(I googled and searched this forum for hours, found some topics, but none of them worked for me)
I'm using Wordpress with: Varnish + Nginx + PHP-FPM + APC + W3 Total Cache + PageSpeed.
As I'm using Varnish, first time I call www.mysite.com it use just 10% of CPU. Calling the second time, it will be cached. The problem is passing request parameter in URL.
For just 1 request (www.mysite.com?1=1) it shows in
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 7609 nginx 20 0 438m 41m 28m S 11.6 7.0 0:00.35 php-fpm 7606 nginx 20 0 437m 39m 26m S 10.3 6.7 0:00.31 php-fpm
After the page is fully loaded, these processes above are still active. And after 2 seconds, they are replaced by another 2 php-fpm processes(below), which are active for 3 seconds.
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 7665 nginx 20 0 444m 47m 28m S 20.9 7.9 0:00.69 php-fpm 7668 nginx 20 0 444m 46m 28m R 20.9 7.9 0:00.63 php-fpm
40% CPU usage just for 1 request not cached!
- CPU usage is higher after the page was loaded
- When I purged the cache (W3 and Varnish), it take just 10% of CPU to load a not cached page
- This high CPU usage just happend passing request parameter or in Wordpress Admin
When I try to do 10 request(pressing F5 key 10x), the server stop serving and in php-fpm log appears:
WARNING: [pool www] server reached max_children setting (10), consider raising it
I raised that value to 20, same problem.
Inittialy I was using
pm.max_requests=500) and it happened the same problem.
Anyone could help, plz? Any help would be appreciated!
- APC is ON (98% Hits, 2% Misses)
- Server is Amazon Micro (613MB RAM)
- PHP 5.3.26 (fpm-fcgi)
- Linux version 3.4.48-45.46.amzn1.x86_64 Red Hat 4.6.3-2 (I think it's based on CentOS 5)