{"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\/et\/blog\/news\/v-yadre-linux-7-0-vyyavili-regressiyu-v-dva-raza-snizhayushhuyu-proizvoditelnost-postgresql","title":{"rendered":"Linuxi tuum 7.0-s avastati regressioon, mis v\u00e4hendab PostgreSQL-i j\u00f5udlust kahekordselt.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Amazoni insener tuvastas Linux 7.0 tuuma spetsiifilise regressiooni, mille v\u00e4ljalaskmine on kavandatud 13. aprilliks. \u00dclesannete ajastamise seadete muutmine p\u00f5hjustas m\u00e4rkimisv\u00e4\u00e4rse l\u00e4bilaskev\u00f5ime ja reageerimisv\u00f5ime languse PostgreSQL andmebaasi t\u00f6\u00f6tlemisel ARM64 arhitektuuriga s\u00fcsteemides. Linux 7.0 tuuma kasutamisel langes j\u00f5udlus pgbench testis 'simple-update' peaaegu kahekordselt \u2014 98565-lt 50751-le. <\/p>\n

Aeglustumine on tingitud v\u00e4ljat\u00f5rjumise (preemption) re\u017eiimi muutumisest vaikimisi ajakava seadmes PREEMPT_NONE-lt PREEMPT_LAZY-le arhitektuurides, mis toetavad sellist re\u017eiimi, mille t\u00f5ttu veetis PostgreSQL kasutajaruumi 55% CPU ajast s_lock() kutsumise peale. Probleemi lahendamiseks on soovitatud naasta vaikimisi re\u017eiimile PREEMPT_NONE ja eemaldada selle seos ARCH_NO_PREEMPT seadega. <\/p>\n

Peter Zijlstra, muudatuste autor, mis p\u00f5hjustasid regressiooni, ja tuumaplaneerimiss\u00fcsteemi ning lukustuss\u00fcsteemi hooldaja, \u00fctles, et parandused tuleb teha PostgreSQL koodis. J\u00f5udluse languse leevendamiseks soovitas ta PostgreSQL-is kasutusele v\u00f5tta tuumale hiljuti lisatud laiend 'rseq slice' (Restartable Sequences), et v\u00e4hendada lukustuse hoidjate v\u00e4ljat\u00f5ukamise t\u00f5en\u00e4osust. <\/p>\n

Praegu ei ole selge, millise otsuse teeb Linus Torvalds, kes j\u00e4rgib reeglit, et tuum ei tohi halvendada t\u00f6\u00f6v\u00f5imet ega rikuda \u00fchilduvust kasutajaruumi. \u00dchest k\u00fcljest on Linux 7.0 l\u00f5ppfaasis testimisel ja ajakava seadete tagasiviimine v\u00f5ib tuua kaasa muid regressioone, kuid teisest k\u00fcljest v\u00f5ivad kasutajad kokku puutuda \u00fche k\u00f5ige populaarsema andmebaasi, PostgreSQL, kaks korda madalama j\u00f5udlusega.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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[…]<\/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\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\udd47Linux 7.0 tuumas tuvastati regressioon, mis v\u00e4hendab PostgreSQL-i j\u00f5udlust kaks korda | ProHoster","description":"Amazoni insener leidis Linux 7.0. tuuma spetsiifilise regressiooni, mille v\u00e4ljaanne on oodata 13. 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