Thread:Project:Support desk/ Novice Caching Advice Needed!/reply (4)

The point of varnish is not just to make it easier to serve static files, its also to separate static and dynamic load between different servers (Also file cache is not serving static files, a short php script must run to make sure that the file in question is still appropriate to serve). There are a lot of CDN services, its hard to say, but probably. I imagine it varries depending on the CDN. Squid/varnish serve much the same purpose as a CDN.

> images/cache/*. Is that were they should be ending up?

The default is in the cache directory, not images/cache. Where they are doesn't matter that much.

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If you're really concerned about your CPU usage, you need to do profiling to figure out which part is slow (Well first you should use something like top to make sure that php is really the one using all the cpu). Maybe there's something totally unrelated to caching that is misconfigured causing slowness, who knows. Running profiling will allow you (or us once you post it) to determine what is slow, which will allow us to figure out what part needs to be fixed.