{"id":28402,"date":"2025-12-10T14:47:51","date_gmt":"2025-12-10T06:47:51","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-cn\/how-to-clear-linux-cache-on-us-servers\/"},"modified":"2025-12-10T14:52:20","modified_gmt":"2025-12-10T06:52:20","slug":"how-to-clear-linux-cache-on-us-servers","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-cn\/blog\/how-to-clear-linux-cache-on-us-servers\/","title":{"rendered":"\u5982\u4f55\u5728Linux\u7cfb\u7edf\u4e0a\u6e05\u7406\u7f8e\u56fd\u670d\u52a1\u5668\u7f13\u5b58\uff1f"},"content":{"rendered":"\n<p>\u5bf9\u4e8e\u8fd0\u7ef4<a href=\"https:\/\/www.varidata.com\/zh-cn\/blog\/multi-layer-defense-security-strategies-on-us-linux-servers\/\" target=\"_blank\">\u7f8e\u56fdLinux\u670d\u52a1\u5668<\/a>\u7684\u7ba1\u7406\u5458\u800c\u8a00\u2014\u2014\u65e0\u8bba\u662f\u7ba1\u7406\u670d\u52a1\u5668\u79df\u7528\u5e73\u53f0\u3001\u670d\u52a1\u5668\u6258\u7ba1\u90e8\u7f72\u67b6\u6784\uff0c\u8fd8\u662f\u4e91\u5b9e\u4f8b\u2014\u2014\u5185\u5b58\u7ba1\u7406\u90fd\u662f\u6027\u80fd\u8c03\u4f18\u4e2d\u81f3\u5173\u91cd\u8981\u5374\u5e38\u88ab\u8bef\u89e3\u7684\u6838\u5fc3\u73af\u8282\u3002\u5f53\u9875\u7f13\u5b58\u3001\u76ee\u5f55\/\u7d22\u5f15\u8282\u70b9\u7f13\u5b58\u6216\u4ea4\u6362\u7f13\u5b58\u65e0\u8282\u5236\u5806\u79ef\u65f6\uff0c\u4f1a\u62d6\u6162\u8de8\u6d32\u8bbf\u95ee\u901f\u5ea6\u3001\u9020\u6210IO\u74f6\u9888\uff0c\u8fd8\u4f1a\u964d\u4f4e\u6838\u5fc3\u4e1a\u52a1\u5e94\u7528\u7684\u54cd\u5e94\u6548\u7387\u3002\u672c\u6307\u5357\u6df1\u5165\u5256\u6790Linux\u4e34\u65f6\u6570\u636e\u5b58\u50a8\u673a\u5236\u7684\u6280\u672f\u539f\u7406\uff0c\u7ed3\u5408<a href=\"https:\/\/www.varidata.com\/zh-cn\/server\/los-angeles\/\" target=\"_blank\">\u7f8e\u56fd\u670d\u52a1\u5668<\/a>\u7684\u72ec\u7279\u573a\u666f\u9700\u6c42\uff08\u5982\u8de8\u6d0b\u6570\u636e\u4f20\u8f93\u30017\u00d724\u5c0f\u65f6\u4e0d\u95f4\u65ad\u8fd0\u884c\uff09\uff0c\u63d0\u4f9b\u7ecf\u6781\u5ba2\u9a8c\u8bc1\u7684\u53ef\u843d\u5730\u65b9\u6cd5\uff0c\u5e2e\u52a9\u4f60\u5b89\u5168\u6e05\u7406\u5197\u4f59\u5185\u5b58\u5c42\uff0c\u540c\u65f6\u4f18\u5316\u7cfb\u7edf\u957f\u671f\u8fd0\u884c\u6548\u7387\u3002<\/p>\n<h2><strong>\u4e00\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u573a\u666f\u4e0bLinux\u4e34\u65f6\u6570\u636e\u5c42\u7684\u5de5\u4f5c\u903b\u8f91<\/strong><\/h2>\n<p>\u5728\u7740\u624b\u6e05\u7406\u64cd\u4f5c\u524d\uff0c\u9996\u5148\u8981\u7406\u89e3Linux\u7684\u4e34\u65f6\u6570\u636e\u5b58\u50a8\u673a\u5236\uff0c\u4ee5\u53ca\u4e3a\u4f55\u7f8e\u56fd\u670d\u52a1\u5668\u73af\u5883\u4f1a\u653e\u5927\u5176\u5f71\u54cd\uff1a<\/p>\n<ul>\n<li><strong>\u6838\u5fc3\u673a\u5236<\/strong>\uff1aLinux\u4e3b\u8981\u4f9d\u8d56\u4e09\u5c42\u5185\u5b58\u5b58\u50a8\u7ed3\u6784\u2014\u2014\u9875\u7f13\u5b58\uff08\u7528\u4e8e\u6587\u4ef6\u7cfb\u7edf\u6570\u636e\uff09\u3001\u76ee\u5f55\/\u7d22\u5f15\u8282\u70b9\u7f13\u5b58\uff08\u7528\u4e8e\u76ee\u5f55\u7ed3\u6784\/\u5143\u6570\u636e\uff09\u3001\u4ea4\u6362\u7f13\u5b58\u533a\uff08\u7528\u4e8e\u9ad8\u9891\u8bbf\u95ee\u7684\u4ea4\u6362\u5206\u533a\u6570\u636e\uff09\u2014\u2014\u4ee5\u6b64\u51cf\u5c11\u78c1\u76d8IO\u5e76\u52a0\u901f\u91cd\u590d\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u7f8e\u56fd\u670d\u52a1\u5668\u7279\u6027<\/strong>\uff1a\u8de8\u5927\u897f\u6d0b\/\u592a\u5e73\u6d0b\u7684\u6570\u636e\u4f20\u8f93\u672c\u8eab\u5b58\u5728\u56fa\u6709\u5ef6\u8fdf\uff0c\u800c\u4f4e\u6548\u7684\u4e34\u65f6\u6570\u636e\u5b58\u50a8\u4f1a\u8feb\u4f7f\u7cfb\u7edf\u4ece\u78c1\u76d8\u91cd\u65b0\u8bfb\u53d6\u6570\u636e\uff0c\u800c\u975e\u5229\u7528\u9ad8\u901f\u5185\u5b58\uff0c\u8fdb\u4e00\u6b65\u52a0\u5267\u5ef6\u8fdf\u3002\u5bf9\u4e8e\u9ad8\u5e76\u53d1\u573a\u666f\uff08\u5982\u5168\u7403API\u3001\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\uff0c\u9884\u52a0\u8f7d\u7684\u6570\u636e\u76f4\u63a5\u51b3\u5b9a\u7ec8\u7aef\u7528\u6237\u4f53\u9a8c\u3002<\/li>\n<li><strong>\u5185\u5b58\u81a8\u80c0\u7684\u5371\u5bb3<\/strong>\uff1a\u5f53\u4e34\u65f6\u5185\u5b58\u5360\u7528\u8d85\u8fc7\u53ef\u7528\u5185\u5b58\u768470%\u65f6\uff0cLinux\u53ef\u80fd\u4f1a\u5c06\u5e94\u7528\u6570\u636e\u7f6e\u6362\u5230\u78c1\u76d8\uff0c\u5bfc\u81f4\u7cfb\u7edf\u54cd\u5e94\u53d8\u6162\uff0c\u4e14\u8fd9\u79cd\u5361\u987f\u5728\u6d77\u5916\u8bbf\u95ee\u573a\u666f\u4e2d\u4f1a\u88ab\u8fdb\u4e00\u6b65\u653e\u5927\u3002\u4f46\u76f2\u76ee\u6e05\u7406\u8fd9\u4e9b\u5b58\u50a8\u5c42\u4f1a\u4e27\u5931\u5176\u6027\u80fd\u4f18\u52bf\u2014\u2014\u627e\u5230\u5e73\u8861\u624d\u662f\u5173\u952e\u3002<\/li>\n<\/ul>\n<h2><strong>\u4e8c\u3001\u8bca\u65ad\u5185\u5b58\u81a8\u80c0\uff1a\u6781\u5ba2\u7ea7\u76d1\u63a7\u5de5\u5177<\/strong><\/h2>\n<p>\u5728\u6e05\u7406\u5197\u4f59\u5185\u5b58\u5c42\u524d\uff0c\u9700\u901a\u8fc7\u4ee5\u4e0b\u6280\u672f\u76d1\u63a7\u5de5\u5177\u786e\u8ba4\u5176\u4e3a\u6027\u80fd\u74f6\u9888\u2014\u2014\u8fd9\u662f\u7f8e\u56fd\u670d\u52a1\u5668\u7ba1\u7406\u5458\u5b9e\u73b0\u7cbe\u51c6\u8fd0\u7ef4\u7684\u6838\u5fc3\uff1a<\/p>\n<ol>\n<li><strong>\u5185\u5b58\u4e0e\u5b58\u50a8\u5feb\u901f\u5feb\u7167<\/strong>\uff1a\u4f7f\u7528<code>free -h<\/code>\u67e5\u770b\u603b\u5185\u5b58\u3001\u5df2\u7528\u5185\u5b58\u3001\u7a7a\u95f2\u5185\u5b58\u548c\u4e34\u65f6\u5b58\u50a8\u5185\u5b58\u3002\u91cd\u70b9\u5173\u6ce8\u201ccached\u201d\u5b57\u6bb5\uff08\u6574\u5408\u9875\u7f13\u5b58\u4e0e\u76ee\u5f55\/\u7d22\u5f15\u8282\u70b9\u7f13\u5b58\uff09\u548c\u201cavailable\u201d\u5b57\u6bb5\uff08\u5e94\u7528\u53ef\u8c03\u7528\u7684\u5185\u5b58\uff09\u3002<\/li>\n<li><strong>\u901a\u8fc7\/proc\/meminfo\u6df1\u5ea6\u5206\u6790<\/strong>\uff1a\u6267\u884c<code>cat \/proc\/meminfo<\/code>\u83b7\u53d6\u7cbe\u7ec6\u5316\u6570\u636e\uff1a\n<ul>\n<li><code>Cached<\/code>\uff1a\u9875\u7f13\u5b58\u5927\u5c0f\uff08\u6587\u4ef6\u7cfb\u7edf\u6570\u636e\uff09<\/li>\n<li><code>Buffers<\/code>\uff1a\u78c1\u76d8\u5199\u5165\u64cd\u4f5c\u7684\u4e34\u65f6\u5b58\u50a8\u533a<\/li>\n<li><code>SReclaimable<\/code>\uff1aSlab\u5206\u914d\u5668\u9884\u7559\u7a7a\u95f4\uff08\u53ef\u56de\u6536\u7684\u76ee\u5f55\/\u7d22\u5f15\u8282\u70b9\u6570\u636e\uff09<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u8fdb\u7a0b\u7ea7\u5185\u5b58\u5206\u6790<\/strong>\uff1a\u7ed3\u5408<code>top<\/code>\u6216<code>htop<\/code>\u4e0e<code>smem -t -k<\/code>\uff0c\u5b9a\u4f4d\u5360\u7528\u5927\u91cf\u4e34\u65f6\u6570\u636e\u7684\u8fdb\u7a0b\uff08\u91cd\u70b9\u5173\u6ce8\u4e0e\u6587\u4ef6\u5bc6\u96c6\u578b\u5de5\u4f5c\u8d1f\u8f7d\u76f8\u5173\u7684\u9ad8\u201cRSS\u201d\u6216\u201cPSS\u201d\u503c\uff09\u3002<\/li>\n<li><strong>\u7f8e\u56fd\u670d\u52a1\u5668\u5ef6\u8fdf\u5173\u8054\u5206\u6790<\/strong>\uff1a\u5c06\u5185\u5b58\u76d1\u63a7\u4e0e<code>mtr<\/code>\uff08My Traceroute\uff09\u7ed3\u5408\uff0c\u786e\u8ba4\u4e34\u65f6\u5b58\u50a8\u5360\u7528\u8fc7\u9ad8\u662f\u5426\u4e0e\u6d77\u5916ping\u503c\u4e0a\u5347\u540c\u6b65\u2014\u2014\u8fd9\u662f\u5224\u65ad\u5185\u5b58\u81a8\u80c0\u5f71\u54cd\u7528\u6237\u4f53\u9a8c\u7684\u5173\u952e\u4f9d\u636e\u3002<\/li>\n<\/ol>\n<h2><strong>\u4e09\u3001\u4fdd\u969c\u7f8e\u56fd\u670d\u52a1\u5668\u7a33\u5b9a\u6027\u7684\u5b89\u5168\u6e05\u7406\u65b9\u6cd5<\/strong><\/h2>\n<p>Linux\u5185\u6838\u8bbe\u8ba1\u652f\u6301\u9009\u62e9\u6027\u6e05\u7406\u4e34\u65f6\u5185\u5b58\u5c42\uff0c\u53ef\u6839\u636e\u7f8e\u56fd\u670d\u52a1\u5668\u7684\u5de5\u4f5c\u8d1f\u8f7d\uff08\u670d\u52a1\u5668\u79df\u7528\u3001\u670d\u52a1\u5668\u6258\u7ba1\u3001\u4e91\u5b9e\u4f8b\uff09\u548c\u8fd0\u884c\u65f6\u957f\u9700\u6c42\u9009\u62e9\u5bf9\u5e94\u65b9\u5f0f\uff1a<\/p>\n<h3>3.1 \u4e34\u65f6\u6e05\u7406\uff08\u65e0\u9700\u91cd\u542f\uff09<\/h3>\n<p>\u4f7f\u7528\u4ee5\u4e0bsysctl\u547d\u4ee4\u6e05\u7406\u5197\u4f59\u5c42\uff0c\u4e14\u65e0\u9700\u91cd\u542f\u670d\u52a1\u2014\u2014\u9002\u5408\u4f4e\u6d41\u91cf\u65f6\u6bb5\u64cd\u4f5c\uff08\u5982\u7f8e\u56fd\u670d\u52a1\u5668\u7684UTC\u65f6\u95f40-4\u70b9\uff09\uff1a<\/p>\n<ul>\n<li><strong>\u4ec5\u6e05\u7406\u9875\u7f13\u5b58<\/strong>\uff1a<code>sync; echo 1 &gt; \/proc\/sys\/vm\/drop_caches<\/code>\n<p>\u4e3a\u4f55\u8981\u6267\u884c<code>sync<\/code>\uff1f\u8be5\u547d\u4ee4\u4f1a\u5237\u65b0\u5f85\u5199\u5165\u78c1\u76d8\u7684\u6570\u636e\uff0c\u907f\u514d\u6570\u636e\u4e22\u5931\u2014\u2014\u8fd9\u662f\u7f8e\u56fd\u751f\u4ea7\u73af\u5883\u670d\u52a1\u5668\u7684\u5fc5\u64cd\u4f5c\u3002<\/p>\n<\/li>\n<li><strong>\u6e05\u7406\u76ee\u5f55\/\u7d22\u5f15\u8282\u70b9\u7f13\u5b58<\/strong>\uff1a<code>sync; echo 2 &gt; \/proc\/sys\/vm\/drop_caches<\/code>\n<p>\u9002\u7528\u4e8e\u6587\u4ef6\u7cfb\u7edf\u64cd\u4f5c\u9891\u7e41\u7684\u573a\u666f\uff08\u5982\u5305\u542b\u5927\u91cf\u7528\u6237\u76ee\u5f55\u7684\u670d\u52a1\u5668\u79df\u7528\u5e73\u53f0\uff09\u3002<\/p>\n<\/li>\n<li><strong>\u6e05\u7406\u6240\u6709\u5185\u5b58\u5c42<\/strong>\uff1a<code>sync; echo 3 &gt; \/proc\/sys\/vm\/drop_caches<\/code>\n<p>\u4ec5\u5728\u5185\u5b58\u4e25\u91cd\u81a8\u80c0\u65f6\u4f7f\u7528\u2014\u2014\u907f\u514d\u5728\u7f8e\u56fd\u670d\u52a1\u5668\u9ad8\u5cf0\u6d41\u91cf\u671f\uff08\u5982\u5317\u7f8e\u5de5\u4f5c\u65f6\u6bb5\uff09\u6267\u884c\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>3.2 \u501f\u52a9Cron\u5b9e\u73b0\u81ea\u52a8\u5316\u6e05\u7406\uff08\u6781\u5ba2\u7684\u201c\u61d2\u4eba\u65b9\u6848\u201d\uff09<\/h3>\n<p>\u5bf9\u4e8e7\u00d724\u5c0f\u65f6\u8fd0\u884c\u7684\u7f8e\u56fd\u670d\u52a1\u5668\uff0c\u53ef\u901a\u8fc7\u9608\u503c\u89e6\u53d1\u811a\u672c\u5b9e\u73b0\u81ea\u52a8\u5316\u6e05\u7406\u2014\u2014\u65e0\u9700\u4eba\u5de5\u5e72\u9884\uff1a<\/p>\n<ol>\n<li>\u521b\u5efa\u811a\u672c\uff08\u793a\u4f8b\uff1a<code>\/usr\/local\/bin\/purge_temp_memory.sh<\/code>\uff09\uff0c\u5185\u5bb9\u5982\u4e0b\uff1a\n<pre><code>#!\/bin\/bash\r\nSTORAGE_THRESHOLD=70  # \u4e34\u65f6\u5c42\u5360\u7528\u5185\u5b58\u7684\u9608\u503c\u767e\u5206\u6bd4\r\nCURRENT_STORAGE=$(free | awk '\/Mem:\/ {print $6\/$2*100}' | cut -d. -f1)\r\n\r\nif [ \"$CURRENT_STORAGE\" -ge \"$STORAGE_THRESHOLD\" ]; then\r\n    sync\r\n    echo 3 &gt; \/proc\/sys\/vm\/drop_caches\r\n    logger \"Linux\u4e34\u65f6\u5185\u5b58\u5df2\u6e05\u7406 - \u9608\u503c$STORAGE_THRESHOLD%\u5df2\u8d85\u51fa\uff08\u5f53\u524d\uff1a$CURRENT_STORAGE%\uff09\"\r\nfi<\/code><\/pre>\n<\/li>\n<li>\u8d4b\u4e88\u6267\u884c\u6743\u9650\uff1a<code>chmod +x \/usr\/local\/bin\/purge_temp_memory.sh<\/code><\/li>\n<li>\u6dfb\u52a0\u81f3\u5b9a\u65f6\u4efb\u52a1\uff08UTC\u65f6\u95f4\u6bcf\u65e5\u51cc\u66682\u70b9\u6267\u884c\uff09\uff1a<code>0 2 * * * \/usr\/local\/bin\/purge_temp_memory.sh<\/code><\/li>\n<\/ol>\n<p>\u5b9e\u7528\u6280\u5de7\uff1a\u5bf9\u4e8e\u5b58\u50a8\u5927\u91cf\u6570\u636e\u96c6\u7684\u670d\u52a1\u5668\u6258\u7ba1\u7cfb\u7edf\uff0c\u53ef\u5c06\u9608\u503c\u8c03\u6574\u81f380%\u2014\u2014\u4fdd\u7559\u66f4\u591a\u9884\u52a0\u8f7d\u6570\u636e\u80fd\u51cf\u5c11\u91cd\u590d\u8bbf\u95ee\u65f6\u7684\u78c1\u76d8IO\u3002<\/p>\n<h3>3.3 \u5185\u6838\u8c03\u4f18\uff1a\u4ece\u6839\u6e90\u907f\u514d\u5185\u5b58\u81a8\u80c0<\/h3>\n<p>\u957f\u671f\u4f18\u5316\u8fdc\u6bd4\u624b\u52a8\u6e05\u7406\u66f4\u6709\u6548\u2014\u2014\u9488\u5bf9\u7f8e\u56fd\u670d\u52a1\u5668\u5de5\u4f5c\u8d1f\u8f7d\u8c03\u6574\u4ee5\u4e0b\u5185\u6838\u53c2\u6570\uff1a<\/p>\n<ul>\n<li><strong>vfs_cache_pressure<\/strong>\uff1a\u63a7\u5236\u7d22\u5f15\u8282\u70b9\/\u76ee\u5f55\u7f13\u5b58\u7684\u56de\u6536\u4f18\u5148\u7ea7\uff08\u9ed8\u8ba4\u503c\uff1a100\uff09\u3002\u5bf9\u4e8e\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u573a\u666f\uff1a<br \/>\n            <code>sysctl -w vm.vfs_cache_pressure=120<\/code>\uff08\u52a0\u5feb\u4e34\u65f6\u5c42\u56de\u6536\u901f\u5ea6\uff09<\/p>\n<p>\u5bf9\u4e8e\u5b58\u50a8\u9759\u6001\u6570\u636e\u7684\u670d\u52a1\u5668\u6258\u7ba1\u573a\u666f\uff1a<code>sysctl -w vm.vfs_cache_pressure=80<\/code>\uff08\u4fdd\u7559\u66f4\u591a\u9884\u52a0\u8f7d\u6570\u636e\uff09<\/p>\n<\/li>\n<li><strong>swappiness<\/strong>\uff1a\u964d\u4f4e\u4ea4\u6362\u5206\u533a\u4f7f\u7528\u7387\uff08\u9ed8\u8ba4\u503c\uff1a60\uff09\u3002\u5bf9\u4e8e\u5185\u5b58\u226516GB\u7684\u7f8e\u56fd\u670d\u52a1\u5668\uff1a<br \/>\n            <code>sysctl -w vm.swappiness=10<\/code>\uff08\u4f18\u5148\u4f7f\u7528\u7269\u7406\u5185\u5b58\u800c\u975e\u4ea4\u6362\u5206\u533a\uff09\n        <\/li>\n<li>\u4f7f\u4fee\u6539\u6c38\u4e45\u751f\u6548\uff1a\u5c06\u53c2\u6570\u6dfb\u52a0\u81f3<code>\/etc\/sysctl.conf<\/code>\uff0c\u5e76\u6267\u884c<code>sysctl -p<\/code>\u52a0\u8f7d\u914d\u7f6e\u3002<\/li>\n<\/ul>\n<h2><strong>\u56db\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u5185\u5b58\u4f18\u5316\uff1a\u5fc5\u987b\u89c4\u907f\u7684\u5173\u952e\u8bef\u533a<\/strong><\/h2>\n<p>\u8d44\u6df1\u6781\u5ba2\u7ba1\u7406\u5458\u90fd\u6e05\u695a\uff0c\u5185\u5b58\u7ba1\u7406\u7684\u6838\u5fc3\u4e0d\u4ec5\u662f\u6267\u884c\u547d\u4ee4\uff0c\u66f4\u8981\u89c4\u907f\u9519\u8bef\u64cd\u4f5c\u2014\u2014\u4ee5\u4e0b\u884c\u4e3a\u4f1a\u5371\u53ca\u7f8e\u56fd\u670d\u52a1\u5668\u7a33\u5b9a\u6027\uff1a<\/p>\n<ul>\n<li><strong>\u7981\u6b62\u9ad8\u9891\u6b21\u6e05\u7406<\/strong>\uff1a\u6bcf\u5c0f\u65f6\u6267\u884c<code>drop_caches<\/code>\u4f1a\u8feb\u4f7fLinux\u91cd\u65b0\u6784\u5efa\u4e34\u65f6\u5b58\u50a8\u5c42\uff0c\u5bfc\u81f4\u78c1\u76d8IO\u6fc0\u589e\uff0c\u52a0\u5267\u6d77\u5916\u8bbf\u95ee\u5ef6\u8fdf\u3002<\/li>\n<li><strong>\u5207\u52ff\u5b8c\u5168\u7981\u7528\u5b58\u50a8\u673a\u5236<\/strong>\uff1a\u5c06<code>vm.drop_caches<\/code>\u4fee\u6539\u4e3a0\u4f1a\u6c38\u4e45\u5173\u95ed\u4e34\u65f6\u6570\u636e\u7cfb\u7edf\u2014\u2014\u8fd9\u79cd\u65b0\u624b\u9519\u8bef\u4f1a\u4e25\u91cd\u635f\u5bb3\u6587\u4ef6\u5bc6\u96c6\u578b\u5de5\u4f5c\u8d1f\u8f7d\uff08\u5982\u670d\u52a1\u5668\u79df\u7528\uff09\u7684\u6027\u80fd\u3002<\/li>\n<li><strong>\u4e0d\u53ef\u5ffd\u89c6\u4ea4\u6362\u5206\u533a\u4f7f\u7528\u7387<\/strong>\uff1a\u82e5\u6e05\u7406\u64cd\u4f5c\u65e0\u6cd5\u964d\u4f4e\u4ea4\u6362\u5206\u533a\u6d3b\u52a8\uff0c\u8bf4\u660e\u7f8e\u56fd\u670d\u52a1\u5668\u914d\u7f6e\u4e0d\u8db3\u2014\u2014\u5e94\u5347\u7ea7\u5185\u5b58\uff0c\u800c\u975e\u4f9d\u8d56\u4e34\u65f6\u4fee\u590d\u65b9\u6848\u3002<\/li>\n<li><strong>\u907f\u5f00\u9ad8\u5cf0\u6d41\u91cf\u671f\u6e05\u7406<\/strong>\uff1a\u5bf9\u4e8e\u670d\u52a1\u5317\u7f8e\u7528\u6237\u7684\u7f8e\u56fd\u670d\u52a1\u5668\uff0c\u907f\u514d\u5728\u7f8e\u4e1c\u65f6\u95f4\u65e99\u70b9\u81f3\u665a5\u70b9\u6267\u884c\u5185\u5b58\u64cd\u4f5c\u2014\u2014\u8be5\u65f6\u6bb5\u6070\u9022\u6b27\u6d32\u3001\u4e9a\u6d32\u7684\u6d77\u5916\u8bbf\u95ee\u9ad8\u5cf0\u3002<\/li>\n<\/ul>\n<h2><strong>\u4e94\u3001\u8fdb\u9636\u6280\u5de7\uff1a\u7f8e\u56fd\u670d\u52a1\u5668\u5185\u5b58\u4e0e\u6027\u80fd\u534f\u540c\u4f18\u5316<\/strong><\/h2>\n<p>\u7ed3\u5408\u4ee5\u4e0b\u6781\u5ba2\u7ea7\u7b56\u7565\uff0c\u5c06\u7f8e\u56fd\u670d\u52a1\u5668\u7684\u4f18\u5316\u6548\u679c\u6700\u5927\u5316\uff1a<\/p>\n<ul>\n<li><strong>\u5185\u5b58+CDN\u8054\u52a8<\/strong>\uff1a\u5c06Linux\u8c03\u4f18\u4e0e\u5168\u7403CDN\u7ed3\u5408\u2014\u2014\u628a\u9759\u6001\u5185\u5bb9\u5378\u8f7d\u81f3\u8fb9\u7f18\u8282\u70b9\uff0c\u964d\u4f4e\u7f8e\u56fd\u6e90\u7ad9\u7684\u4e34\u65f6\u5b58\u50a8\u538b\u529b\u3002<\/li>\n<li><strong>\u76d1\u63a7\u544a\u8b66\u914d\u7f6e<\/strong>\uff1a\u642d\u5efaPrometheus + Grafana\u4eea\u8868\u76d8\uff0c\u76d1\u63a7<code>Cached<\/code>\u6570\u503c\u5e76\u8bbe\u7f6e\u9608\u503c\u544a\u8b66\u2014\u2014\u8fd9\u5bf9\u65e0\u6258\u7ba1\u652f\u6301\u7684\u670d\u52a1\u5668\u6258\u7ba1\u573a\u666f\u81f3\u5173\u91cd\u8981\u3002<\/li>\n<li><strong>\u5185\u5b58\u4e0e\u5b58\u50a8\u6743\u8861<\/strong>\uff1a\u5bf9\u4e8e\u5185\u5b58&lt;8GB\u7684\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u573a\u666f\uff0c\u53ef\u5c06<code>vfs_cache_pressure<\/code>\u8c03\u4f4e\u81f3150\uff0c\u4f18\u5148\u4fdd\u969c\u6570\u636e\u5e93\/API\u7684\u5185\u5b58\u5360\u7528\uff0c\u540c\u65f6\u4ecd\u5229\u7528\u9884\u52a0\u8f7d\u6570\u636e\u63d0\u5347\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2><strong>\u516d\u3001\u603b\u7ed3\uff1a\u6781\u5ba2\u7684\u5185\u5b58\u7ba1\u7406\u51c6\u5219<\/strong><\/h2>\n<p>\u7f8e\u56fd\u670d\u52a1\u5668\u7684Linux\u7f13\u5b58\u6e05\u7406\u6838\u5fc3\u5e76\u975e\u201c\u91ca\u653e\u5185\u5b58\u201d\uff0c\u800c\u662f\u5e73\u8861\u6027\u80fd\u3001\u7a33\u5b9a\u6027\u4e0e\u6d77\u5916\u7528\u6237\u4f53\u9a8c\u3002\u901a\u8fc7\u6280\u672f\u5de5\u5177\u8bca\u65ad\u5185\u5b58\u81a8\u80c0\u3001\u91c7\u7528\u9488\u5bf9\u6027\u6e05\u7406\u65b9\u6cd5\u3001\u7ed3\u5408\u5de5\u4f5c\u8d1f\u8f7d\uff08\u670d\u52a1\u5668\u79df\u7528\/\u6258\u7ba1\/\u4e91\uff09\u8c03\u4f18\u5185\u6838\uff0c\u53ef\u964d\u4f4e20%-30%\u7684\u8bbf\u95ee\u5ef6\u8fdf\uff0c\u4fdd\u969c\u6838\u5fc3\u5e94\u7528\u7a33\u5b9a\u8fd0\u884c\u3002\u8bb0\u4f4f\uff1a\u4e34\u65f6\u6570\u636e\u7cfb\u7edf\u662fLinux\u7684\u4f18\u52bf\u7279\u6027\uff0c\u800c\u975e\u7f3a\u9677\u2014\u2014\u8981\u4f18\u5316\u800c\u975e\u5e9f\u9664\u3002\u638c\u63e1\u8fd9\u4e9b\u6280\u5de7\uff0c\u80fd\u8ba9\u7f8e\u56fd\u670d\u52a1\u5668\u7ba1\u7406\u5458\u5c06\u5185\u5b58\u4ece\u9690\u85cf\u74f6\u9888\u8f6c\u5316\u4e3a\u670d\u52a1\u5168\u7403\u7528\u6237\u7684\u7ade\u4e89\u4f18\u52bf\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5bf9\u4e8e\u8fd0\u7ef4\u7f8e\u56fdLinux\u670d\u52a1\u5668\u7684\u7ba1\u7406\u5458\u800c\u8a00\u2014\u2014\u65e0\u8bba\u662f\u7ba1\u7406\u670d\u52a1\u5668\u79df\u7528\u5e73\u53f0\u3001\u670d\u52a1\u5668\u6258\u7ba1\u90e8\u7f72\u67b6\u6784\uff0c\u8fd8\u662f\u4e91\u5b9e\u4f8b\u2014\u2014\u5185\u5b58\u7ba1\u7406\u90fd\u662f\u6027\u80fd\u8c03\u4f18\u4e2d\u81f3\u5173\u91cd\u8981\u5374\u5e38\u88ab\u8bef\u89e3\u7684\u6838\u5fc3\u73af\u8282\u3002\u5f53\u9875\u7f13\u5b58\u3001\u76ee\u5f55\/\u7d22\u5f15\u8282\u70b9\u7f13\u5b58\u6216\u4ea4\u6362\u7f13\u5b58\u65e0\u8282\u5236\u5806\u79ef\u65f6\uff0c\u4f1a\u62d6\u6162\u8de8\u6d32\u8bbf\u95ee\u901f\u5ea6\u3001\u9020\u6210IO\u74f6\u9888\uff0c\u8fd8\u4f1a\u964d\u4f4e\u6838\u5fc3\u4e1a\u52a1\u5e94\u7528\u7684\u54cd\u5e94\u6548\u7387\u3002\u672c\u6307\u5357\u6df1\u5165\u5256\u6790Linux\u4e34\u65f6\u6570\u636e\u5b58\u50a8\u673a\u5236\u7684\u6280\u672f\u539f\u7406\uff0c\u7ed3\u5408\u7f8e\u56fd\u670d\u52a1\u5668\u7684\u72ec\u7279\u573a\u666f\u9700\u6c42\uff08\u5982\u8de8\u6d0b\u6570\u636e\u4f20\u8f93\u30017\u00d724\u5c0f\u65f6\u4e0d\u95f4\u65ad\u8fd0\u884c\uff09\uff0c\u63d0\u4f9b\u7ecf\u6781\u5ba2\u9a8c\u8bc1\u7684\u53ef\u843d\u5730\u65b9\u6cd5\uff0c\u5e2e\u52a9\u4f60\u5b89\u5168\u6e05\u7406\u5197\u4f59\u5185\u5b58\u5c42\uff0c\u540c\u65f6\u4f18\u5316\u7cfb\u7edf\u957f\u671f\u8fd0\u884c\u6548\u7387\u3002 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