{"id":209114,"date":"2025-09-30T05:23:34","date_gmt":"2025-09-29T21:23:34","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209114\/"},"modified":"2025-09-30T05:23:35","modified_gmt":"2025-09-29T21:23:35","slug":"vps-194","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209114\/","title":{"rendered":"\u9999\u6e2fVPS\u5185\u5b58\u6cc4\u6f0f\u5b9e\u6218\uff1a\u5feb\u901f\u5b9a\u4f4d\u4e0e\u5f7b\u5e95\u4fee\u590d"},"content":{"rendered":"<h2>\u5f15\u8a00<\/h2>\n<p>\u5185\u5b58\u6cc4\u6f0f\u662f\u4efb\u4f55\u957f\u671f\u8fd0\u884c\u670d\u52a1\u7684\u5669\u68a6\uff0c\u5c24\u5176\u5728\u8d44\u6e90\u6709\u9650\u7684 VPS \u73af\u5883\u4e2d\u66f4\u5bb9\u6613\u5bfc\u81f4\u670d\u52a1\u4e0d\u53ef\u7528\u3002\u5bf9\u4e8e\u6258\u7ba1\u5728\u9999\u6e2f VPS 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\u89c2\u5bdf\uff1a\u5feb\u901f\u5224\u65ad\u662f\u5426\u4e3a\u6cc4\u6f0f<\/h3>\n<ul>\n<li>\u4f7f\u7528 top\u3001htop\u3001free\u3001vmstat \u67e5\u770b\u6574\u4f53\u5185\u5b58\u8d8b\u52bf\u4e0e swap \u4f7f\u7528\u7387\u3002<\/li>\n<li>\u76d1\u63a7\u8fdb\u7a0b\u5185\u5b58\uff1aps aux &#8211;sort=-rss \/ pmap -x PID \u67e5\u770b\u5177\u4f53\u8fdb\u7a0b\u5360\u7528\u3002<\/li>\n<li>\u8bb0\u5f55\u5386\u53f2\u6570\u636e\uff1a\u5982\u679c\u662f\u751f\u4ea7\u73af\u5883\uff0c\u4f9d\u8d56 Prometheus + node_exporter\u3001Grafana \u4fdd\u5b58\u957f\u671f\u6307\u6807\u53ef\u4ee5\u8fc5\u901f\u786e\u8ba4\u5185\u5b58\u968f\u65f6\u95f4\u7ebf\u6027\u589e\u957f\u7684\u8d8b\u52bf\u3002<\/li>\n<\/ul>\n<h3>2. \u6355\u83b7\u73b0\u573a\uff1a\u5728\u589e\u957f\u671f\u95f4\u91c7\u6837<\/h3>\n<ul>\n<li>\/proc\/PID\/status \u4e0e \/proc\/PID\/smaps\uff1a\u53ef\u83b7\u53d6\u6bcf\u4e2a\u8fdb\u7a0b\u7684\u5185\u5b58\u6620\u5c04\u4e0e RSS\u3001PSS \u7b49\u7ec6\u8282\u3002<\/li>\n<li>gcore \u751f\u6210 core dump\uff08\u9700\u8c28\u614e\uff0c\u53ef\u80fd\u5360\u5927\u91cf\u78c1\u76d8\uff09\uff0c\u65b9\u4fbf\u79bb\u7ebf\u5206\u6790\u3002<\/li>\n<li>\u5bf9\u4e8e\u5bb9\u5668\/\u7cfb\u7edf\uff0c\u4f7f\u7528 cgroups \u72b6\u6001\u6216 systemd-cgtop \u89c2\u5bdf\u9650\u5236\u4e0e\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<h3>3. \u5206\u6790\uff1a\u8bed\u8a00\u4e0e\u5de5\u5177\u5bf9\u5e94\u7684\u6df1\u5c42\u5206\u6790<\/h3>\n<ul>\n<li>C\/C++\uff1a\u4f7f\u7528 Valgrind\uff08memcheck\u3001massif\uff09\u5b9a\u4f4d\u52a8\u6001\u5185\u5b58\u5206\u914d\u95ee\u9898\uff1bpmap + GDB \u5bf9\u8c61\u68c0\u67e5\uff1bjemalloc \u6216 tcmalloc \u7684\u7edf\u8ba1\u4e0e heap profiler\uff08jeprof\/tcmalloc\uff09\u80fd\u63d0\u4f9b\u5806\u6837\u672c\u3002<\/li>\n<li>Java\uff1a\u5f00\u542f -XX:+HeapDumpOnOutOfMemoryError \u6216\u4f7f\u7528 jmap \u5bfc\u51fa\u5806\u5feb\u7167\uff0c\u7528 Eclipse MAT\uff08Memory Analyzer\uff09\u5206\u6790\u5bf9\u8c61\u4fdd\u7559\u8def\u5f84\u4e0e\u6cc4\u6f0f\u7591\u70b9\uff1b\u89c2\u5bdf GC \u65e5\u5fd7\uff08-Xlog:gc* \u6216\u4f20\u7edf GC \u65e5\u5fd7\uff09\u5224\u65ad\u8001\u5e74\u4ee3\u589e\u957f\u6a21\u5f0f\u3002<\/li>\n<li>Go\uff1aruntime\/pprof \u7684 heap profile\uff0cpprof web \u5c55\u793a\u5206\u914d\u70ed\u70b9\uff1b\u6ce8\u610f GC \u4e0e\u9003\u9038\u5206\u6790\u3002<\/li>\n<li>Node.js\uff1a\u4f7f\u7528 &#8211;inspect \u4e0e heapdump\u3001clinic\/heapprofile\u3001node-heapdump \u5bfc\u51fa heap snapshot\uff0c\u5728 Chrome-devtools \u4e2d\u5206\u6790\u95ed\u5305\u4e0e\u4fdd\u6301\u7684\u5f15\u7528\u3002<\/li>\n<li>PHP\uff08FPM\uff09\uff1a\u5229\u7528 zend_memory_peak_usage\u3001xdebug \u7684\u5806\u6808\u5206\u6790\u6216\u4f7f\u7528 Valgrind \u5bf9\u6269\u5c55\u8fdb\u884c\u68c0\u6d4b\uff1b\u6ce8\u610f opcode cache\uff08OPcache\uff09\u4ee5\u53ca\u6269\u5c55\uff08\u5982 gd\u3001imagick\uff09\u7684\u6cc4\u6f0f\u3002<\/li>\n<li>\u7cfb\u7edf\u7ea7\uff1a\u4f7f\u7528 perf\u3001bcc\/eBPF\uff08\u5982 memleak\u3001heaptrack \u6216 BPFtrace \u811a\u672c\uff09\u8fdb\u884c\u5185\u6838\u4e0e\u7528\u6237\u6001\u8ffd\u8e2a\uff0c\u9002\u7528\u4e8e\u590d\u6742\u573a\u666f\u3002<\/li>\n<\/ul>\n<h3>4. \u9a8c\u8bc1\u4e0e\u56de\u5f52\u6d4b\u8bd5<\/h3>\n<ul>\n<li>\u4fee\u590d\u540e\u5728\u540c\u6837\u8d1f\u8f7d\u73af\u5883\u4e0b\u590d\u73b0\u6d4b\u8bd5\uff0c\u89c2\u5bdf\u5185\u5b58\u66f2\u7ebf\u662f\u5426\u8d8b\u4e8e\u7a33\u5b9a\u3002<\/li>\n<li>\u4f7f\u7528\u538b\u529b\u6d4b\u8bd5\u5de5\u5177\uff08ab\u3001wrk\u3001siege\u3001JMeter\uff09\u5728\u9884\u671f\u6d41\u91cf\u4e0b\u9a8c\u8bc1\u3002<\/li>\n<li>\u82e5\u65e0\u6cd5\u5b8c\u5168\u4fee\u590d\uff0c\u8003\u8651\u8bbe\u7f6e\u5408\u7406\u7684\u91cd\u542f\u7b56\u7565\u6216\u5185\u5b58\u4e0a\u9650\uff08systemd \u7684 MemoryMax\uff0c\u6216\u5bb9\u5668\u7684 memory limit\uff09\uff0c\u9632\u6b62\u670d\u52a1\u56e0\u5185\u5b58\u8017\u5c3d\u5d29\u6e83\u3002<\/li>\n<\/ul>\n<h2>\u4fee\u590d\u7b56\u7565\u4e0e\u5b9e\u8df5\u7ec6\u8282<\/h2>\n<p>\u5728\u5b9a\u4f4d\u5230\u6cc4\u6f0f\u70b9\u540e\uff0c\u4fee\u590d\u7b56\u7565\u901a\u5e38\u5305\u62ec\u4ee3\u7801\u5c42\u9762\u4fee\u590d\u3001\u8fd0\u884c\u65f6\u914d\u7f6e\u4f18\u5316\u4e0e\u4e34\u65f6\u7f13\u89e3\u63aa\u65bd\u4e09\u7c7b\u3002<\/p>\n<h3>\u4ee3\u7801\u5c42\u9762\u7684\u5f7b\u5e95\u4fee\u590d<\/h3>\n<ul>\n<li>\u91ca\u653e\u6240\u6709\u624b\u52a8\u5206\u914d\u7684\u5185\u5b58\uff0c\u907f\u514d\u60ac\u6302\u6307\u9488\u4e0e\u53cc\u91cd free\u3002<\/li>\n<li>\u6539\u8fdb\u6570\u636e\u7ed3\u6784\uff0c\u4f7f\u7528\u5f31\u5f15\u7528\u6216\u663e\u5f0f\u7f13\u5b58\u6e05\u7406\u7b56\u7565\uff08LRU\u3001TTL\uff09\u3002<\/li>\n<li>\u4fee\u590d\u957f\u751f\u547d\u5468\u671f\u5bf9\u8c61\u5f15\u7528\u95ee\u9898\uff0c\u4f8b\u5982\u961f\u5217\u3001\u5355\u4f8b\u4e2d\u672a\u6e05\u7a7a\u7684\u5f15\u7528\u3002<\/li>\n<li>\u5347\u7ea7\u7b2c\u4e09\u65b9\u5e93\u5230\u65e0\u6cc4\u6f0f\u7248\u672c\u6216\u66ff\u6362\u6709\u95ee\u9898\u7684\u5e93\u3002<\/li>\n<\/ul>\n<h3>\u8fd0\u884c\u65f6\u4e0e\u914d\u7f6e\u4f18\u5316<\/h3>\n<ul>\n<li>\u8c03\u6574\u5783\u573e\u56de\u6536\u7b56\u7565\uff1aJava \u8c03\u6574\u5806\u5927\u5c0f\u3001G1\/Serial\/CMS \u7b49\uff1bGo \u8c03\u6574 GOGC\uff1bNode.js \u8c03\u6574 &#8211;max-old-space-size\u3002<\/li>\n<li>\u66ff\u6362 allocator\uff1a\u5728 C\/C++ \u4f7f\u7528 jemalloc \u53ef\u83b7\u5f97\u66f4\u597d\u7684\u53ef\u89c2\u6d4b\u6027\u4e0e\u5185\u5b58\u5229\u7528\uff0c\u90e8\u5206\u573a\u666f\u4e0b\u4e5f\u53ef\u7f13\u89e3\u788e\u7247\u95ee\u9898\u3002<\/li>\n<li>\u5bf9 PHP-FPM \u91c7\u7528 pm.max_children\u3001pm.max_requests \u8fdb\u884c\u8fdb\u7a0b\u56de\u6536\uff0c\u9632\u6b62\u957f\u671f\u8fd0\u884c\u8fdb\u7a0b\u7d2f\u79ef\u6cc4\u6f0f\u3002<\/li>\n<\/ul>\n<h3>\u4e34\u65f6\u7f13\u89e3\u63aa\u65bd\uff08\u5f53\u65e0\u6cd5\u7acb\u523b\u4fee\u590d\u65f6\uff09<\/h3>\n<ul>\n<li>\u8bbe\u7f6e OOM \u9632\u62a4\u4e0e\u81ea\u52a8\u91cd\u542f\u7b56\u7565\uff08systemd Restart=on-failure + MemoryMax\uff09\u3002<\/li>\n<li>\u4f7f\u7528\u76d1\u63a7\u544a\u8b66\uff08\u5185\u5b58\u4f7f\u7528\u7387\u9608\u503c\uff09\u89e6\u53d1\u81ea\u52a8\u6269\u5bb9\u6216\u5bb9\u5668\u91cd\u542f\u3002<\/li>\n<li>\u5728\u591a\u5730\u57df\u90e8\u7f72\u65f6\uff08\u5982\u9999\u6e2f\u670d\u52a1\u5668\u4e0e\u7f8e\u56fd\u670d\u52a1\u5668 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