Another way to look at it is how many page requests Squid/Varnish can eliminate from Apache. In our MediaWiki Squid has an average cache hit rate of 85% which means the Apache page requests is 6.5x smaller. For small wikis this isn't a big deal but as you scale up reducing Apache requests by a factor of 6 is huge. Since RationalWiki appears to be kinda of in the middle you just have to ask yourself whether page access numbers or the Apache load is more important.
On 15 October 2012 10:32, Chad innocentkiller@gmail.com wrote:
There's a lot more to it than that, and it is indeed a performance drain (which is why we don't use it at WMF). Each pageview writes to the hitcounter table. Every so often the page table is updated with the hits from hitcounter.
Sure, displaying the hits is a simple query to the page table, but updating hitcounter each pageview just does not scale.
-Chad
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