{"id":28403,"date":"2025-12-10T14:47:51","date_gmt":"2025-12-10T06:47:51","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-tw\/how-to-clear-linux-cache-on-us-servers\/"},"modified":"2025-12-10T14:54:34","modified_gmt":"2025-12-10T06:54:34","slug":"how-to-clear-linux-cache-on-us-servers","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/how-to-clear-linux-cache-on-us-servers\/","title":{"rendered":"\u5982\u4f55\u5728Linux\u7cfb\u7d71\u4e0a\u6e05\u7406\u7f8e\u570b\u4f3a\u670d\u5668\u5feb\u53d6?"},"content":{"rendered":"\n<p>\u5c0d\u65bc\u7dad\u904b<a href=\"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/multi-layer-defense-security-strategies-on-us-linux-servers\/\" target=\"_blank\">\u7f8e\u570bLinux\u4f3a\u670d\u5668<\/a>\u7684\u7ba1\u7406\u54e1\u800c\u8a00\u2014\u2014\u7121\u8ad6\u662f\u7ba1\u7406\u4f3a\u670d\u5668\u79df\u7528\u5e73\u53f0\u3001\u4f3a\u670d\u5668\u6258\u7ba1\u90e8\u7f72\u67b6\u69cb\uff0c\u9084\u662f\u96f2\u7aef\u57f7\u884c\u500b\u9ad4\u2014\u2014\u8a18\u61b6\u9ad4\u7ba1\u7406\u90fd\u662f\u6548\u80fd\u8abf\u6821\u4e2d\u81f3\u95dc\u91cd\u8981\u537b\u5e38\u88ab\u8aa4\u89e3\u7684\u6838\u5fc3\u74b0\u7bc0\u3002\u7576\u9801\u5feb\u53d6\u3001\u76ee\u9304\/\u7d22\u5f15\u7bc0\u9ede\u5feb\u53d6\u6216\u4ea4\u63db\u5feb\u53d6\u6beb\u7121\u7bc0\u5236\u5806\u7a4d\u6642\uff0c\u6703\u62d6\u6162\u8de8\u6d32\u5b58\u53d6\u901f\u5ea6\u3001\u9020\u6210IO\u74f6\u9838\uff0c\u9084\u6703\u964d\u4f4e\u6838\u5fc3\u696d\u52d9\u61c9\u7528\u7684\u56de\u61c9\u6548\u7387\u3002\u672c\u6307\u5357\u6df1\u5165\u5256\u6790Linux\u81e8\u6642\u6578\u64da\u5132\u5b58\u6a5f\u5236\u7684\u6280\u8853\u539f\u7406\uff0c\u7d50\u5408<a href=\"https:\/\/www.varidata.com\/zh-tw\/server\/los-angeles\/\" target=\"_blank\">\u7f8e\u570b\u4f3a\u670d\u5668<\/a>\u7684\u7368\u7279\u5834\u666f\u9700\u6c42\uff08\u5982\u8de8\u6d0b\u6578\u64da\u50b3\u8f38\u30017\u00d724\u5c0f\u6642\u4e0d\u9593\u65b7\u904b\u884c\uff09\uff0c\u63d0\u4f9b\u7d93\u6975\u5ba2\u9a57\u8b49\u7684\u53ef\u843d\u5730\u65b9\u6cd5\uff0c\u5354\u52a9\u4f60\u5b89\u5168\u6e05\u7406\u591a\u9918\u7684\u8a18\u61b6\u9ad4\u5c64\uff0c\u540c\u6642\u6700\u4f73\u5316\u7cfb\u7d71\u9577\u671f\u904b\u884c\u6548\u7387\u3002<\/p>\n<h2><strong>\u4e00\u3001\u7f8e\u570b\u4f3a\u670d\u5668\u5834\u666f\u4e0bLinux\u81e8\u6642\u8cc7\u6599\u5c64\u7684\u5de5\u4f5c\u908f\u8f2f<\/strong><\/h2>\n<p>\u5728\u8457\u624b\u6e05\u7406\u64cd\u4f5c\u524d\uff0c\u9996\u5148\u8981\u7406\u89e3Linux\u7684\u81e8\u6642\u8cc7\u6599\u5132\u5b58\u6a5f\u5236\uff0c\u4ee5\u53ca\u70ba\u4f55\u7f8e\u570b\u4f3a\u670d\u5668\u74b0\u5883\u6703\u653e\u5927\u5176\u5f71\u97ff\uff1a<\/p>\n<ul>\n<li><strong>\u6838\u5fc3\u6a5f\u5236<\/strong>\uff1aLinux\u4e3b\u8981\u4f9d\u8cf4\u4e09\u5c64\u8a18\u61b6\u9ad4\u5132\u5b58\u7d50\u69cb\u2014\u2014\u9801\u5feb\u53d6\uff08\u7528\u65bc\u6a94\u6848\u7cfb\u7d71\u8cc7\u6599\uff09\u3001\u76ee\u9304\/\u7d22\u5f15\u7bc0\u9ede\u5feb\u53d6\uff08\u7528\u65bc\u76ee\u9304\u7d50\u69cb\/\u4e2d\u7e7c\u8cc7\u6599\uff09\u3001\u4ea4\u63db\u5feb\u53d6\u5340\uff08\u7528\u65bc\u9ad8\u983b\u5b58\u53d6\u7684\u4ea4\u63db\u5206\u5272\u5340\u8cc7\u6599\uff09\u2014\u2014\u4ee5\u6b64\u6e1b\u5c11\u78c1\u789fIO\u4e26\u52a0\u901f\u91cd\u8907\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u7f8e\u570b\u4f3a\u670d\u5668\u7279\u6027<\/strong>\uff1a\u8de8\u5927\u897f\u6d0b\/\u592a\u5e73\u6d0b\u7684\u8cc7\u6599\u50b3\u8f38\u672c\u8eab\u5b58\u5728\u56fa\u6709\u5ef6\u9072\uff0c\u800c\u4f4e\u6548\u7684\u81e8\u6642\u8cc7\u6599\u5132\u5b58\u6703\u8feb\u4f7f\u7cfb\u7d71\u5f9e\u78c1\u789f\u91cd\u65b0\u8b80\u53d6\u8cc7\u6599\uff0c\u800c\u975e\u5229\u7528\u9ad8\u901f\u8a18\u61b6\u9ad4\uff0c\u9032\u4e00\u6b65\u52a0\u5287\u5ef6\u9072\u3002\u5c0d\u65bc\u9ad8\u4f75\u767c\u5834\u666f\uff08\u5982\u5168\u7403API\u3001\u5167\u5bb9\u767c\u5e03\u7db2\u8def\uff09\uff0c\u9810\u8f09\u5165\u7684\u8cc7\u6599\u76f4\u63a5\u6c7a\u5b9a\u7d42\u7aef\u4f7f\u7528\u8005\u9ad4\u9a57\u3002<\/li>\n<li><strong>\u8a18\u61b6\u9ad4\u81a8\u8139\u7684\u5371\u5bb3<\/strong>\uff1a\u7576\u81e8\u6642\u8a18\u61b6\u9ad4\u5360\u7528\u8d85\u904e\u53ef\u7528\u8a18\u61b6\u9ad4\u768470%\u6642\uff0cLinux\u53ef\u80fd\u6703\u5c07\u61c9\u7528\u7a0b\u5f0f\u8cc7\u6599\u7f6e\u63db\u5230\u78c1\u789f\uff0c\u5c0e\u81f4\u7cfb\u7d71\u56de\u61c9\u8b8a\u6162\uff0c\u4e14\u9019\u7a2e\u5361\u9813\u5728\u6d77\u5916\u5b58\u53d6\u5834\u666f\u4e2d\u6703\u88ab\u9032\u4e00\u6b65\u653e\u5927\u3002\u4f46\u76f2\u76ee\u6e05\u7406\u9019\u4e9b\u5132\u5b58\u5c64\u6703\u55aa\u5931\u5176\u6548\u80fd\u512a\u52e2\u2014\u2014\u627e\u5230\u5e73\u8861\u624d\u662f\u95dc\u9375\u3002<\/li>\n<\/ul>\n<h2><strong>\u4e8c\u3001\u8a3a\u65b7\u8a18\u61b6\u9ad4\u81a8\u8139\uff1a\u6975\u5ba2\u7d1a\u76e3\u63a7\u5de5\u5177<\/strong><\/h2>\n<p>\u5728\u6e05\u7406\u591a\u9918\u7684\u8a18\u61b6\u9ad4\u5c64\u524d\uff0c\u9700\u900f\u904e\u4ee5\u4e0b\u6280\u8853\u76e3\u63a7\u5de5\u5177\u78ba\u8a8d\u5176\u70ba\u6548\u80fd\u74f6\u9838\u2014\u2014\u9019\u662f\u7f8e\u570b\u4f3a\u670d\u5668\u7ba1\u7406\u54e1\u5be6\u73fe\u7cbe\u6e96\u7dad\u904b\u7684\u6838\u5fc3\uff1a<\/p>\n<ol>\n<li><strong>\u8a18\u61b6\u9ad4\u8207\u5132\u5b58\u5feb\u901f\u5feb\u7167<\/strong>\uff1a\u4f7f\u7528<code>free -h<\/code>\u67e5\u770b\u7e3d\u8a18\u61b6\u9ad4\u3001\u5df2\u7528\u8a18\u61b6\u9ad4\u3001\u9592\u7f6e\u8a18\u61b6\u9ad4\u548c\u81e8\u6642\u5132\u5b58\u8a18\u61b6\u9ad4\u3002\u91cd\u9ede\u95dc\u6ce8\u300ccached\u300d\u6b04\u4f4d\uff08\u6574\u5408\u9801\u5feb\u53d6\u8207\u76ee\u9304\/\u7d22\u5f15\u7bc0\u9ede\u5feb\u53d6\uff09\u548c\u300cavailable\u300d\u6b04\u4f4d\uff08\u61c9\u7528\u7a0b\u5f0f\u53ef\u547c\u53eb\u7684\u8a18\u61b6\u9ad4\uff09\u3002<\/li>\n<li><strong>\u900f\u904e\/proc\/meminfo\u6df1\u5ea6\u5206\u6790<\/strong>\uff1a\u57f7\u884c<code>cat \/proc\/meminfo<\/code>\u53d6\u5f97\u7cbe\u7d30\u5316\u8cc7\u6599\uff1a\n<ul>\n<li><code>Cached<\/code>\uff1a\u9801\u5feb\u53d6\u5927\u5c0f\uff08\u6a94\u6848\u7cfb\u7d71\u8cc7\u6599\uff09<\/li>\n<li><code>Buffers<\/code>\uff1a\u78c1\u789f\u5beb\u5165\u64cd\u4f5c\u7684\u81e8\u6642\u5132\u5b58\u5340<\/li>\n<li><code>SReclaimable<\/code>\uff1aSlab\u914d\u7f6e\u5668\u9810\u7559\u7a7a\u9593\uff08\u53ef\u56de\u6536\u7684\u76ee\u9304\/\u7d22\u5f15\u7bc0\u9ede\u8cc7\u6599\uff09<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u7a0b\u5e8f\u7d1a\u8a18\u61b6\u9ad4\u5206\u6790<\/strong>\uff1a\u7d50\u5408<code>top<\/code>\u6216<code>htop<\/code>\u8207<code>smem -t -k<\/code>\uff0c\u5b9a\u4f4d\u5360\u7528\u5927\u91cf\u81e8\u6642\u8cc7\u6599\u7684\u7a0b\u5e8f\uff08\u91cd\u9ede\u95dc\u6ce8\u8207\u6a94\u6848\u5bc6\u96c6\u578b\u5de5\u4f5c\u8ca0\u8f09\u76f8\u95dc\u7684\u9ad8\u300cRSS\u300d\u6216\u300cPSS\u300d\u503c\uff09\u3002<\/li>\n<li><strong>\u7f8e\u570b\u4f3a\u670d\u5668\u5ef6\u9072\u95dc\u806f\u5206\u6790<\/strong>\uff1a\u5c07\u8a18\u61b6\u9ad4\u76e3\u63a7\u8207<code>mtr<\/code>\uff08My Traceroute\uff09\u7d50\u5408\uff0c\u78ba\u8a8d\u81e8\u6642\u5132\u5b58\u5360\u7528\u904e\u9ad8\u662f\u5426\u8207\u6d77\u5916ping\u503c\u4e0a\u5347\u540c\u6b65\u2014\u2014\u9019\u662f\u5224\u65b7\u8a18\u61b6\u9ad4\u81a8\u8139\u5f71\u97ff\u4f7f\u7528\u8005\u9ad4\u9a57\u7684\u95dc\u9375\u4f9d\u64da\u3002<\/li>\n<\/ol>\n<h2><strong>\u4e09\u3001\u4fdd\u969c\u7f8e\u570b\u4f3a\u670d\u5668\u7a69\u5b9a\u6027\u7684\u5b89\u5168\u6e05\u7406\u65b9\u6cd5<\/strong><\/h2>\n<p>Linux\u6838\u5fc3\u8a2d\u8a08\u652f\u63f4\u9078\u64c7\u6027\u6e05\u7406\u81e8\u6642\u8a18\u61b6\u9ad4\u5c64\uff0c\u53ef\u6839\u64da\u7f8e\u570b\u4f3a\u670d\u5668\u7684\u5de5\u4f5c\u8ca0\u8f09\uff08\u4f3a\u670d\u5668\u79df\u7528\u3001\u4f3a\u670d\u5668\u6258\u7ba1\u3001\u96f2\u7aef\u57f7\u884c\u500b\u9ad4\uff09\u548c\u904b\u884c\u6642\u9577\u9700\u6c42\u9078\u64c7\u5c0d\u61c9\u65b9\u5f0f\uff1a<\/p>\n<h3>3.1 \u81e8\u6642\u6e05\u7406\uff08\u7121\u9700\u91cd\u65b0\u555f\u52d5\uff09<\/h3>\n<p>\u4f7f\u7528\u4ee5\u4e0bsysctl\u6307\u4ee4\u6e05\u7406\u591a\u9918\u5c64\uff0c\u4e14\u7121\u9700\u91cd\u65b0\u555f\u52d5\u670d\u52d9\u2014\u2014\u9069\u5408\u4f4e\u6d41\u91cf\u6642\u6bb5\u64cd\u4f5c\uff08\u5982\u7f8e\u570b\u4f3a\u670d\u5668\u7684UTC\u6642\u95930-4\u9ede\uff09\uff1a<\/p>\n<ul>\n<li><strong>\u50c5\u6e05\u7406\u9801\u5feb\u53d6<\/strong>\uff1a<code>sync; echo 1 &gt; \/proc\/sys\/vm\/drop_caches<\/code>\n<p>\u70ba\u4f55\u8981\u57f7\u884c<code>sync<\/code>\uff1f\u8a72\u6307\u4ee4\u6703\u5237\u65b0\u5f85\u5beb\u5165\u78c1\u789f\u7684\u8cc7\u6599\uff0c\u907f\u514d\u8cc7\u6599\u907a\u5931\u2014\u2014\u9019\u662f\u7f8e\u570b\u751f\u7522\u74b0\u5883\u4f3a\u670d\u5668\u7684\u5fc5\u64cd\u4f5c\u3002<\/p>\n<\/li>\n<li><strong>\u6e05\u7406\u76ee\u9304\/\u7d22\u5f15\u7bc0\u9ede\u5feb\u53d6<\/strong>\uff1a<code>sync; echo 2 &gt; \/proc\/sys\/vm\/drop_caches<\/code>\n<p>\u9069\u7528\u65bc\u6a94\u6848\u7cfb\u7d71\u64cd\u4f5c\u983b\u7e41\u7684\u5834\u666f\uff08\u5982\u5305\u542b\u5927\u91cf\u4f7f\u7528\u8005\u76ee\u9304\u7684\u4f3a\u670d\u5668\u79df\u7528\u5e73\u53f0\uff09\u3002<\/p>\n<\/li>\n<li><strong>\u6e05\u7406\u6240\u6709\u8a18\u61b6\u9ad4\u5c64<\/strong>\uff1a<code>sync; echo 3 &gt; \/proc\/sys\/vm\/drop_caches<\/code>\n<p>\u50c5\u5728\u8a18\u61b6\u9ad4\u56b4\u91cd\u81a8\u8139\u6642\u4f7f\u7528\u2014\u2014\u907f\u514d\u5728\u7f8e\u570b\u4f3a\u670d\u5668\u9ad8\u5cf0\u6d41\u91cf\u671f\uff08\u5982\u5317\u7f8e\u5de5\u4f5c\u6642\u6bb5\uff09\u57f7\u884c\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>3.2 \u85c9\u7531Cron\u5be6\u73fe\u81ea\u52d5\u5316\u6e05\u7406\uff08\u6975\u5ba2\u7684\u300c\u61f6\u4eba\u65b9\u6848\u300d\uff09<\/h3>\n<p>\u5c0d\u65bc7\u00d724\u5c0f\u6642\u904b\u884c\u7684\u7f8e\u570b\u4f3a\u670d\u5668\uff0c\u53ef\u900f\u904e\u81e8\u754c\u503c\u89f8\u767c\u6307\u4ee4\u78bc\u5be6\u73fe\u81ea\u52d5\u5316\u6e05\u7406\u2014\u2014\u7121\u9700\u4eba\u5de5\u4ecb\u5165\uff1a<\/p>\n<ol>\n<li>\u5efa\u7acb\u6307\u4ee4\u78bc\uff08\u7bc4\u4f8b\uff1a<code>\/usr\/local\/bin\/purge_temp_memory.sh<\/code>\uff09\uff0c\u5167\u5bb9\u5982\u4e0b\uff1a\n<pre><code>#!\/bin\/bash\r\nSTORAGE_THRESHOLD=70  # \u81e8\u6642\u5c64\u5360\u7528\u8a18\u61b6\u9ad4\u7684\u81e8\u754c\u503c\u767e\u5206\u6bd4\r\nCURRENT_STORAGE=$(free | awk '\/Mem:\/ {print $6\/$2*100}' | cut -d. -f1)\r\n\r\nif [ \"$CURRENT_STORAGE\" -ge \"$STORAGE_THRESHOLD\" ]; then\r\n    sync\r\n    echo 3 &gt; \/proc\/sys\/vm\/drop_caches\r\n    logger \"Linux\u81e8\u6642\u8a18\u61b6\u9ad4\u5df2\u6e05\u7406 - \u81e8\u754c\u503c$STORAGE_THRESHOLD%\u5df2\u8d85\u51fa\uff08\u76ee\u524d\uff1a$CURRENT_STORAGE%\uff09\"\r\nfi<\/code><\/pre>\n<\/li>\n<li>\u8ce6\u4e88\u57f7\u884c\u6b0a\u9650\uff1a<code>chmod +x \/usr\/local\/bin\/purge_temp_memory.sh<\/code><\/li>\n<li>\u65b0\u589e\u81f3\u6392\u7a0b\u5de5\u4f5c\uff08UTC\u6642\u9593\u6bcf\u65e5\u51cc\u66682\u9ede\u57f7\u884c\uff09\uff1a<code>0 2 * * * \/usr\/local\/bin\/purge_temp_memory.sh<\/code><\/li>\n<\/ol>\n<p>\u5be6\u7528\u6280\u5de7\uff1a\u5c0d\u65bc\u5132\u5b58\u5927\u91cf\u8cc7\u6599\u96c6\u7684\u4f3a\u670d\u5668\u6258\u7ba1\u7cfb\u7d71\uff0c\u53ef\u5c07\u81e8\u754c\u503c\u8abf\u6574\u81f380%\u2014\u2014\u4fdd\u7559\u66f4\u591a\u9810\u8f09\u5165\u8cc7\u6599\u80fd\u6e1b\u5c11\u91cd\u8907\u5b58\u53d6\u6642\u7684\u78c1\u789fIO\u3002<\/p>\n<h3>3.3 \u6838\u5fc3\u8abf\u6821\uff1a\u5f9e\u6839\u6e90\u907f\u514d\u8a18\u61b6\u9ad4\u81a8\u8139<\/h3>\n<p>\u9577\u671f\u6700\u4f73\u5316\u9060\u6bd4\u624b\u52d5\u6e05\u7406\u66f4\u6709\u6548\u2014\u2014\u91dd\u5c0d\u7f8e\u570b\u4f3a\u670d\u5668\u5de5\u4f5c\u8ca0\u8f09\u8abf\u6574\u4ee5\u4e0b\u6838\u5fc3\u53c3\u6578\uff1a<\/p>\n<ul>\n<li><strong>vfs_cache_pressure<\/strong>\uff1a\u63a7\u5236\u7d22\u5f15\u7bc0\u9ede\/\u76ee\u9304\u5feb\u53d6\u7684\u56de\u6536\u512a\u5148\u7d1a\uff08\u9810\u8a2d\u503c\uff1a100\uff09\u3002\u5c0d\u65bc\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u5834\u666f\uff1a<br \/>\n            <code>sysctl -w vm.vfs_cache_pressure=120<\/code>\uff08\u52a0\u5feb\u81e8\u6642\u5c64\u56de\u6536\u901f\u5ea6\uff09<\/p>\n<p>\u5c0d\u65bc\u5132\u5b58\u975c\u614b\u8cc7\u6599\u7684\u4f3a\u670d\u5668\u6258\u7ba1\u5834\u666f\uff1a<code>sysctl -w vm.vfs_cache_pressure=80<\/code>\uff08\u4fdd\u7559\u66f4\u591a\u9810\u8f09\u5165\u8cc7\u6599\uff09<\/p>\n<\/li>\n<li><strong>swappiness<\/strong>\uff1a\u964d\u4f4e\u4ea4\u63db\u5206\u5272\u5340\u4f7f\u7528\u7387\uff08\u9810\u8a2d\u503c\uff1a60\uff09\u3002\u5c0d\u65bc\u8a18\u61b6\u9ad4\u226516GB\u7684\u7f8e\u570b\u4f3a\u670d\u5668\uff1a<br \/>\n            <code>sysctl -w vm.swappiness=10<\/code>\uff08\u512a\u5148\u4f7f\u7528\u5be6\u9ad4\u8a18\u61b6\u9ad4\u800c\u975e\u4ea4\u63db\u5206\u5272\u5340\uff09\n        <\/li>\n<li>\u4f7f\u4fee\u6539\u6c38\u4e45\u751f\u6548\uff1a\u5c07\u53c3\u6578\u65b0\u589e\u81f3<code>\/etc\/sysctl.conf<\/code>\uff0c\u4e26\u57f7\u884c<code>sysctl -p<\/code>\u8f09\u5165\u8a2d\u5b9a\u3002<\/li>\n<\/ul>\n<h2><strong>\u56db\u3001\u7f8e\u570b\u4f3a\u670d\u5668\u8a18\u61b6\u9ad4\u6700\u4f73\u5316\uff1a\u5fc5\u9808\u898f\u907f\u7684\u95dc\u9375\u8aa4\u5340<\/strong><\/h2>\n<p>\u8cc7\u6df1\u6975\u5ba2\u7ba1\u7406\u54e1\u90fd\u6e05\u695a\uff0c\u8a18\u61b6\u9ad4\u7ba1\u7406\u7684\u6838\u5fc3\u4e0d\u50c5\u662f\u57f7\u884c\u6307\u4ee4\uff0c\u66f4\u8981\u898f\u907f\u932f\u8aa4\u64cd\u4f5c\u2014\u2014\u4ee5\u4e0b\u884c\u70ba\u6703\u5371\u53ca\u7f8e\u570b\u4f3a\u670d\u5668\u7a69\u5b9a\u6027\uff1a<\/p>\n<ul>\n<li><strong>\u7981\u6b62\u9ad8\u983b\u7387\u6e05\u7406<\/strong>\uff1a\u6bcf\u5c0f\u6642\u57f7\u884c<code>drop_caches<\/code>\u6703\u8feb\u4f7fLinux\u91cd\u65b0\u5efa\u69cb\u81e8\u6642\u5132\u5b58\u5c64\uff0c\u5c0e\u81f4\u78c1\u789fIO\u66b4\u589e\uff0c\u52a0\u5287\u6d77\u5916\u5b58\u53d6\u5ef6\u9072\u3002<\/li>\n<li><strong>\u5207\u52ff\u5b8c\u5168\u505c\u7528\u5132\u5b58\u6a5f\u5236<\/strong>\uff1a\u5c07<code>vm.drop_caches<\/code>\u4fee\u6539\u70ba0\u6703\u6c38\u4e45\u95dc\u9589\u81e8\u6642\u8cc7\u6599\u7cfb\u7d71\u2014\u2014\u9019\u7a2e\u65b0\u624b\u932f\u8aa4\u6703\u56b4\u91cd\u640d\u5bb3\u6a94\u6848\u5bc6\u96c6\u578b\u5de5\u4f5c\u8ca0\u8f09\uff08\u5982\u4f3a\u670d\u5668\u79df\u7528\uff09\u7684\u6548\u80fd\u3002<\/li>\n<li><strong>\u4e0d\u53ef\u5ffd\u8996\u4ea4\u63db\u5206\u5272\u5340\u4f7f\u7528\u7387<\/strong>\uff1a\u82e5\u6e05\u7406\u64cd\u4f5c\u7121\u6cd5\u964d\u4f4e\u4ea4\u63db\u5206\u5272\u5340\u6d3b\u52d5\uff0c\u4ee3\u8868\u7f8e\u570b\u4f3a\u670d\u5668\u914d\u7f6e\u4e0d\u8db3\u2014\u2014\u61c9\u5347\u7d1a\u8a18\u61b6\u9ad4\uff0c\u800c\u975e\u4f9d\u8cf4\u81e8\u6642\u4fee\u5fa9\u65b9\u6848\u3002<\/li>\n<li><strong>\u907f\u958b\u9ad8\u5cf0\u6d41\u91cf\u671f\u6e05\u7406<\/strong>\uff1a\u5c0d\u65bc\u670d\u52d9\u5317\u7f8e\u4f7f\u7528\u8005\u7684\u7f8e\u570b\u4f3a\u670d\u5668\uff0c\u907f\u514d\u5728\u7f8e\u6771\u6642\u9593\u65e99\u9ede\u81f3\u665a5\u9ede\u57f7\u884c\u8a18\u61b6\u9ad4\u64cd\u4f5c\u2014\u2014\u8a72\u6642\u6bb5\u6070\u9022\u6b50\u6d32\u3001\u4e9e\u6d32\u7684\u6d77\u5916\u5b58\u53d6\u9ad8\u5cf0\u3002<\/li>\n<\/ul>\n<h2><strong>\u4e94\u3001\u9032\u968e\u6280\u5de7\uff1a\u7f8e\u570b\u4f3a\u670d\u5668\u8a18\u61b6\u9ad4\u8207\u6548\u80fd\u5354\u540c\u6700\u4f73\u5316<\/strong><\/h2>\n<p>\u7d50\u5408\u4ee5\u4e0b\u6975\u5ba2\u7d1a\u7b56\u7565\uff0c\u5c07\u7f8e\u570b\u4f3a\u670d\u5668\u7684\u6700\u4f73\u5316\u6548\u679c\u6700\u5927\u5316\uff1a<\/p>\n<ul>\n<li><strong>\u8a18\u61b6\u9ad4+CDN\u806f\u52d5<\/strong>\uff1a\u5c07Linux\u8abf\u6821\u8207\u5168\u7403CDN\u7d50\u5408\u2014\u2014\u628a\u975c\u614b\u5167\u5bb9\u5378\u8f09\u81f3\u908a\u7de3\u7bc0\u9ede\uff0c\u964d\u4f4e\u7f8e\u570b\u4f86\u6e90\u7ad9\u7684\u81e8\u6642\u5132\u5b58\u58d3\u529b\u3002<\/li>\n<li><strong>\u76e3\u63a7\u544a\u8b66\u8a2d\u5b9a<\/strong>\uff1a\u5efa\u7f6ePrometheus + Grafana\u5100\u8868\u677f\uff0c\u76e3\u63a7<code>Cached<\/code>\u6578\u503c\u4e26\u8a2d\u5b9a\u81e8\u754c\u503c\u544a\u8b66\u2014\u2014\u9019\u5c0d\u7121\u6258\u7ba1\u652f\u63f4\u7684\u4f3a\u670d\u5668\u6258\u7ba1\u5834\u666f\u81f3\u95dc\u91cd\u8981\u3002<\/li>\n<li><strong>\u8a18\u61b6\u9ad4\u8207\u5132\u5b58\u6b0a\u8861<\/strong>\uff1a\u5c0d\u65bc\u8a18\u61b6\u9ad4&lt;8GB\u7684\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u5834\u666f\uff0c\u53ef\u5c07<code>vfs_cache_pressure<\/code>\u8abf\u4f4e\u81f3150\uff0c\u512a\u5148\u4fdd\u969c\u8cc7\u6599\u5eab\/API\u7684\u8a18\u61b6\u9ad4\u5360\u7528\uff0c\u540c\u6642\u4ecd\u5229\u7528\u9810\u8f09\u5165\u8cc7\u6599\u63d0\u5347\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2><strong>\u516d\u3001\u7e3d\u7d50\uff1a\u6975\u5ba2\u7684\u8a18\u61b6\u9ad4\u7ba1\u7406\u6e96\u5247<\/strong><\/h2>\n<p>\u7f8e\u570b\u4f3a\u670d\u5668\u7684Linux\u5feb\u53d6\u6e05\u7406\u6838\u5fc3\u4e26\u975e\u300c\u91cb\u653e\u8a18\u61b6\u9ad4\u300d\uff0c\u800c\u662f\u5e73\u8861\u6548\u80fd\u3001\u7a69\u5b9a\u6027\u8207\u6d77\u5916\u4f7f\u7528\u8005\u9ad4\u9a57\u3002\u900f\u904e\u6280\u8853\u5de5\u5177\u8a3a\u65b7\u8a18\u61b6\u9ad4\u81a8\u8139\u3001\u63a1\u7528\u91dd\u5c0d\u6027\u6e05\u7406\u65b9\u6cd5\u3001\u7d50\u5408\u5de5\u4f5c\u8ca0\u8f09\uff08\u4f3a\u670d\u5668\u79df\u7528\/\u6258\u7ba1\/\u96f2\u7aef\uff09\u8abf\u6821\u6838\u5fc3\uff0c\u53ef\u964d\u4f4e20%-30%\u7684\u5b58\u53d6\u5ef6\u9072\uff0c\u4fdd\u969c\u6838\u5fc3\u61c9\u7528\u7a69\u5b9a\u904b\u884c\u3002\u8a18\u4f4f\uff1a\u81e8\u6642\u8cc7\u6599\u7cfb\u7d71\u662fLinux\u7684\u512a\u52e2\u7279\u6027\uff0c\u800c\u975e\u7f3a\u9677\u2014\u2014\u8981\u6700\u4f73\u5316\u800c\u975e\u5ee2\u9664\u3002\u638c\u63e1\u9019\u4e9b\u6280\u5de7\uff0c\u80fd\u8b93\u7f8e\u570b\u4f3a\u670d\u5668\u7ba1\u7406\u54e1\u5c07\u8a18\u61b6\u9ad4\u5f9e\u96b1\u85cf\u74f6\u9838\u8f49\u5316\u70ba\u670d\u52d9\u5168\u7403\u4f7f\u7528\u8005\u7684\u7af6\u722d\u512a\u52e2\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5c0d\u65bc\u7dad\u904b\u7f8e\u570bLinux\u4f3a\u670d\u5668\u7684\u7ba1\u7406\u54e1\u800c\u8a00\u2014\u2014\u7121\u8ad6\u662f\u7ba1\u7406\u4f3a\u670d\u5668\u79df\u7528\u5e73\u53f0\u3001\u4f3a\u670d\u5668\u6258\u7ba1\u90e8\u7f72\u67b6\u69cb\uff0c\u9084\u662f\u96f2\u7aef\u57f7\u884c\u500b\u9ad4\u2014\u2014 [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/how-to-clear-linux-cache-on-us-servers\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":12,"featured_media":28400,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[267],"tags":[],"class_list":["post-28403","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-tc"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5982\u4f55\u5728Linux\u7cfb\u7d71\u4e0a\u6e05\u7406\u7f8e\u570b\u4f3a\u670d\u5668\u5feb\u53d6?<\/title>\n<meta name=\"description\" content=\"\u638c\u63e1\u7f8e\u570b\u4f3a\u670d\u5668Linux\u5feb\u53d6\u6e05\u7406\u6280\u5de7\uff0c\u5305\u542b\u6280\u8853\u89e3\u6790\u3001\u5b89\u5168\u6307\u4ee4\u8207\u6838\u5fc3\u8abf\u6821\uff0c\u63d0\u5347\u6548\u80fd\u4e26\u964d\u4f4e\u6d77\u5916\u5b58\u53d6\u5ef6\u9072\u3002\" \/>\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.varidata.com\/zh-tw\/blog-tc\/how-to-clear-linux-cache-on-us-servers\/\" \/>\n<meta property=\"og:locale\" content=\"zh_TW\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5982\u4f55\u5728Linux\u7cfb\u7d71\u4e0a\u6e05\u7406\u7f8e\u570b\u4f3a\u670d\u5668\u5feb\u53d6?\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/how-to-clear-linux-cache-on-us-servers\/\" \/>\n<meta property=\"og:site_name\" content=\"Varidata Limited\" \/>\n<meta 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