{"id":36877,"date":"2019-10-31T22:14:28","date_gmt":"2019-10-31T19:14:28","guid":{"rendered":"https:\/\/prohoster.info\/blog\/yadro-linux-ne-mozhet-myagko-obrabatyvat-situatsii-s-nehvatkoj-pamyati\/"},"modified":"2019-10-31T22:14:28","modified_gmt":"2019-10-31T19:14:28","slug":"yadro-linux-ne-mozhet-myagko-obrabatyvat-situatsii-s-nehvatkoj-pamyati","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/yadro-linux-ne-mozhet-myagko-obrabatyvat-situatsii-s-nehvatkoj-pamyati","title":{"rendered":"Nucleul Linux nu poate gestiona cu bl\u00e2nde\u021be situa\u021biile de lips\u0103 de memorie","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00cen lista de discu\u021bii a dezvoltatorilor kernelului Linux <noindex><a rel=\"nofollow\" href=\"https:\/\/lkml.org\/lkml\/2019\/8\/4\/15\">a fost ridicat\u0103<\/a><\/noindex> problema cu gestionarea situa\u021biei de epuizare a memoriei libere \u00een Linux:<\/p>\n<blockquote>\n<p>Exist\u0103 o problem\u0103 cunoscut\u0103 care \u00eei afecteaz\u0103 pe mul\u021bi utilizatori de ani de zile, care poate fi reprodus\u0103 \u00een mai pu\u021bin de c\u00e2teva minute pe cea mai recent\u0103 versiune a kernelului Linux 5.2.6. Toate set\u0103rile kernelului sunt configurate pe valorile implicite.<\/p>\n<p>Pa\u0219i:<\/p>\n<ul>\n<li class=\"l\"> Ne \u00eenc\u0103rc\u0103m cu parametrul &#171;mem=4G&#187;.\n<li class=\"l\"> Dezactiv\u0103m suportul pentru swap (sudo swapoff -a).\n<li class=\"l\"> Deschidem orice browser web, cum ar fi Chrome\/Chromium sau\/\u0219i Firefox.\n<li class=\"l\"> \u00cencepem s\u0103 deschidem tab-uri cu website-uri \u0219i observ\u0103m cum scade volumul de memorie liber\u0103.\n<\/ul>\n<p>Odat\u0103 ce apare o situa\u021bie \u00een care un nou tab necesit\u0103 mai mult\u0103 memorie RAM dec\u00e2t este disponibil\u0103, sistemul se blocheaz\u0103 aproape complet. Va fi foarte greu s\u0103 mu\u021bi cursorul mouse-ului. Indicatorul hard disk-ului va clipi continuu (nu \u00een\u021beleg de ce). Nu vei putea lansa aplica\u021bii noi sau \u00eenchide aplica\u021biile curente care sunt deja deschise.<\/p>\n<p>Aceast\u0103 mic\u0103 criz\u0103 poate dura c\u00e2teva minute sau mai mult. Presupun c\u0103 sistemul nu ar trebui s\u0103 se comporte a\u0219a. Cred c\u0103 trebuie s\u0103 facem ceva pentru a evita astfel de &#171;blocaje&#187;.<\/p>\n<p>Sunt aproape sigur c\u0103 se pot modifica anumite set\u0103ri sysctl pentru a evita astfel de situa\u021bii, dar ceva \u00eemi spune c\u0103 acest lucru poate fi configurat implicit pentru toat\u0103 lumea, deoarece utilizatorii neexperimenta\u021bi care se confrunt\u0103 cu aceast\u0103 problem\u0103 pur \u0219i simplu vor renun\u021ba la utilizarea Linux \u0219i nu vor avea timp s\u0103 caute solu\u021bii pe Google.\n<\/p><\/blockquote>\n<p>\u00cen <noindex><a rel=\"nofollow\" href=\"https:\/\/www.reddit.com\/r\/linux\/comments\/cmg48b\/lets_talk_about_the_elephant_in_the_room_the\/\">comentarii<\/a><\/noindex> pe Reddit, unii utilizatori sugereaz\u0103 activarea swap-ului, dar aceasta nu rezolv\u0103 problema, ci doar o am\u00e2n\u0103 \u0219i adesea o agraveaz\u0103. Ca o posibil\u0103 solu\u021bie \u00een viitor, s-ar putea utiliza noua <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=49842\">4.20<\/a><\/noindex> \u0219i \u00eembun\u0103t\u0103\u021bit\u0103 \u00een kernel <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51051\">5.2<\/a><\/noindex> subsistem PSI (Pressure Stall Information), care permite analizarea informa\u021biilor despre timpul de a\u0219teptare pentru ob\u021binerea diferitelor resurse (CPU, memorie, I\/O). Acest subsistem ofer\u0103 posibilitatea de a monitoriza deficitul de memorie \u00eentr-o etap\u0103 timpurie, de a identifica sursa problemelor \u0219i de a \u00eenchide aplica\u021biile neimportante, evit\u00e2nd astfel apari\u021bia unor efecte vizibile pentru utilizator. <\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Sursa: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51231\">opennet.ro<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u0441\u043f\u0438\u0441\u043a\u0435 \u0440\u0430\u0441\u0441\u044b\u043b\u043a\u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u044f\u0434\u0440\u0430 Linux \u043f\u043e\u0434\u043d\u044f\u0442\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0441 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u043e\u0439 \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0438 \u0438\u0441\u0447\u0435\u0440\u043f\u0430\u043d\u0438\u044f \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 \u0432 Linux: \u0418\u0437\u0432\u0435\u0441\u0442\u043d\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0434\u043e\u043d\u0438\u043c\u0430\u0435\u0442 \u043c\u043d\u043e\u0436\u0435\u0441\u0442\u0432\u043e \u043b\u044e\u0434\u0435\u0439 \u043d\u0430 \u043f\u0440\u043e\u0442\u044f\u0436\u0435\u043d\u0438\u0438 \u043c\u043d\u043e\u0433\u0438\u0445 \u043b\u0435\u0442 \u0438 \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u043c\u043e\u0436\u043d\u043e \u0432\u043e\u0441\u043f\u0440\u043e\u0438\u0437\u0432\u0435\u0441\u0442\u0438 \u043c\u0435\u043d\u044c\u0448\u0435, \u0447\u0435\u043c \u0437\u0430 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043c\u0438\u043d\u0443\u0442 \u043d\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u044f\u0434\u0440\u0430 Linux 5.2.6. \u0412\u0441\u0435 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b \u044f\u0434\u0440\u0430 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u044b \u0432 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e. \u0428\u0430\u0433\u0438: \u0417\u0430\u0433\u0440\u0443\u0436\u0430\u0435\u043c\u0441\u044f \u0441 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u043c &#171;mem=4G&#187;. \u0412\u044b\u043a\u043b\u044e\u0447\u0430\u0435\u043c [&hellip;]<\/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-36877","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u0441\u043f\u0438\u0441\u043a\u0435 \u0440\u0430\u0441\u0441\u044b\u043b\u043a\u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u044f\u0434\u0440\u0430 Linux \u043f\u043e\u0434\u043d\u044f\u0442\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0441 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u043e\u0439 \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0438 \u0438\u0441\u0447\u0435\u0440\u043f\u0430\u043d\u0438\u044f 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