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Try it again with just the last step(vanilla apache/vanilla wordpress/varnish) what are your results like? Keep the original setup and have your test script pe

• dugmartin 15y ago
  I think the main difference between using Apache vs nginx as the backend server would be the amount of memory available for Varnish to use for caching. nginx has a much smaller memory footprint.
  • cd34 15y ago
    apache-prefork has a larger footprint because it includes the php interpreter in each thread. If he's using php-fpm, he would use mpm-worker in which case apache and nginx threads have a similar memory footprint.
• EwanToo 15y ago
  Just tried: This rush generated 7,363 successful hits in 1.0 min and we transferred 56.39 MB of data in and out of your app. The average hit rate of 117/second translates to about 10,159,286 hits/day. So you're right in that Varnish is the big improvement, but the CPU of the server seemed to be significantly higher with varnish alone than with varnish + APC. Of course, one issue with these systems is there's no such thing as vanilla, the documentation goes from "Install" to "Read 100 pages of stuff to get a working configuration", with nothing in between...