RE: Degrading Hit Ratios

From: fatman <>
Date: Tue, 14 Oct 1997 23:26:53 +1000 (EST)

On Tue, 14 Oct 1997, Larmour, Jonathan wrote:

> Are (some of) your users going to the parent directly? If so, then
> the hits will be less on the small cache as it is being circumvented.
   already checked that, no user know of the second cache, and they have
been denied in the ACL.

> Of course, are you looking at the _total_ hits? Now you've split
> things into two, the parent cache will get less hits as most of the
> hits will be satisfied by the child cache. To find out the overall
> hit ratio, you have to add the hits of the child cache to the hits of
> the parent cache, and divide this by the number of requests of the
> child cache (unless there are other caches in the hierarchy).
   thats actualy diffrent from what i have, the parent has a 25% hit
rate, while the smaller one has only 15%... but mabey just my maths are
bad, is that a total 40% hit rate, or only 20% ?

> I imagine you are doing this to save memory. Certainly I've already
> been stung by the multiple IE4 downloads from different sites!
   Ahh, we were luckaly saved from this, one user d/l'ed ie, when we
quickly threw it on our ftp site.

Received on Tue Oct 14 1997 - 06:28:36 MDT

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