Re: LRU Rate

On Wed, 29 Apr 1998, kendall wrote:

> On Wed, 29 Apr 1998, Dancer wrote:
>
> > > How can I know an estimate rate of LRU replacement, that's
> > > actually occurring on my cache?
> >
> > Use the cache-manager cgi. The cache-information page will give you the
> > current, exact LRU value.
>
> once you have that value, how should you calculate the _rate_ at which
> squid is removing old objects, i.e. in Mb replaced per day?

Well, lets see. Assuming a cache size of n megabytes, a hit rate of m%,
and an LRU of x, I'd say your megs replaced per day would be about
MRPD=(n * ((100 - m)/100)) / x

So, 1000meg cache, 40% hit rate, LRU of 3 days is..
(1000 * ((100 - 40)/100)) / 3 = 200megs per day

Only approximate of course, since hit rate and LRU bounce around a lot.
Thats just off the top of my head. Haven't serious researched it or
anything.

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Received on Wed Apr 29 1998 - 09:22:51 MDT