AH00161: server reached MaxRequestWorkers setting, consider raising the MaxRequestWorkers setting

Question

I\'ve got a quite busy server: PHP (Wordpress) using W3TotalCache APC, Varnish for Apache and Cloudflare to handle all traffic. Ubuntu 14.04.4 LTS

Only one website with

Answer 1

I also tried to increase MaxRequestWorkers on my server, and I was not seeing any effect. I realized what was going on when I ran "httpd" from the command line, it gave me this warning:

AH00180: WARNING: MaxRequestWorkers of 512 exceeds ServerLimit value of
 256 servers, decreasing MaxRequestWorkers to 256.
 To increase, please see the ServerLimit directive.

In your config, ServerLimit is still 256, so MaxRequestWorkers is capped by this value too.