{"id":167524,"date":"2026-04-04T23:11:54","date_gmt":"2026-04-04T21:11:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-yadre-linux-7-0-vyyavili-regressiyu-v-dva-raza-snizhayushhuyu-proizvoditelnost-postgresql"},"modified":"2026-04-04T23:11:54","modified_gmt":"2026-04-04T21:11:54","slug":"v-yadre-linux-7-0-vyyavili-regressiyu-v-dva-raza-snizhayushhuyu-proizvoditelnost-postgresql","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/v-yadre-linux-7-0-vyyavili-regressiyu-v-dva-raza-snizhayushhuyu-proizvoditelnost-postgresql","title":{"rendered":"A Linux 7.0 magj\u00e1ban regresszi\u00f3t fedeztek fel, amely megdupl\u00e1zza a PostgreSQL teljes\u00edtm\u00e9nycs\u00f6kken\u00e9s\u00e9t","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Egy m\u00e9rn\u00f6k az Amazon c\u00e9gt\u0151l felt\u00e1rt egy regresszi\u00f3t, amely a Linux 7.0 kernelre jellemz\u0151, amelynek megjelen\u00e9se \u00e1prilis 13-\u00e1n v\u00e1rhat\u00f3. A feladat\u00fctemez\u0151 be\u00e1ll\u00edt\u00e1sainak m\u00f3dos\u00edt\u00e1sa jelent\u0151s cs\u00f6kken\u00e9st okozott a s\u00e1vsz\u00e9less\u00e9gben \u00e9s a v\u00e1laszid\u0151ben a PostgreSQL adatb\u00e1zis-kezel\u0151 rendszerek ARM64 architekt\u00far\u00e1val m\u0171k\u00f6d\u0151 rendszereken. A 7.0 kernel haszn\u00e1latakor a teljes\u00edtm\u00e9nycs\u00f6kken\u00e9s a pgbench \u201esimple-update\u201d teszt sor\u00e1n majdnem megdupl\u00e1z\u00f3dott \u2013 98565-r\u0151l 50751-re. <\/p>\n

A lassul\u00e1st a preemption (k\u00e9nyszer\u00edt\u00e9s) m\u00f3dj\u00e1nak megv\u00e1ltoz\u00e1sa okozta az alap\u00e9rtelmezett \u00fctemez\u0151n\u00e9l, melyn\u00e9l a PREEMPT_NONE m\u00f3dot PREEMPT_LAZY m\u00f3dra v\u00e1ltott\u00e1k olyan architekt\u00far\u00e1kon, amelyek t\u00e1mogatj\u00e1k ezt a m\u00f3dot, emiatt a PostgreSQL a felhaszn\u00e1l\u00f3i t\u00e9rben 55%-kal t\u00f6bb CPU id\u0151t t\u00f6lt\u00f6tt az s_lock() h\u00edv\u00e1s\u00e1val. A probl\u00e9ma megold\u00e1s\u00e1ra javasolt\u00e1k a PREEMPT_NONE m\u00f3d alap\u00e9rtelmezett vissza\u00e1ll\u00edt\u00e1s\u00e1t, lev\u00e1lasztva annak ARCH_NO_PREEMPT be\u00e1ll\u00edt\u00e1shoz val\u00f3 k\u00f6t\u00e9s\u00e9t. <\/p>\n

Peter Zijlstra, a regresszi\u00f3t okoz\u00f3 m\u00f3dos\u00edt\u00e1sok szerz\u0151je \u00e9s a feladat\u00fctemez\u0151, valamint a z\u00e1rol\u00e1si alrendszerek f\u0151 karbantart\u00f3ja kijelentette, hogy a megold\u00e1st a PostgreSQL k\u00f3dj\u00e1ba kell be\u00e9p\u00edteni. A teljes\u00edtm\u00e9nycs\u00f6kken\u00e9s megsz\u00fcntet\u00e9se \u00e9rdek\u00e9ben azt javasolta, hogy a PostgreSQL-ben haszn\u00e1lj\u00e1k a kernelhez nemr\u00e9giben hozz\u00e1adott \u201erseq slice\u201d (\u00fajrakezdhet\u0151 sorrendek) b\u0151v\u00edtm\u00e9nyt a z\u00e1rol\u00e1s birtokos\u00e1nak kirekeszt\u00e9s\u00e9nek val\u00f3sz\u00edn\u0171s\u00e9g\u00e9nek korl\u00e1toz\u00e1s\u00e1ra. <\/p>\n

Jelenleg nem vil\u00e1gos, hogy Linus Torvalds milyen d\u00f6nt\u00e9st hoz, aki a szab\u00e1lyt k\u00f6veti, miszerint a kernel nem ronthatja el a teljes\u00edtm\u00e9nyt \u00e9s nem rombolhatja le a felhaszn\u00e1l\u00f3i t\u00e9rrel val\u00f3 kompatibilit\u00e1st. Egyr\u00e9szr\u0151l a 7.0 kernel a kiad\u00e1s el\u0151tti v\u00e9gs\u0151 tesztel\u00e9si f\u00e1zisban van, \u00e9s az \u00fctemez\u0151 be\u00e1ll\u00edt\u00e1sainak vissza\u00e1ll\u00edt\u00e1sa tov\u00e1bbi regresszi\u00f3kat okozhat, m\u00e1sr\u00e9szr\u0151l a felhaszn\u00e1l\u00f3k k\u00e9tszeres teljes\u00edtm\u00e9nycs\u00f6kken\u00e9ssel tal\u00e1lkozhatnak a legn\u00e9pszer\u0171bb adatb\u00e1zis-kezel\u0151k egyik\u00e9n\u00e9l.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0418\u043d\u0436\u0435\u043d\u0435\u0440 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Amazon \u0432\u044b\u044f\u0432\u0438\u043b \u0440\u0435\u0433\u0440\u0435\u0441\u0441\u0438\u044e, \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u0447\u043d\u0443\u044e \u0434\u043b\u044f \u044f\u0434\u0440\u0430 Linux 7.0, \u0440\u0435\u043b\u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u043e\u0436\u0438\u0434\u0430\u0435\u0442\u0441\u044f 13 \u0430\u043f\u0440\u0435\u043b\u044f. \u0418\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u043d\u0430\u0441\u0442\u0440\u043e\u0435\u043a \u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u0437\u0430\u0434\u0430\u0447 \u043f\u0440\u0438\u0432\u0435\u043b\u043e \u043a \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u043e\u043c\u0443 \u0441\u043d\u0438\u0436\u0435\u043d\u0438\u044e \u043f\u0440\u043e\u043f\u0443\u0441\u043a\u043d\u043e\u0439 \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u0438 \u0438 \u043e\u0442\u0437\u044b\u0432\u0447\u0438\u0432\u043e\u0441\u0442\u0438 \u043f\u0440\u0438 \u0440\u0430\u0431\u043e\u0442\u0435 \u0421\u0423\u0411\u0414 PostgreSQL \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u0441 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u043e\u0439 ARM64. \u041f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u044f\u0434\u0440\u0430 7.0 \u043f\u043e\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u0438 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u043f\u0440\u0438 \u043f\u0440\u043e\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u0438 \u0442\u0435\u0441\u0442\u0430 pgbench «simple-update» \u0441\u043d\u0438\u0437\u0438\u043b\u0438\u0441\u044c \u043f\u043e\u0447\u0442\u0438 \u0432 \u0434\u0432\u0430 \u0440\u0430\u0437\u0430 — \u0441 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-167524","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47A Linux 7.0 kernelben felfedeztek egy regresszi\u00f3t, amely a PostgreSQL teljes\u00edtm\u00e9ny\u00e9t a fel\u00e9re cs\u00f6kkenti | ProHoster","description":"Egy Amazon m\u00e9rn\u00f6ke felfedezett egy regresszi\u00f3t, amely a Linux 7.0 kernelhez kapcsol\u00f3dik, melynek megjelen\u00e9se \u00e1prilis 13-\u00e1n 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