Scaling-out WordPress – Performance Measures – Cache influence

Cache Influence on req/sec

Results overview

There is a classical method to increase the performance of web site that consists in caching the HTML pages that are rendering to the client.
That avoids the server to execute the code to request the database and to render the page. The pre-formatted HTML page is generally stored in the file system.
I would like to try it with this workload (that is perfect for caching because there is no specific information linked to the visitor).

I could use many methods:

  • caching with apache
  • caching with varnish
  • caching with a specialized PHP code

I decided to use the third method as there are a lot of existing WordPress plugins that do the job.
I installed the wp super cache plugin and did a new series of tests.
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