{"id":5745,"date":"2021-06-14T02:53:00","date_gmt":"2021-06-14T02:53:00","guid":{"rendered":"https:\/\/www.magetop.com\/blog\/?p=5745"},"modified":"2021-07-23T03:58:40","modified_gmt":"2021-07-23T03:58:40","slug":"them-bo-nho-swap-trong-ubuntu","status":"publish","type":"post","link":"https:\/\/www.magetop.com\/blog\/them-bo-nho-swap-trong-ubuntu\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn th\u00eam b\u1ed9 nh\u1edb Swap trong Ubuntu"},"content":{"rendered":"\n<p>Trong b\u00e0i vi\u1ebft n\u00e0y, m\u00ecnh s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n&nbsp;c\u00e1ch th\u00eam b\u1ed9 nh\u1edb Swap(Swap Space) tr\u00ean Ubuntu.&nbsp;S\u1eed d\u1ee5ng \u1ed5 c\u1ee9ng l\u00e0m b\u1ed9 nh\u1edb t\u1ea1m th\u1eddi \u0111\u1ec3 b\u1ed5 sung b\u1ed9 nh\u1edb v\u1eadt l\u00fd (RAM) khi x\u1eed l\u00fd c\u00e1c t\u00e1c v\u1ee5 l\u1edbn h\u01a1n dung l\u01b0\u1ee3ng RAM m\u00e0 b\u1ea1n hi\u1ec7n \u0111ang c\u00f3.\\<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Swap Space l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p>Swap space hay c\u00f2n g\u1ecdi l\u00e0 swap memory, l\u00e0 m\u1ed9t kh\u00f4ng gian tr\u00ean \u1ed5 c\u1ee9ng thay th\u1ebf cho b\u1ed9 nh\u1edb v\u1eadt l\u00fd. B\u1ed9 nh\u1edb \u1ea3o l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa RAM v\u00e0 kh\u00f4ng gian \u1ed5 m\u00e0 c\u00e1c ti\u1ebfn tr\u00ecnh \u0111ang ch\u1ea1y c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng. C\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01a1n gi\u1ea3n \u0111\u00e2y l\u00e0 ph\u1ea7n b\u1ed9 nh\u1edb \u1ea3o trong \u1ed5 c\u1ee9ng, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi RAM \u0111\u1ea7y.<\/p>\n\n\n\n<p>V\u00ec n\u00f3 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a \u1ed5 c\u1ee9ng n\u00ean n\u00f3 c\u00f3 th\u1eddi gian truy c\u1eadp ch\u1eadm h\u01a1n b\u1ed9 nh\u1edb v\u1eadt l\u00fd kho\u1ea3ng 10 \u0111\u1ebfn 1000 l\u1ea7n.&nbsp;N\u1ebfu h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n li\u00ean t\u1ee5c h\u1ebft b\u1ed9 nh\u1edb, b\u1ea1n n\u00ean b\u1ed5 sung th\u00eam RAM.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c b\u01b0\u1edbc \u0111\u1ec3 th\u00eam b\u1ed9 nh\u1edb Swap tr\u00ean Ubuntu<\/h2>\n\n\n\n<p><em><strong>L\u01b0u \u00fd:&nbsp;<\/strong>S\u1eed d\u1ee5ng user root ho\u1eb7c ng\u01b0\u1eddi d\u00f9ng c\u00f3 \u0111\u1eb7c quy\u1ec1n sudo c\u00f3 th\u1ec3 k\u00edch ho\u1ea1t file swap.<\/em><\/p>\n\n\n\n<p>M\u00ecnh s\u1ebd t\u1ea1o m\u1ed9t&nbsp;t\u1ec7p swap&nbsp;4GB.&nbsp;B\u1ea1n c\u00f3 th\u1ec3 s\u1eeda \u0111\u1ec3 th\u00eam k\u00edch th\u01b0\u1edbc b\u1ea1n mong mu\u1ed1n.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 1:<\/strong>&nbsp;T\u1ea1o file swap, b\u1ea1n ch\u1ea1y l\u1ec7nh:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nsudo fallocate -l 4G \/swapfile\n<\/pre><\/div>\n\n\n<p>N\u1ebfu \u201cfaillocate\u201d ch\u01b0a \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t ho\u1eb7c th\u00f4ng b\u00e1o l\u1ed7i:\u201dfallocate failed: Operation not supported\u201d, h\u00e3y s\u1eed d\u1ee5ng l\u1ec7nh sau \u0111\u1ec3 t\u1ea1o file swap:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nsudo dd if=\/dev\/zero of=\/swapfile bs=1024 count=4194304\n<\/pre><\/div>\n\n\n<p><em><strong>L\u01b0u \u00fd:<\/strong>&nbsp;bs&nbsp;= 1024 c\u00f3 ngh\u0129a l\u00e0 \u0111\u1ecdc v\u00e0 ghi t\u1ed1i \u0111a 1024 byte c\u00f9ng m\u1ed9t l\u00fac v\u00e0&nbsp;count&nbsp;= (1024 x 4096) k\u00edch th\u01b0\u1edbc MB c\u1ee7a t\u1ec7p.<\/em><\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 2:<\/strong>&nbsp;\u0110\u1eb7t file permissions th\u00e0nh 600 cho file swap:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nsudo chmod 600 \/swapfile\n<\/pre><\/div>\n\n\n<p><strong>B\u01b0\u1edbc 3:<\/strong>&nbsp;T\u1ea1o v\u00f9ng swap tr\u00ean t\u1ec7p:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nsudo mkswap \/swapfile\n<\/pre><\/div>\n\n\n<p>B\u1ea1n s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 nh\u01b0 sau:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nSetting up swapspace version 1, size = 4 GiB (4294963200 bytes)\nno label, UUID=9888e511-ff44-4cb3-a999-c9b072a75a67\n<\/pre><\/div>\n\n\n<p><strong>B\u01b0\u1edbc 4<\/strong>: B\u1eadt file swap:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nsudo swapon \/swapfile\n<\/pre><\/div>\n\n\n<p>\u0110\u1ec3 th\u1ef1c hi\u1ec7n thay \u0111\u1ed5i v\u0129nh vi\u1ec5n, h\u00e3y m\u1edf file \/etc\/fstab:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nsudo nano \/etc\/fstab\n<\/pre><\/div>\n\n\n<p>Ti\u1ebfp theo, b\u1ea1n d\u00e1n \u0111o\u1ea1n sau v\u00e0o:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n\/swapfile swap swap defaults 0 0\n<\/pre><\/div>\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"153\" data-attachment-id=\"6150\" data-permalink=\"https:\/\/www.magetop.com\/blog\/how-to-add-swap-space-on-ubuntu\/paste-the-following-line-to-fstab-file\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Paste-the-following-line-to-fstab-file.jpg?fit=1100%2C211&amp;ssl=1\" data-orig-size=\"1100,211\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"Paste-the-following-line-to-fstab-file\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Paste-the-following-line-to-fstab-file.jpg?fit=300%2C58&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Paste-the-following-line-to-fstab-file.jpg?fit=800%2C153&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Paste-the-following-line-to-fstab-file.jpg?resize=800%2C153&#038;ssl=1\" alt=\"\" class=\"wp-image-6150\" srcset=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Paste-the-following-line-to-fstab-file.jpg?resize=1024%2C196&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Paste-the-following-line-to-fstab-file.jpg?resize=300%2C58&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Paste-the-following-line-to-fstab-file.jpg?resize=768%2C147&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Paste-the-following-line-to-fstab-file.jpg?w=1100&amp;ssl=1 1100w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p><strong>B\u01b0\u1edbc 5:<\/strong>&nbsp;B\u00e2y gi\u1edd h\u00e3y ki\u1ec3m tra file swap \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ea1o b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng l\u1ec7nh swapon:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nsudo swapon --show\n<\/pre><\/div>\n\n\n<p>K\u1ebft qu\u1ea3:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nNAME      TYPE SIZE USED PRIO\n\/swapfile file   4G   0B   -2\n<\/pre><\/div>\n\n\n<p>S\u1eed d\u1ee5ng l\u1ec7nh free:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nsudo free -h\n<\/pre><\/div>\n\n\n<p>K\u1ebft qu\u1ea3:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n              total        used        free      shared  buff\/cache   available\nMem:          1.9Gi       885Mi       189Mi        61Mi       912Mi       849Mi\nSwap:         4.0Gi          0B       4.0Gi\n<\/pre><\/div>\n\n\n<h2 class=\"wp-block-heading\">\u0110i\u1ec1u ch\u1ec9nh gi\u00e1 tr\u1ecb Swappiness<\/h2>\n\n\n\n<p>B\u1ea1n c\u00f3 th\u1ec3 ki\u1ec3m tra gi\u00e1 tr\u1ecb swappiness hi\u1ec7n t\u1ea1i b\u1eb1ng l\u1ec7nh sau:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\ncat \/proc\/sys\/vm\/swappiness\n<\/pre><\/div>\n\n\n<p>K\u1ebft qu\u1ea3:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nOutput:\n60\n<\/pre><\/div>\n\n\n<p>\u0110\u1ec3 \u0111\u1eb7t t\u1ea7n su\u1ea5t kernel c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng file swap, h\u00e3y m\u1edf t\u1ec7p \/etc\/sysctl.conf.<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nsudo nano \/etc\/sysctl.conf\n<\/pre><\/div>\n\n\n<p>Sau \u0111\u00f3 th\u00eam \u0111o\u1ea1n sau:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nvm.swappiness=10\n<\/pre><\/div>\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"348\" data-attachment-id=\"6152\" data-permalink=\"https:\/\/www.magetop.com\/blog\/how-to-add-swap-space-on-ubuntu\/set-kernel-for-the-swap-file\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Set-kernel-for-the-swap-file.jpg?fit=1100%2C478&amp;ssl=1\" data-orig-size=\"1100,478\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"Set-kernel-for-the-swap-file\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Set-kernel-for-the-swap-file.jpg?fit=300%2C130&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Set-kernel-for-the-swap-file.jpg?fit=800%2C348&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Set-kernel-for-the-swap-file.jpg?resize=800%2C348&#038;ssl=1\" alt=\"\" class=\"wp-image-6152\" srcset=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Set-kernel-for-the-swap-file.jpg?resize=1024%2C445&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Set-kernel-for-the-swap-file.jpg?resize=300%2C130&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Set-kernel-for-the-swap-file.jpg?resize=768%2C334&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2021\/07\/Set-kernel-for-the-swap-file.jpg?w=1100&amp;ssl=1 1100w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p><em><strong>L\u01b0u \u00fd:<\/strong>&nbsp;Gi\u00e1 tr\u1ecb m\u1eb7c \u0111\u1ecbnh c\u1ee7a kh\u00f4ng gian swap th\u01b0\u1eddng xuy\u00ean c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 60 (gi\u00e1 tr\u1ecb t\u1ed1i \u0111a l\u00e0 100).&nbsp;Con s\u1ed1 c\u00e0ng cao, kernel c\u00e0ng s\u1eed d\u1ee5ng kh\u00f4ng gian swap th\u01b0\u1eddng xuy\u00ean h\u01a1n.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">X\u00f3a File Swap<\/h2>\n\n\n\n<p>\u0110\u1ec3 x\u00f3a file swap b\u1ea1n l\u00e0m theo c\u00e1c b\u01b0\u1edbc.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 1:<\/strong>&nbsp;H\u1ee7y k\u00edch ho\u1ea1t:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nsudo swapoff -v \/swapfile\n<\/pre><\/div>\n\n\n<p><strong>B\u01b0\u1edbc 2:<\/strong>&nbsp;X\u00f3a d\u00f2ng \u201c\/swapfile swap swap defaults 0 0\u201d \u0111\u00e3 \u0111\u01b0\u1ee3c nh\u1eadp trong \/etc\/fstab. Sau \u0111\u00f3 x\u00f3a swapfile v\u1edbi l\u1ec7nh:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nsudo rm \/swapfile\n<\/pre><\/div>\n\n\n<p>Nh\u01b0 v\u1eady l\u00e0 m\u00ecnh \u0111\u00e3 h\u01b0\u1edbng d\u1eabn xong c\u00e1ch th\u00eam b\u1ed9 nh\u1edb Swap(Swap space) trong&nbsp;<a href=\"https:\/\/www.magetop.com\/blog\/cach-cai-dat-apache-tren-ubuntu-20-04\/\" target=\"_blank\" rel=\"noreferrer noopener\">Ubuntu<\/a>.<\/p>\n\n\n\n<p>C\u1ea3m \u01a1n b\u1ea1n \u0111\u00e3 \u0111\u1ecdc b\u00e0i vi\u1ebft.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trong b\u00e0i vi\u1ebft n\u00e0y, m\u00ecnh s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n\u00a0c\u00e1ch th\u00eam b\u1ed9 nh\u1edb Swap(Swap Space) tr\u00ean Ubuntu.<\/p>\n","protected":false},"author":108,"featured_media":6552,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[226],"tags":[1578,1579],"class_list":["post-5745","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vn","tag-huong-dan-them-bo-nho-swap-trong-ubuntu","tag-them-bo-nho-swap-trong-ubuntu"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>H\u01b0\u1edbng d\u1eabn th\u00eam b\u1ed9 nh\u1edb Swap(Swap Space) trong Ubuntu - Magetop Blog<\/title>\n<meta name=\"description\" content=\"Trong b\u00e0i vi\u1ebft n\u00e0y m\u00ecnh s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n c\u00e1ch th\u00eam b\u1ed9 nh\u1edb Swap(Swap Space) tr\u00ean Ubuntu . S\u1eed d\u1ee5ng \u1ed5 c\u1ee9ng l\u00e0m b\u1ed9 nh\u1edb t\u1ea1m th\u1eddi \u0111\u1ec3 b\u1ed5 sung RAM.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.magetop.com\/blog\/them-bo-nho-swap-trong-ubuntu\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"H\u01b0\u1edbng d\u1eabn th\u00eam b\u1ed9 nh\u1edb Swap(Swap Space) trong Ubuntu - Magetop Blog\" \/>\n<meta property=\"og:description\" content=\"Trong b\u00e0i vi\u1ebft n\u00e0y m\u00ecnh s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n c\u00e1ch th\u00eam b\u1ed9 nh\u1edb Swap(Swap Space) tr\u00ean Ubuntu . 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