{"id":209074,"date":"2025-09-30T04:10:50","date_gmt":"2025-09-29T20:10:50","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209074\/"},"modified":"2025-09-30T04:10:51","modified_gmt":"2025-09-29T20:10:51","slug":"vps-177","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209074\/","title":{"rendered":"\u9999\u6e2fVPS\u5185\u5b58\u6269\u5c55\u5b9e\u6218\uff1a\u8f7b\u677e\u6ee1\u8db3\u5927\u6570\u636e\u6027\u80fd\u9700\u6c42"},"content":{"rendered":"<p>\u968f\u7740\u5927\u6570\u636e\u3001\u5b9e\u65f6\u5206\u6790\u548c\u5185\u5b58\u6570\u636e\u5e93\u7b49\u5e94\u7528\u5728\u7f51\u7ad9\u548c\u4f01\u4e1a\u7cfb\u7edf\u4e2d\u7684\u666e\u53ca\uff0c\u5355\u53f0\u9999\u6e2fVPS\u7684\u5185\u5b58\u80fd\u529b\u5e38\u5e38\u6210\u4e3a\u6027\u80fd\u74f6\u9888\u3002\u672c\u6587\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\uff0c\u4ecb\u7ecd\u5173\u4e8e\u9999\u6e2fVPS\u5185\u5b58\u6269\u5c55\u7684\u5b9e\u6218\u6280\u672f\u7ec6\u8282\u4e0e\u9009\u578b\u5efa\u8bae\uff0c\u6db5\u76d6\u5e95\u5c42\u539f\u7406\u3001\u5e38\u89c1\u5e94\u7528\u573a\u666f\u3001\u5404\u7c7b\u6269\u5c55\u7b56\u7565\u7684\u4f18\u52a3\u6bd4\u8f83\u4ee5\u53ca\u5728\u9009\u8d2d\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fdVPS\u65f6\u7684\u6ce8\u610f\u70b9\uff0c\u5e2e\u52a9\u60a8\u5728\u5b9e\u9645\u8fd0\u7ef4\u4e2d\u505a\u51fa\u6700\u4f73\u51b3\u7b56\u3002<\/p>\n<h2>\u5185\u5b58\u6269\u5c55\u7684\u57fa\u672c\u539f\u7406\u4e0e\u865a\u62df\u5316\u76f8\u5173\u6982\u5ff5<\/h2>\n<p>\u5728\u4e91\u73af\u5883\u4e2d\uff0c\u5185\u5b58\u5e76\u975e\u50cf\u7269\u7406\u673a\u90a3\u6837\u56fa\u5b9a\u3002\u5e38\u89c1\u865a\u62df\u5316\u6280\u672f\uff08KVM\/QEMU\u3001Xen\u3001VMware\uff09\u901a\u8fc7\u865a\u62df\u5185\u5b58\u7ba1\u7406\u5c06\u7269\u7406\u5185\u5b58\u5206\u914d\u7ed9\u591a\u4e2a\u865a\u62df\u673a\u3002\u7406\u89e3\u4ee5\u4e0b\u6982\u5ff5\u6709\u52a9\u4e8e\u5408\u7406\u6269\u5c55\u5185\u5b58\uff1a<\/p>\n<ul>\n<li><strong>\u5185\u5b58\u6c14\u7403\uff08virtio-balloon\uff09\uff1a<\/strong>\u4e00\u79cd\u5141\u8bb8\u5bbf\u4e3b\u673a\u52a8\u6001\u56de\u6536\u6216\u5206\u914d\u7ed9\u865a\u62df\u673a\u5185\u5b58\u7684\u673a\u5236\uff0c\u5b9e\u73b0VMLive\u6269\u5bb9\u6216\u7f29\u51cf\u3002<\/li>\n<li><strong>\u5185\u5b58\u8fc7\u8ba2\u9605\uff08Overcommit\uff09\uff1a<\/strong>\u5bbf\u4e3b\u673a\u5141\u8bb8\u5206\u914d\u7684\u865a\u62df\u5185\u5b58\u603b\u91cf\u8d85\u8fc7\u7269\u7406\u5185\u5b58\u3002\u8fd9\u80fd\u63d0\u9ad8\u8d44\u6e90\u5229\u7528\u7387\u4f46\u5b58\u5728OOM\u98ce\u9669\u3002<\/li>\n<li><strong>\u5927\u9875\uff08HugePages\uff09\u4e0e\u900f\u660e\u5927\u9875\uff08THP\uff09\uff1a<\/strong>\u51cf\u5c11TLB Miss\uff0c\u63d0\u9ad8\u5185\u5b58\u5bc6\u96c6\u578b\u5e94\u7528\u5982\u6570\u636e\u5e93\u548c\u7f13\u5b58\u7684\u6027\u80fd\u3002<\/li>\n<li><strong>NUMA\u62d3\u6251\uff1a<\/strong>\u591aCPU\u670d\u52a1\u5668\u4e0a\uff0c\u8bb0\u5fc6\u8bbf\u95ee\u5ef6\u8fdf\u4f9d\u8d56\u4e8e\u5185\u5b58\u4e0eCPU\u7684\u4eb2\u548c\u5173\u7cfb\uff0c\u5f71\u54cd\u5927\u5185\u5b58\u5e94\u7528\u7684\u541e\u5410\u4e0e\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<h3>\u5185\u6838\u4e0e\u7528\u6237\u6001\u7684\u8c03\u4f18\u8981\u70b9<\/h3>\n<ul>\n<li>\u8c03\u6574 vm.swappiness \u4e0e swapiness \u7684\u7b56\u7565\uff1a\u5bf9\u4e8e\u5185\u5b58\u654f\u611f\u578b\u5e94\u7528\uff0c\u5efa\u8bae\u5c06 <code>vm.swappiness<\/code> \u8bbe\u4f4e\uff08\u5982 10 \u6216\u66f4\u4f4e\uff09\uff0c\u964d\u4f4e\u88ab\u6362\u51fa\u7684\u6982\u7387\u3002<\/li>\n<li>\u542f\u7528 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VMs\u3002<\/li>\n<\/ul>\n<h2>\u53ef\u5b9e\u65bd\u7684\u5185\u5b58\u6269\u5c55\u7b56\u7565<\/h2>\n<p>\u5728\u9999\u6e2fVPS\u73af\u5883\u4e2d\uff0c\u5e38\u89c1\u7684\u5185\u5b58\u6269\u5c55\u65b9\u6cd5\u53ef\u4ee5\u5206\u4e3a\u201c\u865a\u62df\u5c42\u9762\u201d\u7684\u5373\u65f6\u624b\u6bb5\u4e0e\u201c\u5e94\u7528\u5c42\u9762\u201d\u7684\u4f18\u5316\u624b\u6bb5\u3002<\/p>\n<h3>\u865a\u62df\u5c42\u9762\uff1a\u52a8\u6001\u6269\u5c55\u4e0e\u6c34\u5e73\u6269\u5bb9<\/h3>\n<ul>\n<li><strong>\u52a8\u6001\u5185\u5b58\u5206\u914d\uff08\u70ed\u6269\u5bb9\uff09<\/strong>\uff1a\u5982\u679c\u670d\u52a1\u63d0\u4f9b\u5546\u652f\u6301 virtio-balloon \u6216\u7c7b\u4f3c API\uff0c\u53ef\u5728\u4e0d\u4e2d\u65ad\u4e1a\u52a1\u7684\u60c5\u51b5\u4e0b\u589e\u52a0\u865a\u62df\u5185\u5b58\u3002\u9002\u7528\u4e8e\u7a81\u53d1\u6d41\u91cf\u4e0e\u4e34\u65f6\u6269\u5145\u3002<\/li>\n<li><strong>\u8d2d\u4e70\u66f4\u5927\u89c4\u683c\u6216\u5185\u5b58\u5305<\/strong>\uff1a\u76f4\u63a5\u5728\u63a7\u5236\u9762\u677f\u8c03\u6574 VPS \u914d\u7f6e\uff0c\u6700\u7a33\u59a5\u4f46\u9700\u91cd\u542f\u6216\u505c\u673a\u77ed\u65f6\u95f4\u5185\u8fc1\u79fb\u3002<\/li>\n<li><strong>\u6c34\u5e73\u6269\u5bb9\uff08\u96c6\u7fa4\u5316\uff09<\/strong>\uff1a\u5bf9\u53ef\u6c34\u5e73\u62c6\u5206\u7684\u7cfb\u7edf\uff08\u5982 Elasticsearch\u3001Spark\u3001Redis Cluster\uff09\u4f18\u5148\u8003\u8651\u589e\u52a0\u8282\u70b9\u4ee5\u5206\u62c5\u5185\u5b58\u538b\u529b\uff0c\u964d\u4f4e\u5355\u70b9\u98ce\u9669\u3002<\/li>\n<li><strong>\u5229\u7528 swap \u6587\u4ef6\/\u5206\u533a\u4f5c\u4e3a\u7f13\u51b2<\/strong>\uff1a\u4e34\u65f6\u7f13\u89e3\u5185\u5b58\u538b\u529b\uff0c\u4f46\u4f1a\u5e26\u6765\u78c1\u76d8I\/O\u5ef6\u8fdf\uff0c\u9700\u914d\u5408 NVMe\/SSD \u4f18\u5316\u3002<\/li>\n<\/ul>\n<h3>\u5e94\u7528\u5c42\u9762\uff1a\u51cf\u5c11\u5185\u5b58\u5360\u7528\u4e0e\u63d0\u5347\u5229\u7528\u7387<\/h3>\n<ul>\n<li><strong>\u4f18\u5316\u5185\u5b58\u4f7f\u7528\u7684\u5e94\u7528\u914d\u7f6e<\/strong>\uff1a\u4f8b\u5982\u4e3a Redis \u8bbe\u7f6e maxmemory-policy\u3001\u4e3a Elasticsearch \u8c03\u6574 JVM \u5806\u5185\u5b58\uff08\u4e00\u822c\u4e0d\u8d85\u8fc7\u7269\u7406\u5185\u5b58\u768450%\uff09\uff0c\u4e3a MySQL \u4f18\u5316\u7f13\u5b58\u8bbe\u7f6e\u3002<\/li>\n<li><strong>\u5185\u5b58\u538b\u7f29\u4e0e\u7f13\u5b58\u5206\u7ea7<\/strong>\uff1a\u5728 Linux \u4e0a\u542f\u7528 Page Cache \u7b56\u7565\u3001\u4f7f\u7528\u7f13\u5b58\u5c42\uff08\u5982 Varnish\u3001Redis\uff09\u51cf\u5c11\u540e\u7aef\u5185\u5b58\u538b\u529b\u3002<\/li>\n<li><strong>\u4f7f\u7528\u5185\u5b58\u6620\u5c04\u6587\u4ef6\uff08mmap\uff09<\/strong>\uff1a\u5bf9\u4e8e\u5927\u6570\u636e\u8bfb\u53d6\u573a\u666f\uff0cmmap \u53ef\u907f\u514d\u590d\u5236\uff0c\u51cf\u5c11\u865a\u62df\u5185\u5b58\u5360\u7528\u3002<\/li>\n<li><strong>\u5206\u914d\u6c60\u4e0e\u5bf9\u8c61\u590d\u7528<\/strong>\uff1a\u5728\u9ad8\u5e76\u53d1\u5e94\u7528\uff08\u5c24\u5176\u662f Java\u3001Go\uff09\u4e2d\uff0c\u901a\u8fc7\u8fde\u63a5\u6c60\u3001\u5bf9\u8c61\u6c60\u964d\u4f4e\u5783\u573e\u56de\u6536\u548c\u9891\u7e41\u5206\u914d\u9020\u6210\u7684\u5185\u5b58\u6ce2\u52a8\u3002<\/li>\n<\/ul>\n<h2>\u5178\u578b\u5e94\u7528\u573a\u666f\u4e0e\u6280\u672f\u5efa\u8bae<\/h2>\n<p>\u4e0d\u540c\u573a\u666f\u5bf9\u5185\u5b58\u6269\u5c55\u7b56\u7565\u7684\u8981\u6c42\u4e0d\u540c\uff0c\u4e0b\u9762\u5217\u4e3e\u51e0\u79cd\u5e38\u89c1\u573a\u666f\u5e76\u7ed9\u51fa\u5177\u4f53\u5efa\u8bae\uff1a<\/p>\n<h3>\u5b9e\u65f6\u5927\u6570\u636e\u5904\u7406\uff08Spark\u3001Flink\uff09<\/h3>\n<ul>\n<li>\u4f18\u5148\u91c7\u7528\u6c34\u5e73\u6269\u5c55\uff0c\u4fdd\u8bc1\u6bcf\u4e2a\u8282\u70b9\u6709\u8db3\u591f\u5185\u5b58\u4e0eCPU\u3002<\/li>\n<li>\u5728\u9999\u6e2fVPS\u4e0a\u90e8\u7f72\u9700\u6ce8\u610f\u7f51\u7edc\u5ef6\u8fdf\uff0c\u82e5\u4e0e\u7f8e\u56fdVPS\u6216\u7f8e\u56fd\u670d\u52a1\u5668\u4e92\u8054\uff0c\u9700\u8bc4\u4f30\u8de8\u533a\u7f51\u7edc\u6296\u52a8\u5bf9Shuffle\u6027\u80fd\u7684\u5f71\u54cd\u3002<\/li>\n<li>\u914d\u7f6e\u5185\u5b58\u7ba1\u7406\u53c2\u6570\uff08executor memory\u3001off-heap\uff09\u5e76\u7ed3\u5408 Spark \u7684\u5783\u573e\u56de\u6536\u8c03\u4f18\u3002<\/li>\n<\/ul>\n<h3>\u641c\u7d22\u4e0e\u5206\u6790\uff08Elasticsearch\uff09<\/h3>\n<ul>\n<li>JVM \u5806\u5185\u5b58\u4e0d\u5b9c\u5360\u636e\u5168\u90e8\u7269\u7406\u5185\u5b58\uff0c\u4fdd\u7559 OS page cache \u63d0\u5347 IO \u6027\u80fd\u3002<\/li>\n<li>\u5728\u5355\u8282\u70b9\u5185\u5b58\u4e0d\u8db3\u65f6\u4f18\u5148\u589e\u52a0\u8282\u70b9\u6570\u800c\u975e\u65e0\u9650\u589e\u5927\u5806\u3002<\/li>\n<\/ul>\n<h3>\u5185\u5b58\u7f13\u5b58\u4e0e\u6570\u636e\u5e93\uff08Redis\u3001Memcached\u3001In-Memory DB\uff09<\/h3>\n<ul>\n<li>\u4f7f\u7528\u5185\u5b58\u4e13\u7528\u578b VPS \u6216\u4e13\u5c5e\u5185\u5b58\u914d\u7f6e\uff0c\u907f\u514d\u4e0e\u90bb\u5c45\u4e89\u62a2\u3002<\/li>\n<li>\u542f\u7528 Redis \u6301\u4e45\u5316\u7b56\u7565\u4e0e\u5185\u5b58\u6dd8\u6c70\u7b56\u7565\u9632\u6b62 OOM\u3002<\/li>\n<\/ul>\n<h2>\u6269\u5c55\u65b9\u5f0f\u7684\u4f18\u52a3\u5bf9\u6bd4<\/h2>\n<p>\u5728\u9009\u62e9\u6269\u5c55\u7b56\u7565\u65f6\uff0c\u9700\u5728\u6210\u672c\u3001\u53ef\u9760\u6027\u4e0e\u6027\u80fd\u4e4b\u95f4\u6743\u8861\uff1a<\/p>\n<ul>\n<li><strong>\u8d2d\u4e70\u66f4\u5927\u89c4\u683c\uff08\u5782\u76f4\u6269\u5c55\uff09<\/strong>\uff1a\u5b9e\u73b0\u7b80\u5355\u3001\u5ef6\u8fdf\u4f4e\uff0c\u4f46\u6210\u672c\u7ebf\u6027\u4e0a\u5347\uff0c\u53d7\u5bbf\u4e3b\u786c\u4ef6\u9650\u5236\u3002<\/li>\n<li><strong>\u6c34\u5e73\u6269\u5c55<\/strong>\uff1a\u6269\u5c55\u6027\u597d\u3001\u5bb9\u9519\u6027\u9ad8\uff0c\u4f46\u67b6\u6784\u590d\u6742\u5ea6\u548c\u6570\u636e\u4e00\u81f4\u6027\u7ba1\u7406\u6210\u672c\u4e0a\u6da8\u3002<\/li>\n<li><strong>\u52a8\u6001\u5185\u5b58\uff08\u70ed\u6269\u5bb9\uff09<\/strong>\uff1a\u5bf9\u7a81\u53d1\u6d41\u91cf\u53cb\u597d\uff0c\u4f46\u9700\u670d\u52a1\u5546\u652f\u6301\u4e14\u5b58\u5728\u517c\u5bb9\u6027\u95ee\u9898\u3002<\/li>\n<\/ul>\n<h2>\u9009\u8d2d\u9999\u6e2fVPS\u65f6\u7684\u5b9e\u7528\u5efa\u8bae<\/h2>\n<p>\u5728\u8d2d\u4e70\u9999\u6e2f\u670d\u52a1\u5668\u6216\u8003\u8651\u7f8e\u56fdVPS 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