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I am experiencing high CPU usage here is the stats i got from server, the consumption after every restart in 15 minutes go upto 100%, what could go wrong?

I have a site in laravel installed on the server which does not have much traffic(+- 500 users), here is the stats that i got from using top command in server.

top - 19:23:15 up 1 day, 10:55, 1 user, load average: 207.49, 204.19, 190.39 Tasks: 1303 total, 143 running, 1144 sleeping, 16 stopped, 0 zombie Cpu(s): 81.4%us, 7.2%sy, 0.0%ni, 8.4%id, 0.0%wa, 0.0%hi, 0.4%si, 2.6%st Mem: 33012284k total, 23683980k used, 9328304k free, 399100k buffers Swap: 0k total, 0k used, 0k free, 5473208k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 7302 nginx 20 0 445m 23m 6392 R 6.9 0.1 0:06.87 php-fpm 7538 nginx 20 0 450m 27m 6412 D 6.9 0.1 0:07.86 php-fpm 7169 nginx 20 0 444m 22m 6580 S 6.4 0.1 0:07.30 php-fpm 7138 nginx 20 0 443m 21m 6008 S 5.9 0.1 0:06.84 php-fpm 7185 nginx 20 0 443m 21m 5984 R 5.4 0.1 0:06.67 php-fpm 7229 nginx 20 0 443m 22m 6376 R 5.4 0.1 0:06.70 php-fpm 7462 nginx 20 0 443m 21m 6340 R 5.4 0.1 0:07.06 php-fpm 7474 nginx 20 0 448m 25m 6464 R 5.4 0.1 0:06.93 php-fpm 7632 nginx 20 0 447m 25m 6664 R 5.4 0.1 0:06.81 php-fpm 7772 nginx 20 0 447m 24m 6208 R 5.4 0.1 0:06.38 php-fpm 7921 nginx 20 0 446m 24m 6372 R 5.4 0.1 0:04.36 php-fpm 8187 nginx 20 0 440m 15m 3612 R 5.4 0.0 0:00.12 php-fpm 55 root 20 0 0 0 0 S 4.9 0.0 43:25.75 events/4 7119 nginx 20 0 443m 21m 6320 S 4.9 0.1 0:07.17 php-fpm 7137 nginx 20 0 443m 21m 6360 S 4.9 0.1 0:07.35 php-fpm 7143 nginx 20 0 446m 24m 6380 R 4.9 0.1 0:07.22 php-fpm 7215 nginx 20 0 443m 21m 6296 R 4.9 0.1 0:06.40 php-fpm 7296 nginx 20 0 443m 21m 5932 S 4.9 0.1 0:07.16 php-fpm 7388 nginx 20 0 443m 21m 6336 R 4.9 0.1 0:07.48 php-fpm 7411 nginx 20 0 446m 24m 6436 R 4.9 0.1 0:06.77 php-fpm 7576 nginx 20 0 447m 24m 6232 S 4.9 0.1 0:07.31 php-fpm 7662 nginx 20 0 443m 21m 6412 R 4.9 0.1 0:06.47 php-fpm 7838 nginx 20 0 445m 23m 6416 D 4.9 0.1 0:05.86 php-fpm 7887 nginx 20 0 443m 21m 6352 D 4.9 0.1 0:05.95 php-fpm 7896 nginx 20 0 446m 24m 6164 R 4.9 0.1 0:05.24 php-fpm 7941 nginx 20 0 447m 25m 6252 D 4.9 0.1 0:04.47 php-fpm 8049 nginx 20 0 443m 20m 4800 R 4.9 0.1 0:06.69 php-fpm 8163 nginx 20 0 440m 17m 5740 R 4.9 0.1 0:00.75 php-fpm 8167 nginx 20 0 447m 23m 4396 R 4.9 0.1 0:00.96 php-fpm 61 root 20 0 0 0 0 S 4.5 0.0 44:40.33 events/10 7059 nginx 20 0 443m 21m 6276 R 4.5 0.1 0:06.66 php-fpm 7125 nginx 20 0 446m 24m 6396 S 4.5 0.1 0:07.55 php-fpm 7205 nginx 20 0 443m 21m 6400 S 4.5 0.1 0:06.86 php-fpm 7279 nginx 20 0 448m 25m 6408 S 4.5 0.1 0:06.99 php-fpm 7514 nginx 20 0 443m 21m 6412 R 4.5 0.1 0:06.83 php-fpm 7546 nginx 20 0 447m 25m 6548 R 4.5 0.1 0:06.88 php-fpm 7571 nginx 20 0 448m 26m 6320 R 4.5 0.1 0:07.16 php-fpm 7574 nginx 20 0 444m 22m 6648 R 4.5 0.1 0:06.37 php-fpm 7583 nginx 20 0 446m 24m 6328 S 4.5 0.1 0:06.87 php-fpm
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  • It would help to provide the nginx and php configuration, plus any relevant log entries. Commented Oct 8, 2014 at 3:14

1 Answer 1

Reset to default
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It looks like some php code is running too slow to keep up with the load. It also appears that far too many php-fpm processes are being spawned.

Look at the configuration for pm.max_children. Try setting it to 5 or 10 and monitoring CPU usage. Once you know the CPU usage you may be able to calculate a new value by dividing 80 by the average CPU percentage. That may be a good starting point.

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