0

On my Server both APC and Memcached is installed. I have enabled both caching system one by one from local.xml each time.

In both cases I have checked site speed from Google Page Speed and Gtmetrix Speed test but its showing tha same grade as previous.

Here my question is: How can I check site performance after enabled APC OR Memcached. Or How can I check its working fine or not.

Please Help !!

3

Pankaj,

Contrary to popular belief, neither using APC or Memcache as cache/session backends will make a noticeable difference to single-user page load time - unless you had a disk I/O bottleneck to begin with (meaning that the memory backed cache will outperform the slow disk based cache).

If you don't have I/O issues, then enabling them won't make a difference to the actual page load time.

Where they'll come into play is in high concurrency situations, synthetic benchmarks like Siege/AB will demonstrate this very clearly, with an almost 50% increase in request/s. How this translates to real-world performance however, isn't so dramatic.

You'll know if it is working if the var/cache directory is empty, and if using Memcache for sessions, if the var/session directory is empty.

If you use file-backed slow_backend, then you'll still see cache tag data created in var/cache - but not the cache data itself.


Bottom line, if you are trying to improve page-load time performance, changing the cache store isn't going to make a noticeable difference unless your server's HDDs are so contrained that serving files from disk is a bottleneck.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.