sar -u 1 5\r\n\r\nsar -q 1 5 # \u8ca0\u8f09\u5e73\u5747\u503c\u76e3\u63a7\r\n\r\nsar -r 1 5 # \u8a18\u61b6\u9ad4\u4f7f\u7528\u7387<\/code><\/pre>\n<\/li>\n
pidstat – \u7a0b\u5e8f\u76e3\u63a7\n
pidstat -u 1 5 # CPU\u7d71\u8a08\r\n\r\npidstat -r 1 5 # \u8a18\u61b6\u9ad4\u7d71\u8a08<\/code><\/pre>\n<\/li>\n<\/ol>\n
\u9019\u4e9b\u547d\u4ee4\u63d0\u4f9b\u4e86\u7cfb\u7d71\u8cc7\u6e90\u4f7f\u7528\u60c5\u6cc1\u7684\u7cbe\u78ba\u6d1e\u5bdf\uff0c\u80fd\u5920\u6e96\u78ba\u8b58\u5225\u6548\u80fd\u74f6\u9838\u548c\u8cc7\u6e90\u6d88\u8017\u904e\u591a\u7684\u7a0b\u5e8f\u3002<\/p>\n
\u9032\u968e\u6545\u969c\u6392\u9664\u65b9\u6cd5<\/strong><\/h2>\n
\u5be6\u65bd\u7cfb\u7d71\u5316\u7684\u65b9\u6cd5\u78ba\u4fdd\u4e0d\u6703\u5ffd\u7565\u4efb\u4f55\u6f5b\u5728\u554f\u984c\u3002\u6211\u5011\u7684\u8a73\u7d30\u8a3a\u65b7\u6846\u67b6\u57fa\u65bc\u591a\u5e74\u7ba1\u7406\u9ad8\u6d41\u91cf\u4f3a\u670d\u5668\u79df\u7528\u74b0\u5883\u7684\u7d93\u9a57\uff1a<\/p>\n
1. \u521d\u59cb\u7cfb\u7d71\u5206\u6790<\/h3>\n
\n
\u76e3\u63a7\u8ca0\u8f09\u5e73\u5747\u503c\u4e26\u9032\u884c\u8a73\u7d30\u5206\u6790\uff1a\n
cat \/proc\/loadavg\r\n\r\nuptime\r\n\r\nvmstat 1 5<\/code><\/pre>\n<\/li>\n
\u6aa2\u67e5\u7a0b\u5e8f\u72c0\u614b\u548c\u8cc7\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\u7d71\u65e5\u8a8c\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
\u6aa2\u67e5CPU\u7279\u5b9a\u6307\u6a19\uff1a\n
mpstat -P ALL 1 5\r\n\r\niostat -xz 1 5<\/code><\/pre>\n<\/li>\n<\/ul>\n
2. \u7db2\u8def\u6d41\u91cf\u8abf\u67e5<\/h3>\n
\u9ad8CPU\u4f7f\u7528\u7387\u7d93\u5e38\u8207\u7db2\u8def\u6d3b\u52d5\u76f8\u95dc\u3002\u6211\u5011\u7684\u7d9c\u5408\u7db2\u8def\u5206\u6790\u5de5\u5177\u5305\u62ec\uff1a<\/p>\n
\n
\u6aa2\u67e5\u76ee\u524d\u9023\u7dda\u548c\u72c0\u614b\uff1a\n
netstat -tunap | grep ESTABLISHED\r\n\r\nss -tunapw | grep ESTAB<\/code><\/pre>\n<\/li>\n
\u76e3\u63a7\u7db2\u8def\u6d41\u91cf\u6a21\u5f0f\uff1a\n
iftop -P\r\n\r\nnethogs eth0<\/code><\/pre>\n<\/li>\n
\u8b58\u5225\u53ef\u7591\u9023\u7dda\u548c\u6f5b\u5728\u5a01\u8105\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
\u6548\u80fd\u512a\u5316\u6280\u8853<\/strong><\/h2>\n
\u5728\u8b58\u5225\u51fa\u6839\u672c\u539f\u56e0\u5f8c\uff0c\u5be6\u65bd\u9019\u4e9b\u7d93\u904e\u5be6\u6230\u6aa2\u9a57\u7684\u512a\u5316\u7b56\u7565\uff1a<\/p>\n
\n
\u7a0b\u5e8f\u7ba1\u7406\u548c\u512a\u5148\u6b0a\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\u89aa\u548c\u6027<\/code><\/pre>\n<\/li>\n
\u8cc7\u6e90\u9650\u5236\u548c\u63a7\u5236\u7fa4\u7d44\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\u7d71\u8abf\u6821\u548c\u512a\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
\u7d50\u8ad6\u548c\u6700\u4f73\u5be6\u52d9<\/strong><\/h2>\n
\u5728\u4f3a\u670d\u5668\u79df\u7528\u74b0\u5883\u4e2d\u6709\u6548\u7684CPU\u4f7f\u7528\u7387\u7ba1\u7406\u9700\u8981\u5c07\u61c9\u8b8a\u5f0f\u6545\u969c\u6392\u9664\u8207\u4e3b\u52d5\u76e3\u63a7\u76f8\u7d50\u5408\u7684\u6574\u9ad4\u65b9\u6cd5\u3002\u6211\u5011\u7ba1\u7406\u6578\u5343\u53f0\u4f3a\u670d\u5668\u7684\u7d93\u9a57\u6559\u6703\u6211\u5011\u9019\u4e9b\u95dc\u9375\u6210\u529f\u56e0\u7d20\uff1a<\/p>\n
\n
\u5b9a\u671f\u7cfb\u7d71\u7a3d\u6838\u53ef\u9632\u6b62\u6548\u80fd\u4e0b\u964d\u4e26\u53ca\u65e9\u8b58\u5225\u6f5b\u5728\u554f\u984c<\/li>\n
\u5177\u6709\u667a\u6167\u544a\u8b66\u529f\u80fd\u7684\u81ea\u52d5\u5316\u76e3\u63a7\u80fd\u5920\u5feb\u901f\u56de\u61c9\u65b0\u51fa\u73fe\u7684\u554f\u984c<\/li>\n
\u9069\u7576\u7684\u8cc7\u6e90\u5206\u914d\u548c\u5bb9\u91cf\u898f\u5283\u53ef\u9632\u6b62CPU\u74f6\u9838<\/li>\n
\u8a18\u9304\u6545\u969c\u6392\u9664\u6b65\u9a5f\u548c\u89e3\u6c7a\u65b9\u6848\u6709\u52a9\u65bc\u672a\u4f86\u7684\u8a3a\u65b7<\/li>\n
\u5b9a\u671f\u6548\u80fd\u57fa\u6e96\u6e2c\u8a66\u6709\u52a9\u65bc\u7dad\u6301\u6700\u4f73\u7cfb\u7d71\u5065\u5eb7\u72c0\u6cc1<\/li>\n
\u6301\u7e8c\u7684\u54e1\u5de5\u57f9\u8a13\u78ba\u4fdd\u5c0d\u65b0\u5de5\u5177\u548c\u6280\u8853\u7684\u6709\u6548\u554f\u984c\u89e3\u6c7a\u80fd\u529b<\/li>\n<\/ul>\n
\u901a\u904e\u9075\u5faa\u9019\u4efd\u6280\u8853\u6307\u5357\uff0c\u4f3a\u670d\u5668\u7ba1\u7406\u54e1\u53ef\u4ee5\u5728\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u74b0\u5883\u4e2d\u7dad\u6301\u6700\u4f73CPU\u6548\u80fd\uff0c\u540c\u6642\u78ba\u4fdd\u7cfb\u7d71\u7a69\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002\u8acb\u8a18\u4f4f\u8981\u5b9a\u671f\u66f4\u65b0\u76e3\u63a7\u5de5\u5177\uff0c\u6839\u64da\u5177\u9ad4\u7684\u4f3a\u670d\u5668\u5de5\u4f5c\u8ca0\u8f09\u8abf\u6574\u95be\u503c\uff0c\u4e26\u4fdd\u6301\u5b8c\u6574\u7684\u512a\u5316\u5de5\u4f5c\u6587\u4ef6\u8a18\u9304\u3002\u9019\u7a2e\u4e3b\u52d5\u65b9\u6cd5\u5c07\u5e6b\u52a9\u60a8\u9818\u5148\u65bc\u6548\u80fd\u554f\u984c\uff0c\u70ba\u5ba2\u6236\u7dad\u6301\u9ad8\u54c1\u8cea\u7684\u4f3a\u670d\u5668\u79df\u7528\u670d\u52d9\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=””]  […]<\/p>\n
Read More…<\/a><\/p>\n","protected":false},"author":2,"featured_media":29518,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4815],"tags":[9786,9787,9788,6553,1242],"class_list":["post-29533","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-america-dedicated-server-tc","tag-server-cpu-usage","tag-hosting-server-troubleshooting","tag-cpu-optimization","tag-system-monitoring-tc","tag-server-performance-tc"],"acf":[],"yoast_head":"\n