{"id":442431,"date":"2026-02-15T13:39:31","date_gmt":"2026-02-15T05:39:31","guid":{"rendered":"https:\/\/idc.net\/help\/?p=442431"},"modified":"2026-02-05T13:40:17","modified_gmt":"2026-02-05T05:40:17","slug":"linux-%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%86%85%e5%ad%98%e4%bd%bf%e7%94%a8%e4%b8%8e%e8%b0%83%e4%bc%98","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/442431\/","title":{"rendered":"Linux \u670d\u52a1\u5668\u5185\u5b58\u4f7f\u7528\u4e0e\u8c03\u4f18"},"content":{"rendered":"<p dir=\"auto\">Linux \u5185\u5b58\u7ba1\u7406\u662f\u670d\u52a1\u5668\u8fd0\u7ef4\u4e2d\u6700\u5bb9\u6613\u88ab\u8bef\u89e3\u3001\u4e5f\u6700\u5bb9\u6613\u5bfc\u81f4\u4e25\u91cd\u6545\u969c\u7684\u9886\u57df\u4e4b\u4e00\u3002 \u5f88\u591a\u4eba\u770b\u5230 free -h \u91cc used \u5f88\u9ad8\u3001free \u5f88\u4f4e\u5c31\u7d27\u5f20\uff0c\u4ee5\u4e3a\u5185\u5b58\u8981\u7206\u4e86\uff0c\u7136\u540e\u75af\u72c2\u6740\u8fdb\u7a0b\u3001\u52a0 swap\u3001\u8c03 swappiness\uff0c\u7ed3\u679c\u7cfb\u7edf\u53cd\u800c\u66f4\u5361\uff1b\u4e5f\u6709\u4eba\u770b\u5230\u5927\u91cf cache\/buffer \u5c31\u89c9\u5f97\u201c\u5185\u5b58\u6d6a\u8d39\u4e86\u201d\uff0c\u624b\u52a8 drop_caches \u6e05\u7f13\u5b58\uff0c\u7ed3\u679c\u6570\u636e\u5e93\u3001\u6587\u4ef6\u7cfb\u7edf\u6027\u80fd\u77ac\u95f4\u66b4\u8dcc\u3002<\/p>\n<p dir=\"auto\">\u672c\u6587\u4ece<strong>\u771f\u5b9e\u751f\u4ea7\u89c6\u89d2<\/strong>\u51fa\u53d1\uff0c\u7cfb\u7edf\u8bb2\u89e3 Linux \u5185\u5b58\u4f7f\u7528\u7684\u6b63\u786e\u7406\u89e3\u65b9\u5f0f\u3001\u5173\u952e\u6307\u6807\u89e3\u8bfb\u3001\u5e38\u89c1\u8bef\u533a\u3001\u8c03\u4f18\u601d\u8def\u4e0e\u4f18\u5148\u7ea7\uff0c\u5e2e\u52a9\u4f60\u5efa\u7acb\u4e00\u5957\u201c\u770b\u61c2\u5185\u5b58 \u2192 \u5224\u65ad\u662f\u5426\u771f\u7f3a \u2192 \u5408\u7406\u8c03\u4f18\u201d\u7684\u5b8c\u6574\u65b9\u6cd5\u8bba\u3002<\/p>\n<h2 dir=\"auto\">\u4e00\u3001Linux \u5185\u5b58\u4f7f\u7528\u7684\u6b63\u786e\u8ba4\u77e5\uff08\u5148\u641e\u6e05\u695a\u8fd9\u51e0\u70b9\uff09<\/h2>\n<p dir=\"auto\">Linux \u5185\u6838\u7684\u5185\u5b58\u7ba1\u7406\u54f2\u5b66\u53ef\u4ee5\u7528\u4e00\u53e5\u8bdd\u6982\u62ec\uff1a<\/p>\n<p dir=\"auto\"><strong>\u201c\u7a7a\u95f2\u5185\u5b58\u662f\u6d6a\u8d39\u7684\u8d44\u6e90\u201d<\/strong><\/p>\n<p dir=\"auto\">\u5185\u6838\u4f1a\u5c3d\u53ef\u80fd\u628a\u6240\u6709\u7a7a\u95f2\u5185\u5b58\u7528\u4f5c\uff1a<\/p>\n<ul dir=\"auto\">\n<li>page cache\uff08\u6587\u4ef6\u7f13\u5b58\uff09<\/li>\n<li>buffer cache\uff08\u5757\u8bbe\u5907\u7f13\u51b2\uff09<\/li>\n<li>slab \u7f13\u5b58\uff08inode\/dentry\/kmalloc \u7b49\u5185\u6838\u5bf9\u8c61\uff09<\/li>\n<li>\u5404\u79cd\u533f\u540d\u6620\u5c04\u3001\u5171\u4eab\u5185\u5b58\u7b49<\/li>\n<\/ul>\n<p dir=\"auto\">\u56e0\u6b64\uff0cfree -h \u91cc\u770b\u5230\u7684 <strong>free \u5217<\/strong> \u51e0\u4e4e\u6c38\u8fdc\u90fd\u5f88\u5c0f\uff0c<strong>\u771f\u6b63\u80fd\u7528\u7684\u5185\u5b58\u5176\u5b9e\u662f available \u5217<\/strong>\u3002<\/p>\n<p dir=\"auto\"><strong>\u5173\u952e\u6307\u6807\u5bf9\u7167\u8868<\/strong>\uff08\u751f\u4ea7\u6700\u5e38\u7528\uff09<\/p>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<div dir=\"auto\">\n<div><\/div>\n<table dir=\"auto\">\n<thead>\n<tr>\n<th data-col-size=\"lg\">\u6307\u6807<\/th>\n<th data-col-size=\"lg\">\u542b\u4e49<\/th>\n<th data-col-size=\"lg\">\u5173\u6ce8\u9608\u503c\uff08\u7269\u7406\u5185\u5b58\u5360\u6bd4\uff09<\/th>\n<th data-col-size=\"md\">\u89e3\u91ca\u4e0e\u5efa\u8bae<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-col-size=\"lg\"><strong>Mem: available<\/strong><\/td>\n<td data-col-size=\"lg\">\u771f\u6b63\u53ef\u5206\u914d\u7ed9\u65b0\u8fdb\u7a0b\u7684\u5185\u5b58\uff08\u6700\u91cd\u8981\uff09<\/td>\n<td data-col-size=\"lg\">&lt; 10\u201315% \u62a5\u8b66 &lt; 5% \u4e25\u91cd<\/td>\n<td data-col-size=\"md\">\u4f4e\u4e8e\u6b64\u503c\u5f00\u59cb\u51fa\u73b0\u538b\u529b<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"lg\"><strong>Mem: used<\/strong><\/td>\n<td data-col-size=\"lg\">\u5df2\u5206\u914d\u7ed9\u8fdb\u7a0b + \u5185\u6838\u4f7f\u7528\u7684\u5185\u5b58<\/td>\n<td data-col-size=\"lg\">\u2014<\/td>\n<td data-col-size=\"md\">\u4e0d\u8981\u53ea\u770b\u8fd9\u4e2a<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"lg\"><strong>Mem: buff\/cache<\/strong><\/td>\n<td data-col-size=\"lg\">page cache + buffer + slab<\/td>\n<td data-col-size=\"lg\">\u8d8a\u9ad8\u8d8a\u597d<\/td>\n<td data-col-size=\"md\">\u8fd9\u662f\u201c\u597d\u4e8b\u201d\uff0c\u53ef\u56de\u6536<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"lg\"><strong>Swap: used<\/strong><\/td>\n<td data-col-size=\"lg\">\u5df2\u4f7f\u7528\u7684\u4ea4\u6362\u5206\u533a<\/td>\n<td data-col-size=\"lg\">&gt; 0 \u5f00\u59cb\u5173\u6ce8 &gt; 10% \u4e25\u91cd<\/td>\n<td data-col-size=\"md\">\u6301\u7eed\u6362\u9875 = \u5185\u5b58\u771f\u4e0d\u8db3<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"lg\"><strong>si\/so (vmstat)<\/strong><\/td>\n<td data-col-size=\"lg\">\u6bcf\u79d2 swap in \/ swap out<\/td>\n<td data-col-size=\"lg\">&gt; \u51e0\u5341 KB\/s \u6301\u7eed\u5c31\u95ee\u9898<\/td>\n<td data-col-size=\"md\">\u6362\u9875\u901f\u7387\u662f\u5173\u952e<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"lg\"><strong>kswapd0 \/ khugepaged<\/strong><\/td>\n<td data-col-size=\"lg\">\u5185\u6838\u5185\u5b58\u56de\u6536\u7ebf\u7a0b CPU \u5360\u7528<\/td>\n<td data-col-size=\"lg\">\u6301\u7eed &gt; 5\u201310% \u8bf4\u660e\u538b\u529b\u5927<\/td>\n<td data-col-size=\"md\">\u5185\u5b58\u56de\u6536\u5403 CPU<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u4e00\u53e5\u8bdd\u603b\u7ed3<\/strong>\uff1a <strong>\u5185\u5b58\u662f\u5426\u7d27\u5f20\uff0c\u770b available + si\/so + kswapd0 CPU\uff0c\u800c\u4e0d\u662f used \u6216 free<\/strong>\u3002<\/p>\n<h2 dir=\"auto\">\u4e8c\u3001\u5e38\u89c1\u5185\u5b58\u4f7f\u7528\u6a21\u5f0f\u4e0e\u5224\u65ad\u6807\u51c6<\/h2>\n<h3 dir=\"auto\">1. \u5065\u5eb7\u72b6\u6001\uff08\u6700\u7406\u60f3\uff09<\/h3>\n<ul dir=\"auto\">\n<li>available &gt; 20\u201330%<\/li>\n<li>swap used = 0 \u6216\u6781\u5c11<\/li>\n<li>buff\/cache \u5360 40\u201370%<\/li>\n<li>kswapd0 \u51e0\u4e4e\u4e0d\u5403 CPU<\/li>\n<li>\u4e1a\u52a1\u5ef6\u8fdf\u7a33\u5b9a\uff0c\u65e0\u660e\u663e\u6296\u52a8<\/li>\n<\/ul>\n<h3 dir=\"auto\">2. \u8f7b\u5ea6\u538b\u529b\uff08\u9700\u5173\u6ce8\uff09<\/h3>\n<ul dir=\"auto\">\n<li>available 10\u201320%<\/li>\n<li>swap used &lt; 5%\uff0c\u5076\u5c14\u6709\u5c11\u91cf si\/so<\/li>\n<li>kswapd0 \u5076\u5c14\u5c0f\u5e45\u6ce2\u52a8<\/li>\n<\/ul>\n<p dir=\"auto\">\u6b64\u65f6\u65e0\u9700\u7acb\u5373\u5e72\u9884\uff0c\u4f46\u5e94\u5f00\u59cb\u6392\u67e5\uff1a<\/p>\n<ul dir=\"auto\">\n<li>\u662f\u5426\u6709\u5185\u5b58\u6cc4\u6f0f\u8fdb\u7a0b<\/li>\n<li>\u662f\u5426\u53ef\u4ee5\u51cf\u5c11\u5e38\u9a7b\u5185\u5b58\uff08Java heap\u3001Redis maxmemory\u3001MySQL innodb_buffer_pool\uff09<\/li>\n<li>\u662f\u5426\u53ef\u4ee5\u52a0\u7269\u7406\u5185\u5b58<\/li>\n<\/ul>\n<h3 dir=\"auto\">3. \u4e2d\u5ea6\u538b\u529b\uff08\u5fc5\u987b\u4f18\u5316\uff09<\/h3>\n<ul dir=\"auto\">\n<li>available &lt; 10%<\/li>\n<li>swap used 5\u201320%\uff0csi\/so \u6301\u7eed\u51e0\u5341 KB\/s<\/li>\n<li>kswapd0 \u5360\u7528 5\u201320% CPU<\/li>\n<\/ul>\n<p dir=\"auto\">\u6b64\u65f6\u7cfb\u7edf\u5df2\u7ecf\u5f00\u59cb\u51fa\u73b0\u5ef6\u8fdf\u6296\u52a8\uff0c\u5fc5\u987b\u7acb\u5373\u884c\u52a8\u3002<\/p>\n<h3 dir=\"auto\">4. \u4e25\u91cd\u538b\u529b\uff08\u7cfb\u7edf\u6fd2\u4e34\u5d29\u6e83\uff09<\/h3>\n<ul dir=\"auto\">\n<li>available &lt; 5% \u6216 \u51e0\u767e MB<\/li>\n<li>swap used &gt; 30\u201350%<\/li>\n<li>si\/so \u51e0 MB\/s \u4ee5\u4e0a<\/li>\n<li>kswapd0 \/ khugepaged \u5403 30%+ CPU<\/li>\n<li>OOM killer \u5f00\u59cb\u6740\u8fdb\u7a0b\uff08dmesg \u6709 Out of memory \u8bb0\u5f55\uff09<\/li>\n<\/ul>\n<p dir=\"auto\">\u6b64\u65f6\u901a\u5e38\u5df2\u7ecf\u51fa\u73b0\u660e\u663e\u7684\u4e1a\u52a1\u8d85\u65f6\u3001\u8fde\u63a5\u5806\u79ef\u3001\u751a\u81f3\u7cfb\u7edf\u5047\u6b7b\u3002<\/p>\n<h2 dir=\"auto\">\u4e09\u3001\u5185\u5b58\u8c03\u4f18\u7684\u4f18\u5148\u7ea7\u4e0e\u9ad8\u6536\u76ca\u65b9\u5411<\/h2>\n<h3 dir=\"auto\">\u6700\u9ad8\u6536\u76ca\uff08\u5fc5\u987b\u5148\u505a\uff09<\/h3>\n<ol dir=\"auto\">\n<li><strong>\u5b9a\u4f4d\u5185\u5b58\u6cc4\u6f0f\u4e0e\u9a7b\u7559\u5927\u6237<\/strong>\n<ul dir=\"auto\">\n<li>ps -eo pid,rss,vsz,cmd --sort=-rss | head -20\uff08RSS \u5e38\u9a7b\u5185\u5b58\u6392\u5e8f\uff09<\/li>\n<li>smem -t -k \u6216 smem -t -k -u\uff08\u66f4\u51c6\u786e\u7684\u7528\u6237\/\u8fdb\u7a0b\u5185\u5b58\u7edf\u8ba1\uff09<\/li>\n<li>Java\uff1ajmap -histo\u3001jstat -gcutil\u3001VisualVM\u3001jcmd GC.heap_dump<\/li>\n<li>Redis\uff1aINFO memory\uff0c\u68c0\u67e5 used_memory \u4e0e maxmemory<\/li>\n<li>MySQL\uff1aSHOW GLOBAL STATUS LIKE 'Innodb_buffer_pool_pages_%'<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u5408\u7406\u8bbe\u7f6e\u8fdb\u7a0b\u5185\u5b58\u4e0a\u9650<\/strong>\n<ul dir=\"auto\">\n<li>cgroup v2\uff1asystemd \u6216 docker compose \u4e2d MemoryMax<\/li>\n<li>ulimit -v\uff08\u865a\u62df\u5185\u5b58\u9650\u5236\uff09<\/li>\n<li>Java\uff1a-Xmx &lt; \u7269\u7406\u5185\u5b58\u7684 50\u201375%\uff08\u7559\u7ed9 page cache\uff09<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u5173\u95ed\u6216\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u5e38\u9a7b\u670d\u52a1<\/strong>\n<ul dir=\"auto\">\n<li>\u5173\u95ed\u900f\u660e\u5927\u9875\uff08transparent hugepage = never\/madvise\uff0c\u6570\u636e\u5e93\/Redis \u63a8\u8350\uff09<\/li>\n<li>\u9650\u5236 slab \u7f13\u5b58\u81a8\u80c0\uff08slabtop \u67e5\u770b\uff0c\u5fc5\u8981\u65f6 echo 3 &gt; \/proc\/sys\/vm\/drop_caches \u4e34\u65f6\u6e05\u7406\uff09<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h3 dir=\"auto\">\u4e2d\u7b49\u6536\u76ca\uff08\u573a\u666f\u4f9d\u8d56\uff09<\/h3>\n<ol dir=\"auto\" start=\"4\">\n<li><strong>\u8c03\u6574 swappiness \u4e0e\u810f\u9875\u56de\u5199<\/strong>\n<ul dir=\"auto\">\n<li>vm.swappiness = 1\u201310\uff08\u670d\u52a1\u5668\u51e0\u4e4e\u4e0d\u5efa\u8bae\u6362\u51fa\u533f\u540d\u9875\uff09<\/li>\n<li>vm.dirty_ratio = 5\u201310%\uff08\u51cf\u5c11\u810f\u9875\u5806\u79ef\uff09<\/li>\n<li>vm.dirty_background_ratio = 2\u20135%\uff08\u540e\u53f0\u5f00\u59cb\u56de\u5199\uff09<\/li>\n<\/ul>\n<\/li>\n<li><strong>NUMA \u4f18\u5316\uff08\u591a\u8def\u670d\u52a1\u5668\uff09<\/strong>\n<ul dir=\"auto\">\n<li>numactl --cpunodebind=0 --membind=0 \u7ed1\u5b9a\u8fdb\u7a0b\u5230\u540c\u4e00 NUMA \u8282\u70b9<\/li>\n<li>\u907f\u514d\u8de8 NUMA \u8bbf\u95ee\u5185\u5b58\uff08\u5ef6\u8fdf\u589e\u52a0 1.5\u20132 \u500d\uff09<\/li>\n<\/ul>\n<\/li>\n<li><strong>zram \/ zswap \u4f5c\u4e3a swap \u52a0\u901f<\/strong>\n<ul dir=\"auto\">\n<li>\u5c0f\u5185\u5b58\u670d\u52a1\u5668\uff08&lt; 32GB\uff09\u63a8\u8350\u5f00\u542f zram\uff08\u538b\u7f29 swap \u5728\u5185\u5b58\u4e2d\uff09<\/li>\n<li>\u6bd4\u4f20\u7edf swap \u5ef6\u8fdf\u4f4e 5\u201310 \u500d<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h3 dir=\"auto\">\u4f4e\u6536\u76ca\u4f46\u5e38\u88ab\u8bef\u8c03\u7684\u53c2\u6570\uff08\u614e\u7528\uff09<\/h3>\n<ul dir=\"auto\">\n<li>vm.overcommit_memory = 1\uff08\u8fc7\u5ea6\u63d0\u4ea4\uff0c\u98ce\u9669\u9ad8\uff09<\/li>\n<li>vm.min_free_kbytes \u8fc7\u5927\uff08\u62a2\u5360\u592a\u591a page cache\uff09<\/li>\n<li>vm.zone_reclaim_mode = 1\uff08NUMA \u573a\u666f\u53ef\u80fd\u9002\u5f97\u5176\u53cd\uff09<\/li>\n<\/ul>\n<h2 dir=\"auto\">\u56db\u3001\u76d1\u63a7\u4e0e\u544a\u8b66\u5efa\u8bae\uff08\u751f\u4ea7\u5fc5\u5907\uff09<\/h2>\n<p dir=\"auto\">\u5fc5\u987b\u76d1\u63a7\u7684\u6307\u6807\uff1a<\/p>\n<ul dir=\"auto\">\n<li>MemAvailable \/ MemTotal &lt; 15% \u2192 warning<\/li>\n<li>SwapUsed &gt; 5% \u6216 si\/so &gt; 100KB\/s \u2192 critical<\/li>\n<li>kswapd0 CPU &gt; 10% \u6301\u7eed 5 \u5206\u949f \u2192 warning<\/li>\n<li>OOM killer \u89e6\u53d1\uff08dmesg\/journalctl \u5173\u952e\u5b57\uff09\u2192 critical<\/li>\n<li>\u8fdb\u7a0b RSS \u589e\u957f\u8d8b\u52bf\uff08prometheus process exporter\uff09<\/li>\n<\/ul>\n<h2 dir=\"auto\">\u4e94\u3001\u603b\u7ed3\uff1a\u5185\u5b58\u8c03\u4f18\u7684\u5206\u5c42\u4f18\u5148\u7ea7<\/h2>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<div dir=\"auto\">\n<div><\/div>\n<table dir=\"auto\">\n<thead>\n<tr>\n<th data-col-size=\"xl\">\u4f18\u5316\u5c42\u7ea7<\/th>\n<th data-col-size=\"lg\">\u5178\u578b\u6536\u76ca\u5e45\u5ea6<\/th>\n<th data-col-size=\"sm\">\u4f18\u5148\u7ea7<\/th>\n<th data-col-size=\"sm\">\u5907\u6ce8<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-col-size=\"xl\">\u5b9a\u4f4d\u6cc4\u6f0f\u4e0e\u9a7b\u7559\u5927\u6237<\/td>\n<td data-col-size=\"lg\">30%\u2013\u221e<\/td>\n<td data-col-size=\"sm\">\u2605\u2605\u2605\u2605\u2605<\/td>\n<td data-col-size=\"sm\">\u5fc5\u987b\u5148\u505a<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xl\">\u8fdb\u7a0b\u5185\u5b58\u4e0a\u9650\u4e0e cgroup<\/td>\n<td data-col-size=\"lg\">20%\u201380%<\/td>\n<td data-col-size=\"sm\">\u2605\u2605\u2605\u2605\u2606<\/td>\n<td data-col-size=\"sm\">\u5fc5\u987b\u505a<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xl\">\u5173\u95ed\u900f\u660e\u5927\u9875\u3001\u8c03 swappiness<\/td>\n<td data-col-size=\"lg\">10%\u201350%<\/td>\n<td data-col-size=\"sm\">\u2605\u2605\u2605\u2605\u2606<\/td>\n<td data-col-size=\"sm\">\u6570\u636e\u5e93\/Redis \u5fc5\u505a<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xl\">NUMA \u7ed1\u6838\u4e0e\u5185\u5b58\u8282\u70b9<\/td>\n<td data-col-size=\"lg\">5%\u201340%<\/td>\n<td data-col-size=\"sm\">\u2605\u2605\u2605\u2606\u2606<\/td>\n<td data-col-size=\"sm\">\u591a\u8def\u670d\u52a1\u5668<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xl\">zram\/zswap \u542f\u7528<\/td>\n<td data-col-size=\"lg\">10%\u201360%\uff08\u5c0f\u5185\u5b58\uff09<\/td>\n<td data-col-size=\"sm\">\u2605\u2605\u2605\u2606\u2606<\/td>\n<td data-col-size=\"sm\">\u5185\u5b58\u7d27\u5f20\u65f6<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xl\">vm.dirty_ratio \u7b49\u5fae\u8c03<\/td>\n<td data-col-size=\"lg\">0%\u201320%<\/td>\n<td data-col-size=\"sm\">\u2605\u2605\u2606\u2606\u2606<\/td>\n<td data-col-size=\"sm\">\u614e\u8c03<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div><\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\"><strong>\u4e00\u53e5\u8bdd\u603b\u7ed3<\/strong>\uff1a <strong>\u5185\u5b58\u8c03\u4f18\u7684\u6838\u5fc3\u4e0d\u662f\u201c\u8ba9 free \u53d8\u5927\u201d\uff0c\u800c\u662f\u201c\u8ba9 available \u4fdd\u6301\u5145\u8db3\uff0c\u540c\u65f6\u8ba9 page cache \u5c3d\u53ef\u80fd\u591a\u5730\u53d1\u6325\u4f5c\u7528\u201d<\/strong>\u3002<\/p>\n<p dir=\"auto\">\u5148\u7528 free -h\u3001vmstat\u3001slabtop\u3001ps -eo rss \u770b\u6e05\u695a\u8c01\u5728\u5403\u5185\u5b58\uff0c\u518d\u51b3\u5b9a\u662f\u6740\u8fdb\u7a0b\u3001\u52a0\u5185\u5b58\u3001\u8c03\u53c2\u6570\u8fd8\u662f\u4f18\u5316\u4ee3\u7801\u3002 \u628a\u65f6\u95f4\u82b1\u5728\u5b9a\u4f4d\u5185\u5b58\u5927\u6237\u548c\u8bbe\u7f6e\u5408\u7406\u7684 cgroup \u9650\u5236\u4e0a\uff0c\u8fdc\u6bd4\u76f2\u76ee\u6539 swappiness \u6216 drop_caches \u6709\u6548\u5f97\u591a\u3002<\/p>\n<p dir=\"auto\">\u5982\u679c\u4f60\u5f53\u524d\u670d\u52a1\u5668\u5185\u5b58\u538b\u529b\u5927\uff0c\u6b22\u8fce\u63d0\u4f9b free -h\u3001vmstat 1 5\u3001top \u622a\u56fe\u6216 slabtop \u8f93\u51fa\uff0c\u6211\u53ef\u4ee5\u5e2e\u4f60\u5feb\u901f\u5206\u6790\u6700\u53ef\u80fd\u7684\u74f6\u9888\u70b9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Linux \u5185\u5b58\u7ba1\u7406\u662f\u670d\u52a1\u5668\u8fd0\u7ef4\u4e2d\u6700\u5bb9\u6613\u88ab\u8bef\u89e3\u3001\u4e5f\u6700\u5bb9\u6613\u5bfc\u81f4\u4e25\u91cd\u6545\u969c\u7684\u9886\u57df\u4e4b\u4e00\u3002 \u5f88\u591a\u4eba\u770b\u5230 free -h  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[],"class_list":["post-442431","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/442431","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=442431"}],"version-history":[{"count":1,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/442431\/revisions"}],"predecessor-version":[{"id":442432,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/442431\/revisions\/442432"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=442431"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=442431"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=442431"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}