sar -u 1 5\r\n\r\nsar -q 1 5 # \u8d1f\u8f7d\u5e73\u5747\u503c\u76d1\u63a7\r\n\r\nsar -r 1 5 # \u5185\u5b58\u4f7f\u7528\u7387<\/code><\/pre>\n<\/li>\n
pidstat – \u8fdb\u7a0b\u76d1\u63a7\n
pidstat -u 1 5 # CPU\u7edf\u8ba1\r\n\r\npidstat -r 1 5 # \u5185\u5b58\u7edf\u8ba1<\/code><\/pre>\n<\/li>\n<\/ol>\n
\u8fd9\u4e9b\u547d\u4ee4\u63d0\u4f9b\u4e86\u7cfb\u7edf\u8d44\u6e90\u4f7f\u7528\u60c5\u51b5\u7684\u7cbe\u786e\u6d1e\u5bdf\uff0c\u80fd\u591f\u51c6\u786e\u8bc6\u522b\u6027\u80fd\u74f6\u9888\u548c\u8d44\u6e90\u6d88\u8017\u8fc7\u591a\u7684\u8fdb\u7a0b\u3002<\/p>\n
\u9ad8\u7ea7\u6545\u969c\u6392\u9664\u65b9\u6cd5<\/strong><\/h2>\n
\u5b9e\u65bd\u7cfb\u7edf\u5316\u7684\u65b9\u6cd5\u786e\u4fdd\u4e0d\u4f1a\u5ffd\u7565\u4efb\u4f55\u6f5c\u5728\u95ee\u9898\u3002\u6211\u4eec\u7684\u8be6\u7ec6\u8bca\u65ad\u6846\u67b6\u57fa\u4e8e\u591a\u5e74\u7ba1\u7406\u9ad8\u6d41\u91cf\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u7684\u7ecf\u9a8c\uff1a<\/p>\n
1. \u521d\u59cb\u7cfb\u7edf\u5206\u6790<\/h3>\n
\n
\u76d1\u63a7\u8d1f\u8f7d\u5e73\u5747\u503c\u5e76\u8fdb\u884c\u8be6\u7ec6\u5206\u6790\uff1a\n
cat \/proc\/loadavg\r\n\r\nuptime\r\n\r\nvmstat 1 5<\/code><\/pre>\n<\/li>\n
\u68c0\u67e5\u8fdb\u7a0b\u72b6\u6001\u548c\u8d44\u6e90\u6d88\u8017\uff1a\n
ps aux | sort -rn -k 3 | head -10\r\n\r\nps -eo pid,ppid,cmd,%cpu,%mem --sort=-%cpu | head<\/code><\/pre>\n<\/li>\n
\u5206\u6790\u7cfb\u7edf\u65e5\u5fd7\u4e2d\u7684\u6a21\u5f0f\uff1a\n
tail -f \/var\/log\/syslog | grep -i \"cpu\\|load\\|memory\"\r\n\r\njournalctl -p err..emerg --since \"1 hour ago\"<\/code><\/pre>\n<\/li>\n
\u68c0\u67e5CPU\u7279\u5b9a\u6307\u6807\uff1a\n
mpstat -P ALL 1 5\r\n\r\niostat -xz 1 5<\/code><\/pre>\n<\/li>\n<\/ul>\n
2. \u7f51\u7edc\u6d41\u91cf\u8c03\u67e5<\/h3>\n
\u9ad8CPU\u4f7f\u7528\u7387\u7ecf\u5e38\u4e0e\u7f51\u7edc\u6d3b\u52a8\u76f8\u5173\u3002\u6211\u4eec\u7684\u7efc\u5408\u7f51\u7edc\u5206\u6790\u5de5\u5177\u5305\u62ec\uff1a<\/p>\n
\n
\u68c0\u67e5\u5f53\u524d\u8fde\u63a5\u548c\u72b6\u6001\uff1a\n
netstat -tunap | grep ESTABLISHED\r\n\r\nss -tunapw | grep ESTAB<\/code><\/pre>\n<\/li>\n
\u76d1\u63a7\u7f51\u7edc\u6d41\u91cf\u6a21\u5f0f\uff1a\n
iftop -P\r\n\r\nnethogs eth0<\/code><\/pre>\n<\/li>\n
\u8bc6\u522b\u53ef\u7591\u8fde\u63a5\u548c\u6f5c\u5728\u5a01\u80c1\uff1a\n
lsof -i | grep -i establish\r\n\r\ntcpdump -i any -n port 80 or port 443<\/code><\/pre>\n<\/li>\n<\/ol>\n
\u6027\u80fd\u4f18\u5316\u6280\u672f<\/strong><\/h2>\n
\u5728\u8bc6\u522b\u51fa\u6839\u672c\u539f\u56e0\u540e\uff0c\u5b9e\u65bd\u8fd9\u4e9b\u7ecf\u8fc7\u5b9e\u6218\u68c0\u9a8c\u7684\u4f18\u5316\u7b56\u7565\uff1a<\/p>\n
\n
\u8fdb\u7a0b\u7ba1\u7406\u548c\u4f18\u5148\u7ea7\u63a7\u5236\uff1a\n
nice -n 19 cpu_intensive_process\r\n\r\nrenice 10 process_pid\r\n\r\ntaskset -pc 0-2 process_pid # CPU\u4eb2\u548c\u6027<\/code><\/pre>\n<\/li>\n
\u8d44\u6e90\u9650\u5236\u548c\u63a7\u5236\u7ec4\uff1a\n
ulimit -n 65535\r\n\r\necho \"* soft nofile 65535\" >> \/etc\/security\/limits.conf\r\n\r\nsystemctl set-property httpd.service CPUQuota=85%<\/code><\/pre>\n<\/li>\n
\u7cfb\u7edf\u8c03\u4f18\u548c\u4f18\u5316\uff1a\n
sysctl -w net.core.somaxconn=65535\r\n\r\necho \"vm.swappiness = 10\" >> \/etc\/sysctl.conf\r\n\r\necho \"kernel.pid_max = 65536\" >> \/etc\/sysctl.conf<\/code><\/pre>\n<\/li>\n<\/ul>\n
\u7ed3\u8bba\u548c\u6700\u4f73\u5b9e\u8df5<\/strong><\/h2>\n
\u5728\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u4e2d\u6709\u6548\u7684CPU\u4f7f\u7528\u7387\u7ba1\u7406\u9700\u8981\u5c06\u54cd\u5e94\u5f0f\u6545\u969c\u6392\u9664\u4e0e\u4e3b\u52a8\u76d1\u63a7\u76f8\u7ed3\u5408\u7684\u6574\u4f53\u65b9\u6cd5\u3002\u6211\u4eec\u7ba1\u7406\u6570\u5343\u53f0\u670d\u52a1\u5668\u7684\u7ecf\u9a8c\u6559\u4f1a\u6211\u4eec\u8fd9\u4e9b\u5173\u952e\u6210\u529f\u56e0\u7d20\uff1a<\/p>\n
\n
\u5b9a\u671f\u7cfb\u7edf\u5ba1\u8ba1\u53ef\u9632\u6b62\u6027\u80fd\u4e0b\u964d\u5e76\u53ca\u65e9\u8bc6\u522b\u6f5c\u5728\u95ee\u9898<\/li>\n
\u5177\u6709\u667a\u80fd\u544a\u8b66\u529f\u80fd\u7684\u81ea\u52a8\u5316\u76d1\u63a7\u80fd\u591f\u5feb\u901f\u54cd\u5e94\u65b0\u51fa\u73b0\u7684\u95ee\u9898<\/li>\n
\u9002\u5f53\u7684\u8d44\u6e90\u5206\u914d\u548c\u5bb9\u91cf\u89c4\u5212\u53ef\u9632\u6b62CPU\u74f6\u9888<\/li>\n
\u8bb0\u5f55\u6545\u969c\u6392\u9664\u6b65\u9aa4\u548c\u89e3\u51b3\u65b9\u6848\u6709\u52a9\u4e8e\u672a\u6765\u7684\u8bca\u65ad<\/li>\n
\u5b9a\u671f\u6027\u80fd\u57fa\u51c6\u6d4b\u8bd5\u6709\u52a9\u4e8e\u7ef4\u6301\u6700\u4f73\u7cfb\u7edf\u5065\u5eb7\u72b6\u51b5<\/li>\n
\u6301\u7eed\u7684\u5458\u5de5\u57f9\u8bad\u786e\u4fdd\u5bf9\u65b0\u5de5\u5177\u548c\u6280\u672f\u7684\u6709\u6548\u95ee\u9898\u89e3\u51b3\u80fd\u529b<\/li>\n<\/ul>\n
\u901a\u8fc7\u9075\u5faa\u8fd9\u4efd\u6280\u672f\u6307\u5357\uff0c\u670d\u52a1\u5668\u7ba1\u7406\u5458\u53ef\u4ee5\u5728\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u4e2d\u7ef4\u6301\u6700\u4f73CPU\u6027\u80fd\uff0c\u540c\u65f6\u786e\u4fdd\u7cfb\u7edf\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002\u8bf7\u8bb0\u4f4f\u8981\u5b9a\u671f\u66f4\u65b0\u76d1\u63a7\u5de5\u5177\uff0c\u6839\u636e\u5177\u4f53\u7684\u670d\u52a1\u5668\u5de5\u4f5c\u8d1f\u8f7d\u8c03\u6574\u9608\u503c\uff0c\u5e76\u4fdd\u6301\u5b8c\u6574\u7684\u4f18\u5316\u5de5\u4f5c\u6587\u6863\u8bb0\u5f55\u3002\u8fd9\u79cd\u4e3b\u52a8\u65b9\u6cd5\u5c06\u5e2e\u52a9\u60a8\u9886\u5148\u4e8e\u6027\u80fd\u95ee\u9898\uff0c\u4e3a\u5ba2\u6237\u7ef4\u6301\u9ad8\u8d28\u91cf\u7684\u670d\u52a1\u5668\u79df\u7528\u670d\u52a1\u3002<\/p>\n
[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"
[vc_row][vc_column][vc_column_text css=””] \u5728\u7ba1\u7406\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u65f6\uff0c\u610f\u5916\u7684CPU\u5cf0\u503c\u4f1a\u663e\u8457\u5f71\u54cd\u6027\u80fd\u548c\u7528\u6237\u4f53\u9a8c\u3002\u4f5c\u4e3a\u7ecf\u9a8c\u4e30\u5bcc\u7684\u7cfb\u7edf\u7ba1\u7406\u5458\uff0c\u6211\u4eec\u6df1\u77e5\u9ad8\u6548\u7684CPU\u4f7f\u7528\u7387\u6545\u969c\u6392\u9664\u65e2\u9700\u8981\u7cfb\u7edf\u5316\u7684\u65b9\u6cd5\uff0c\u4e5f\u9700\u8981\u6df1\u539a\u7684\u6280\u672f\u77e5\u8bc6\u3002\u8fd9\u4efd\u5168\u9762\u7684\u6307\u5357\u63a2\u8ba8\u4e86\u5728\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u4e2d\u8bca\u65ad\u548c\u89e3\u51b3\u9ad8CPU\u4f7f\u7528\u7387\u95ee\u9898\u7684\u9ad8\u7ea7\u65b9\u6cd5\uff0c\u7ed3\u5408\u4e86\u884c\u4e1a\u6700\u4f73\u5b9e\u8df5\u548c\u6211\u4eec\u5728\u6570\u5343\u53f0\u670d\u52a1\u5668\u90e8\u7f72\u4e2d\u9047\u5230\u7684\u5b9e\u9645\u573a\u666f\u3002 \u9ad8CPU\u4f7f\u7528\u7387\u7684\u5e38\u89c1\u539f\u56e0 \u5728\u6df1\u5165\u6545\u969c\u6392\u9664\u6b65\u9aa4\u4e4b\u524d\uff0c\u8ba9\u6211\u4eec\u5148\u68c0\u67e5\u5bfc\u81f4\u670d\u52a1\u5668CPU\u5cf0\u503c\u7684\u5178\u578b\u573a\u666f\u3002\u4e86\u89e3\u8fd9\u4e9b\u6839\u672c\u539f\u56e0\u6709\u52a9\u4e8e\u7b80\u5316\u8bca\u65ad\u8fc7\u7a0b\u5e76\u66f4\u6709\u6548\u5730\u5b9e\u65bd\u6709\u9488\u5bf9\u6027\u7684\u89e3\u51b3\u65b9\u6848\uff1a \u5931\u63a7\u8fdb\u7a0b\u6216\u5e94\u7528\u7a0b\u5e8f\u5185\u5b58\u6cc4\u6f0f\u6d88\u8017\u8fc7\u591aCPU\u5468\u671f DDoS\u653b\u51fb\u6216\u5f02\u5e38\u6d41\u91cf\u6a21\u5f0f\u4f7f\u670d\u52a1\u5668\u8d44\u6e90\u8d85\u8d1f\u8377 \u6076\u610f\u8f6f\u4ef6\u6216\u52a0\u5bc6\u8d27\u5e01\u6316\u77ff\u64cd\u4f5c\u8fd0\u884c\u672a\u7ecf\u6388\u6743\u7684\u8fdb\u7a0b \u670d\u52a1\u5668\u8bbe\u7f6e\u6216\u670d\u52a1\u914d\u7f6e\u9519\u8bef\u5bfc\u81f4\u8d44\u6e90\u51b2\u7a81 \u786c\u4ef6\u9650\u5236\u6216\u70ed\u8282\u6d41\u5f71\u54cd\u6027\u80fd \u4f4e\u6548\u7684\u6570\u636e\u5e93\u67e5\u8be2\u5bfc\u81f4CPU\u8d1f\u8f7d\u8fc7\u9ad8 \u5e94\u7528\u7a0b\u5e8f\u4ee3\u7801\u4f18\u5316\u4e0d\u8db3\u5bfc\u81f4\u8d44\u6e90\u6d6a\u8d39 \u5728\u9ad8\u5cf0\u65f6\u6bb5\u8fd0\u884c\u5907\u4efd\u8fdb\u7a0b \u7cfb\u7edf\u66f4\u65b0\u548c\u7ef4\u62a4\u4efb\u52a1\u4e89\u7528\u8d44\u6e90 \u57fa\u672c\u8bca\u65ad\u547d\u4ee4\u548c\u5de5\u5177 \u4e3a\u4e86\u8fdb\u884c\u6709\u6548\u7684\u6545\u969c\u6392\u9664\uff0c\u6211\u4eec\u5c06\u5229\u7528\u5f3a\u5927\u7684Linux\u547d\u4ee4\u548c\u76d1\u63a7\u5de5\u5177\u3002\u8fd9\u4e9b\u5de5\u5177\u5728\u5404\u79cd\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u4e2d\u7ecf\u8fc7\u5b9e\u6218\u68c0\u9a8c\uff0c\u80fd\u63d0\u4f9b\u5173\u4e8e\u7cfb\u7edf\u884c\u4e3a\u7684\u5173\u952e\u6d1e\u5bdf\uff1a top – \u5b9e\u65f6\u8fdb\u7a0b\u76d1\u63a7 top -c -p $(pgrep -d’,’ php-fpm) top -b -n 1 | head -n 20 # \u6355\u83b7\u9876\u90e8\u8fdb\u7a0b\u5feb\u7167 htop – \u589e\u5f3a\u578b\u4ea4\u4e92\u5f0f\u8fdb\u7a0b\u67e5\u770b\u5668 htop –sort-key PERCENT_CPU htop -t # \u8fdb\u7a0b\u5173\u7cfb\u6811\u89c6\u56fe sar – \u7cfb\u7edf\u6d3b\u52a8\u62a5\u544a\u5668 sar -u 1 5 sar -q 1 […]<\/p>\n
Read More…<\/a><\/p>\n","protected":false},"author":2,"featured_media":29519,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4816],"tags":[9790,9789,9791,6555,1239],"class_list":["post-29534","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-america-dedicated-server-sc","tag-hosting-server-troubleshooting","tag-server-cpu-usage","tag-cpu-optimization","tag-system-monitoring-sc","tag-server-performance-sc"],"acf":[],"yoast_head":"\n