{"id":544,"date":"2010-06-01T22:02:43","date_gmt":"2010-06-01T14:02:43","guid":{"rendered":"http:\/\/gwokae.mewggle.com\/wordpress\/?p=544"},"modified":"2010-06-01T22:02:43","modified_gmt":"2010-06-01T14:02:43","slug":"%e9%87%8b%e6%94%be%e8%88%87%e6%b8%85%e9%99%a4-linux%e8%a8%98%e6%86%b6%e9%ab%94%e4%b8%ad%e7%9a%84cache-memory","status":"publish","type":"post","link":"https:\/\/gwokae.mewggle.com\/wordpress\/2010\/06\/%e9%87%8b%e6%94%be%e8%88%87%e6%b8%85%e9%99%a4-linux%e8%a8%98%e6%86%b6%e9%ab%94%e4%b8%ad%e7%9a%84cache-memory\/","title":{"rendered":"\u91cb\u653e\u8207\u6e05\u9664 Linux\u8a18\u61b6\u9ad4\u4e2d\u7684Cache Memory"},"content":{"rendered":"<blockquote><p>\u53c3\u8003\u7db2\u7ad9<br \/>\n<a href=\"http:\/\/www.ubuntu-unleashed.com\/2008\/04\/free-up-cache-memory-in-linux.html\" target=\"_blank\">http:\/\/www.ubuntu-unleashed.com\/2008\/04\/free-up-cache-memory-in-linux.html<\/a><br \/>\n<a href=\"http:\/\/www.linuxinsight.com\/proc_sys_vm_drop_caches.html\" target=\"_blank\">http:\/\/www.linuxinsight.com\/proc_sys_vm_drop_caches.html<\/a><br \/>\n<a href=\"http:\/\/blog.linux.org.tw\/~jserv\/archives\/002039.html\" target=\"_blank\">http:\/\/blog.linux.org.tw\/~jserv\/archives\/002039.html<\/a><br \/>\n<a href=\"http:\/\/phorum.study-area.org\/index.php?topic=39976.0;wap2\" target=\"_blank\">http:\/\/phorum.study-area.org\/index.php?topic=39976.0;wap2<\/a><\/p><\/blockquote>\n<p>\u5728Linux Kernel 2.6.16\u5f8c\u5c0d\u65bcLinux\u7684VM(Virtual Memory)\u9032\u884c\u4e86\u8abf\u6574\uff0c\u56e0\u6b64\u6703\u5728top\u7b49\u6307\u4ee4\u767c\u73fe\u96d6\u7136process\u6240\u4f7f\u7528\u7684\u8a18\u61b6\u9ad4\u4e0d\u591a\uff0c\u4f46\u662f\u900f\u904efree\u4f86\u89c0\u5bdf\u537b\u767c\u73fe\u53ea\u5269\u4e0b\u4e00\u9ede\u9ede\u7684\u5269\u9918\u8a18\u61b6\u9ad4\u3002<\/p>\n<p>\u4f46\u662f\u95dc\u9589\u4e00\u4e9b\u7a0b\u5f0f\u537b\u767c\u73fetotal\u7684free memory\u4e26\u6c92\u6709\u88ab\u91cb\u653e\uff0c\u9020\u6210\u7cfb\u7d71\u5269\u9918\u8a18\u61b6\u9ad4\u7e3d\u662f\u4e0d\u5920\u7684\u611f\u89ba\uff0c\u800c\u5168\u90e8processes\u4f54\u7528\u7684\u8a18\u61b6\u9ad4\u597d\u50cf\u4e5f\u6c92\u6709\u5be6\u969b\u4e0a\u770b\u5230\u7684\u90a3\u9ebc\u591a\uff0c\u9019\u5176\u5be6\u662fcache\u5360\u7528\u4e86memory\u4e2d\u7684\u7a7a\u9593\u3002\u800c\u4e14\u4f46\u662f\u6839\u64da\u5c0f\u5dde\u8001\u5e2b(kenduest\uff0c\u662f\u6211\u7684\u555f\u8499\u6069\u5e2b\u5462\uff5e\u6ce3\uff5e)\u8868\u793a\uff0c\u96d6\u7136\u8a18\u61b6\u9ad4\u5269\u9918\u7a7a\u9593\u770b\u8d77\u4f86\u6c92\u6709\u88ab\u91cb\u653e\uff0c\u4f46\u662fprocess\u5be6\u969b\u9700\u8981\u4f7f\u7528\u6642kernel\u4ecd\u6703\u81ea\u52d5\u5f9ememory\u91cb\u653ecache\u7d66process\u4f7f\u7528\uff0c\u6240\u4ee5\u4f7f\u7528\u8005\u4e0d\u5fc5\u64d4\u5fc3\u3002<\/p>\n<p>\u2193 \u4f7f\u7528top\u6307\u4ee4\u770b\u5230\u7684\u5269\u9918\u8a18\u61b6\u9ad4\uff0c\u8207free\u6307\u4ee4\u770b\u5230\u7684\u5bb9\u91cf\u662f\u5dee\u4e0d\u591a\u7684<br \/>\n<a href=\"http:\/\/www.flickr.com\/photos\/gwokae\/4658774995\/\" target=\"_blank\"><a href=\"http:\/\/www.flickr.com\/photos\/gwokae\/4658774995\/\"><img loading=\"lazy\" src=\"https:\/\/farm2.staticflickr.com\/1302\/4658774995_7365763c13.jpg\" alt=\"linux_top\" width=\"500\" height=\"387\" \/><\/a><\/a><\/p>\n<p>\u2193 \u5728\u57f7\u884c\u4e00\u4e9b\u9700\u8981\u5927\u91cfcache\u7684\u7a0b\u5f0f\u5f8c\u6703\u767c\u73fe\u5269\u4e0b\u7684\u8a18\u61b6\u9ad4\u53ea\u5269\u4e0b\u4e00\u9ede\uff0c\u800c\u5be6\u969b\u4e0a\u8655\u7406\u7a0b\u5e8f\u537b\u6c92\u6709\u7528\u6389\u90a3\u9ebc\u591a\u8a18\u61b6\u9ad4<br \/>\n<a href=\"http:\/\/www.flickr.com\/photos\/gwokae\/4658775067\/\" target=\"_blank\"><a href=\"http:\/\/www.flickr.com\/photos\/gwokae\/4658775067\/\"><img loading=\"lazy\" src=\"https:\/\/farm2.staticflickr.com\/1307\/4658775067_ab4bd322bb.jpg\" alt=\"linux_top_cache\" width=\"500\" height=\"387\" \/><\/a><\/a><\/p>\n<p>\u2193 \u800c\u5982\u679c\u662f\u7528htop\u6307\u4ee4\u4f86\u89c0\u5bdf\u7cfb\u7d71\u72c0\u6cc1\u7684\u8a71\u6703\u767c\u73fememory\u7684bar\u96d6\u7136\u5f88\u9577\uff0c\u4f46\u662f\u5be6\u969b\u4e0a\u537b\u53ea\u5403\u63891GB\u7684\u8a18\u61b6\u9ad4\uff0c\u5176\u5be6bar\u7684\u9ec3\u8272\u90e8\u5206\u662fcache\u4f54\u7528\u7684\uff0c\u8655\u7406\u7a0b\u5e8f\u8981\u4f7f\u7528\u6642kenel\u9084\u662f\u6703\u81ea\u52d5\u5c07cache\u91cb\u653e\u7d66\u8655\u7406\u7a0b\u5e8f\u4f7f\u7528\u3002<br \/>\n<a href=\"http:\/\/www.flickr.com\/photos\/gwokae\/4658774945\/\" target=\"_blank\"><a href=\"http:\/\/www.flickr.com\/photos\/gwokae\/4658774945\/\"><img loading=\"lazy\" src=\"https:\/\/farm2.staticflickr.com\/1298\/4658774945_de599e88c1.jpg\" alt=\"linux_htop_cache\" width=\"500\" height=\"387\" \/><\/a><\/a><\/p>\n<p>\u8981\u5f37\u5236\u624b\u52d5\u91cb\u653e\u6216\u6e05\u9664Linux\u4e2d\u7684Cache Memory\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u6307\u4ee4<\/p>\n<blockquote><p>echo 3 &gt; \/proc\/sys\/vm\/drop_caches<\/p><\/blockquote>\n<p>3 \u662f\u6307\u91cb\u653epagecache\u3001dentries\u8207inodes\uff0c\u4e5f\u5c31\u662f\u91cb\u653e\u6240\u6709\u7684cache\uff0c\u5176\u4ed6\u4e5f\u53ef\u4ee5\u4e0b\uff1a<\/p>\n<blockquote><p>#\u91cb\u653epagecache<br \/>\necho 1 &gt; \/proc\/sys\/vm\/drop_caches<\/p><\/blockquote>\n<blockquote><p>#\u91cb\u653edentries\u8207inodes<br \/>\necho 2 &gt; \/proc\/sys\/vm\/drop_caches<\/p><\/blockquote>\n<p>\u2193 \u4e0b\u904e\u6307\u4ee4\u5f8c\uff0c\u5c31\u53ef\u4ee5\u5728htop\u4e2d\u5c31\u53ef\u4ee5\u89c0\u5bdf\u5230\u9ec3\u8272\u90e8\u5206\u7684cache\u4e0d\u898b\u4e86<br \/>\n<a href=\"http:\/\/www.flickr.com\/photos\/gwokae\/4658774879\/\" target=\"_blank\"><a href=\"http:\/\/www.flickr.com\/photos\/gwokae\/4658774879\/\"><img loading=\"lazy\" src=\"https:\/\/farm5.staticflickr.com\/4054\/4658774879_8bd8fcb744.jpg\" alt=\"linux_htop\" width=\"500\" height=\"387\" \/><\/a><\/a><\/p>\n<p>\u6253\u5b8c\u6536\u5de5\uff0c\u611f\u8b1d\u6536\u770b\u5695\uff5e<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u53c3\u8003\u7db2\u7ad9 http:\/\/www.ubuntu-unleashed.com\/2008\/04\/free-up-cache-memory-in-linux.html http:\/\/www.linuxinsight.com\/proc_sys_vm_drop_caches.html http:\/\/blog.linux.org.tw\/~jserv\/archives\/002039.html http:\/\/phorum.study-area.org\/index.php?topic=39976.0;wap2 \u5728Linux Kernel 2.6.16\u5f8c\u5c0d\u65bcLinux\u7684VM(Virtual Memory)\u9032\u884c\u4e86\u8abf\u6574\uff0c\u56e0\u6b64\u6703\u5728top\u7b49\u6307\u4ee4\u767c\u73fe\u96d6\u7136process\u6240\u4f7f\u7528\u7684\u8a18\u61b6\u9ad4\u4e0d\u591a\uff0c\u4f46\u662f\u900f\u904efree\u4f86\u89c0\u5bdf\u537b\u767c\u73fe\u53ea\u5269\u4e0b\u4e00\u9ede\u9ede\u7684\u5269\u9918\u8a18\u61b6\u9ad4\u3002 \u4f46\u662f\u95dc\u9589\u4e00\u4e9b\u7a0b\u5f0f\u537b\u767c\u73fetotal\u7684free memory\u4e26\u6c92\u6709\u88ab\u91cb\u653e\uff0c\u9020\u6210\u7cfb\u7d71\u5269\u9918\u8a18\u61b6\u9ad4\u7e3d\u662f\u4e0d\u5920\u7684\u611f\u89ba\uff0c\u800c\u5168\u90e8processes\u4f54\u7528\u7684\u8a18\u61b6\u9ad4\u597d\u50cf\u4e5f\u6c92\u6709\u5be6\u969b\u4e0a\u770b\u5230\u7684\u90a3\u9ebc\u591a\uff0c\u9019\u5176\u5be6\u662fcache\u5360\u7528\u4e86memory\u4e2d\u7684\u7a7a\u9593\u3002\u800c\u4e14\u4f46\u662f\u6839\u64da\u5c0f\u5dde\u8001\u5e2b(kenduest\uff0c\u662f\u6211\u7684\u555f\u8499\u6069\u5e2b\u5462\uff5e\u6ce3\uff5e)\u8868\u793a\uff0c\u96d6\u7136\u8a18\u61b6\u9ad4\u5269\u9918\u7a7a\u9593\u770b\u8d77\u4f86\u6c92\u6709\u88ab\u91cb\u653e\uff0c\u4f46\u662fprocess\u5be6\u969b\u9700\u8981\u4f7f\u7528\u6642kernel\u4ecd\u6703\u81ea\u52d5\u5f9ememory\u91cb\u653ecache\u7d66process\u4f7f\u7528\uff0c\u6240\u4ee5\u4f7f\u7528\u8005\u4e0d\u5fc5\u64d4\u5fc3\u3002 \u2193 \u4f7f\u7528top\u6307\u4ee4\u770b\u5230\u7684\u5269\u9918\u8a18\u61b6\u9ad4\uff0c\u8207free\u6307\u4ee4\u770b\u5230\u7684\u5bb9\u91cf\u662f\u5dee\u4e0d\u591a\u7684 \u2193 \u5728\u57f7\u884c\u4e00\u4e9b\u9700\u8981\u5927\u91cfcache\u7684\u7a0b\u5f0f\u5f8c\u6703\u767c\u73fe\u5269\u4e0b\u7684\u8a18\u61b6\u9ad4\u53ea\u5269\u4e0b\u4e00\u9ede\uff0c\u800c\u5be6\u969b\u4e0a\u8655\u7406\u7a0b\u5e8f\u537b\u6c92\u6709\u7528\u6389\u90a3\u9ebc\u591a\u8a18\u61b6\u9ad4 \u2193 \u800c\u5982\u679c\u662f\u7528htop\u6307\u4ee4\u4f86\u89c0\u5bdf\u7cfb\u7d71\u72c0\u6cc1\u7684\u8a71\u6703\u767c\u73fememory\u7684bar\u96d6\u7136\u5f88\u9577\uff0c\u4f46\u662f\u5be6\u969b\u4e0a\u537b\u53ea\u5403\u63891GB\u7684\u8a18\u61b6\u9ad4\uff0c\u5176\u5be6bar\u7684\u9ec3\u8272\u90e8\u5206\u662fcache\u4f54\u7528\u7684\uff0c\u8655\u7406\u7a0b\u5e8f\u8981\u4f7f\u7528\u6642kenel\u9084\u662f\u6703\u81ea\u52d5\u5c07cache\u91cb\u653e\u7d66\u8655\u7406\u7a0b\u5e8f\u4f7f\u7528\u3002 \u8981\u5f37\u5236\u624b\u52d5\u91cb\u653e\u6216\u6e05\u9664Linux\u4e2d\u7684Cache Memory\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u6307\u4ee4 echo 3 &gt; \/proc\/sys\/vm\/drop_caches 3 \u662f\u6307\u91cb\u653epagecache\u3001dentries\u8207inodes\uff0c\u4e5f\u5c31\u662f\u91cb\u653e\u6240\u6709\u7684cache\uff0c\u5176\u4ed6\u4e5f\u53ef\u4ee5\u4e0b\uff1a #\u91cb\u653epagecache echo 1 &gt; \/proc\/sys\/vm\/drop_caches #\u91cb\u653edentries\u8207inodes echo 2 &gt; \/proc\/sys\/vm\/drop_caches \u2193 \u4e0b\u904e\u6307\u4ee4\u5f8c\uff0c\u5c31\u53ef\u4ee5\u5728htop\u4e2d\u5c31\u53ef\u4ee5\u89c0\u5bdf\u5230\u9ec3\u8272\u90e8\u5206\u7684cache\u4e0d\u898b\u4e86 \u6253\u5b8c\u6536\u5de5\uff0c\u611f\u8b1d\u6536\u770b\u5695\uff5e<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[15],"tags":[26,43,48,73],"_links":{"self":[{"href":"https:\/\/gwokae.mewggle.com\/wordpress\/wp-json\/wp\/v2\/posts\/544"}],"collection":[{"href":"https:\/\/gwokae.mewggle.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gwokae.mewggle.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gwokae.mewggle.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gwokae.mewggle.com\/wordpress\/wp-json\/wp\/v2\/comments?post=544"}],"version-history":[{"count":0,"href":"https:\/\/gwokae.mewggle.com\/wordpress\/wp-json\/wp\/v2\/posts\/544\/revisions"}],"wp:attachment":[{"href":"https:\/\/gwokae.mewggle.com\/wordpress\/wp-json\/wp\/v2\/media?parent=544"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gwokae.mewggle.com\/wordpress\/wp-json\/wp\/v2\/categories?post=544"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gwokae.mewggle.com\/wordpress\/wp-json\/wp\/v2\/tags?post=544"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}