{"id":183001,"date":"2026-08-15T10:53:29","date_gmt":"2026-08-15T08:53:29","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/v-systemd-journald-spustya-6-let-priznali-problemu-izbytochnoj-nagruzki-na-nakopiteli"},"modified":"2026-08-15T10:53:32","modified_gmt":"2026-08-15T08:53:32","slug":"systemd-journald-acknowledges-excessive-disk-load-problem-after-6-years","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/systemd-journald-acknowledges-excessive-disk-load-problem-after-6-years","title":{"rendered":"W systemd-journald po 6 latach uznano problem nadmiernego obci\u0105\u017cenia no\u015bnik\u00f3w.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Programi\u015bci projektu systemd rozpocz\u0119li badanie i usuwanie d\u0142ugotrwa\u0142ego problemu architektonicznego w komponencie <span class=\"quote\">systemd-journald<\/span>, kt\u00f3ry prowadzi do wielokrotnego zwi\u0119kszenia obj\u0119to\u015bci danych zapisywanych na dysku (wzrost zapisu) w por\u00f3wnaniu do rzeczywistej obj\u0119to\u015bci log\u00f3w.    <\/p>\n<p>Historia si\u0119ga marca 2020 roku, kiedy w systemie \u015bledzenia b\u0142\u0119d\u00f3w zarejestrowano raport, kt\u00f3ry pokaza\u0142, \u017ce generowanie oko\u0142o 500 KB tekstowych log\u00f3w skutkuje ponad 700 MB fizycznych operacji zapisu na SSD. Wtedy programi\u015bci systemd zdecydowanie odm\u00f3wili przyznania si\u0119 do problemu, odpowiedzieli w stylu <span class=\"quote\">nie rozumiecie, jak dzia\u0142aj\u0105 systemy plik\u00f3w<\/span>, odm\u00f3wili przeprowadzenia profilowania i zamkn\u0119li zg\u0142oszenie z werdyktem <span class=\"quote\">nie ma podstaw do dzia\u0142ania<\/span>. Komentarze programist\u00f3w zebra\u0142y setki negatywnych ocen od u\u017cytkownik\u00f3w, jednak stanowisko projektu pozosta\u0142o nieugi\u0119te.    <\/p>\n<p>Na pocz\u0105tku 2026 roku wys\u0142ano ponowny raport o problemie, w trakcie dyskusji niezale\u017cny programista ValdikSS przeprowadzi\u0142 szczeg\u00f3\u0142owe profilowanie z u\u017cyciem izolowanych cgroup i urz\u0105dze\u0144 loop, dobitnie udowadniaj\u0105c mechanizm powstawania problemu: z powodu u\u017cycia mapowanych w pami\u0119ci plik\u00f3w (mmap) i binarnych tabel haszuj\u0105cych zapis nawet jednego tekstowego komunikatu o wielko\u015bci 750 bajt\u00f3w prowadzi do modyfikacji odcisk\u00f3w w pami\u0119ci, co powoduje zrzut na dysk pe\u0142nych 4-kilobajtowych stron i generacj\u0119 od 50 do 70 KB ko\u0144cowego I\/O na poziomie urz\u0105dzenia blokowego.    <\/p>\n<p>Po wczorajszym umieszczeniu raportu o problemie na g\u0142\u00f3wnej stronie Hacker News oraz opublikowaniu niepodwa\u017calnych syntetycznych test\u00f3w, widzowie projektu zmienili retoryk\u0119 i rozpocz\u0119li prace nad optymalizacj\u0105 mechanizm\u00f3w zrzutu pami\u0119ci podr\u0119cznej oraz struktury przechowywania indeks\u00f3w journald.<br \/>\n<br \/>\u0179r\u00f3d\u0142o: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=66082\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 systemd \u043f\u0440\u0438\u0441\u0442\u0443\u043f\u0438\u043b\u0438 \u043a \u0438\u0437\u0443\u0447\u0435\u043d\u0438\u044e \u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e \u0434\u0430\u0432\u043d\u0435\u0439 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u043d\u043e\u0439 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0432 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0435 &#171;systemd-journald&#187;, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0435\u0439 \u043a \u043c\u043d\u043e\u0433\u043e\u043a\u0440\u0430\u0442\u043d\u043e\u043c\u0443 \u0437\u0430\u0432\u044b\u0448\u0435\u043d\u0438\u044e \u043e\u0431\u044a\u0451\u043c\u0430 \u0437\u0430\u043f\u0438\u0441\u044b\u0432\u0430\u0435\u043c\u044b\u0445 \u043d\u0430 \u0434\u0438\u0441\u043a \u0434\u0430\u043d\u043d\u044b\u0445 (write amplification) \u043f\u043e \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u044e \u0441 \u0444\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u043c \u043e\u0431\u044a\u0451\u043c\u043e\u043c \u043b\u043e\u0433\u043e\u0432. \u0418\u0441\u0442\u043e\u0440\u0438\u044f \u0442\u044f\u043d\u0435\u0442\u0441\u044f \u0441 \u043c\u0430\u0440\u0442\u0430 2020 \u0433\u043e\u0434\u0430, \u043a\u043e\u0433\u0434\u0430 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 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[&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-183001","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 systemd \u043f\u0440\u0438\u0441\u0442\u0443\u043f\u0438\u043b\u0438 \u043a \u0438\u0437\u0443\u0447\u0435\u043d\u0438\u044e \u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e \u0434\u0430\u0432\u043d\u0435\u0439 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u043d\u043e\u0439 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0432 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