHubi hoidla), mis lisab PostgreSQL-i vaate pg_active_session_history \u2014 aktiivsete sessioonide ajaloo (analoogiliselt Oracle'i v$active_session_history'le). Sisuliselt on need lihtsalt igasugused igasekundilised kaadrid pg_stat_activity'st, kuid on m\u00f5ned olulised punktid: kogu kogutud teave salvestatakse ainult m\u00e4lus ning kasulik m\u00e4lu maht reguleeritakse viimaste salvestatud kirje arvu j\u00e4rgi. 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