{"id":54854,"date":"2020-01-06T00:00:00","date_gmt":"2020-01-05T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/v-fedora-32-namereny-vklyuchit-earlyoom-dlya-rannego-reagirovaniya-na-nehvatku-pamyati"},"modified":"2020-02-18T14:02:54","modified_gmt":"2020-02-18T11:02:54","slug":"v-fedora-32-namereny-vklyuchit-earlyoom-dlya-rannego-reagirovaniya-na-nehvatku-pamyati","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/v-fedora-32-namereny-vklyuchit-earlyoom-dlya-rannego-reagirovaniya-na-nehvatku-pamyati","title":{"rendered":"Ve Fedo\u0159e 32 pl\u00e1nuj\u00ed zahrnout earlyoom pro v\u010dasnou reakci na nedostatek pam\u011bti","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Byl zve\u0159ejn\u011bn<\/a><\/noindex> pl\u00e1n<\/a><\/noindex> zapnut\u00ed<\/a><\/noindex> ve v\u00fdchoz\u00edm nastaven\u00ed v Fedo\u0159e 32 pro b\u011b\u017e\u00edc\u00ed procesy earlyoom<\/a><\/noindex> pro v\u010dasnou reakci na nedostatek pam\u011bti v syst\u00e9mu. Pokud je dostupn\u00e1 pam\u011b\u0165 ni\u017e\u0161\u00ed ne\u017e stanoven\u00e1 hodnota, earlyoom prost\u0159ednictv\u00edm odesl\u00e1n\u00ed SIGTERM (pokud je voln\u00e1 pam\u011b\u0165 pod 10 %) nebo SIGKILL (< 5 %) n\u00e1siln\u011b ukon\u010d\u00ed proces, kter\u00fd nejv\u00edce vyu\u017e\u00edv\u00e1 pam\u011b\u0165 (m\u00e1 nejvy\u0161\u0161\u00ed hodnotu \/proc\/*\/oom_score), ani\u017e by do\u0161lo k vy\u010di\u0161t\u011bn\u00ed syst\u00e9mov\u00fdch buffer\u016f. Earlyoom umo\u017en\u00ed rychlej\u0161\u00ed reakci na nedostatek pam\u011bti, ani\u017e by do\u0161lo k vyvol\u00e1n\u00ed OOM (Out Of Memory) handleru v j\u00e1d\u0159e, kter\u00fd se spou\u0161t\u00ed, kdy\u017e situace se stane kritickou a syst\u00e9m obvykle ji\u017e nereaguje na akce u\u017eivatele.<\/p>\n

V d\u00e1lkov\u00fdch verz\u00edch Fedory se zva\u017euje mo\u017enost<\/a><\/noindex> zapnut\u00ed zpracovatele nedostatku pam\u011bti low-memory-monitor<\/a><\/noindex>, kter\u00fd vyu\u017e\u00edv\u00e1 nov\u011b p\u0159idan\u00e9 rozhran\u00ed v j\u00e1d\u0159e Linuxu 5.2<\/a><\/noindex> proc\/pressure\/memory pro posouzen\u00ed nedostatku pam\u011bti v syst\u00e9mu, ale na rozd\u00edl od earlyoom okam\u017eit\u011b neukon\u010duje procesy, ale odes\u00edl\u00e1 prost\u0159ednictv\u00edm DBus ozn\u00e1men\u00ed o pot\u0159eb\u011b sn\u00ed\u017eit spot\u0159ebu pam\u011bti (pokud se situace n\u00e1sledn\u011b neuklidn\u00ed, je mo\u017en\u00e9 aktivovat OOM Killer<\/a><\/noindex> j\u00e1dra). Low-memory-monitor vy\u017eaduje \u00fapravu aplikac\u00ed, a proto se zva\u017euje jako \u0159e\u0161en\u00ed pro budoucnost, kter\u00e9 bude mo\u017en\u00e9 nasadit po p\u0159izp\u016fsoben\u00ed aplikac\u00ed GNOME. <\/p>\n

Pro sledov\u00e1n\u00ed situace s nedostatkem pam\u011bti aplikacemi v Glibu 2.63.3<\/a><\/noindex> bylo p\u0159id\u00e1no API GMemoryMonitor<\/a><\/noindex>, umo\u017e\u0148uj\u00edc\u00ed<\/a><\/noindex> kter\u00e9 monitoruje sign\u00e1ly z low-memory-monitor a p\u0159ij\u00edm\u00e1 opat\u0159en\u00ed (nap\u0159\u00edklad aplikace m\u016f\u017ee uvolnit pam\u011b\u0165 pou\u017e\u00edvanou pro mezipam\u011b\u0165, ulo\u017eit soubory, spustit sb\u011br odpadu, pokusit se sn\u00ed\u017eit fragmentaci pam\u011bti nebo ukon\u010dit ne\u010dinn\u00e9 pomocn\u00e9 procesy). Podpora
\nGMemoryMonitor byla tak\u00e9 p\u0159id\u00e1na do xdg-desktop-portal pro pou\u017eit\u00ed v izolovan\u00fdch aplikac\u00edch dod\u00e1van\u00fdch ve form\u00e1tu flatpak.<\/p>\n

<\/a><\/noindex><\/p>\n

Zdroj: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u043f\u043b\u0430\u043d \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0432 Fedora 32 \u0444\u043e\u043d\u043e\u0432\u043e\u0433\u043e \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430 earlyoom \u0434\u043b\u044f \u0440\u0430\u043d\u043d\u0435\u0433\u043e \u0440\u0435\u0430\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043d\u0430 \u043d\u0435\u0445\u0432\u0430\u0442\u043a\u0443 \u043f\u0430\u043c\u044f\u0442\u0438 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435. \u0415\u0441\u043b\u0438 \u043e\u0431\u044a\u0451\u043c \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 \u043c\u0435\u043d\u044c\u0448\u0435 \u0437\u0430\u0434\u0430\u043d\u043d\u043e\u0433\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f, \u0442\u043e earlyoom \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 SIGTERM (\u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 \u043c\u0435\u043d\u044c\u0448\u0435 10%) \u0438\u043b\u0438 SIGKILL (< 5%) \u043f\u0440\u0438\u043d\u0443\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e (\u0437\u0430\u0432\u0435\u0440\u0448\u0438\u0442 \u0440\u0430\u0431\u043e\u0442\u0443 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430, \u043d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u0430\u043a\u0442\u0438\u0432\u043d\u043e \u043f\u043e\u0442\u0440\u0435\u0431\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u043f\u0430\u043c\u044f\u0442\u044c (\u0438\u043c\u0435\u044e\u0449\u0435\u0433\u043e \u0441\u0430\u043c\u043e\u0435 \u0431\u043e\u043b\u044c\u0448\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \/proc\/*\/oom_score), \u043d\u0435 \u0434\u043e\u0432\u043e\u0434\u044f \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-54854","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\udd47 V Fedo\u0159e 32 pl\u00e1nuj\u00ed zahrnout earlyoom pro v\u010dasnou reakci na nedostatek pam\u011bti | ProHoster","description":"Byl 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