Re: [squid-users] time to tune further??

oh thanks joe
and all this whil ei was under the impression that cache_mem also
includes swap.state which i beleive is the meta index of all the
cached objects
so for my 512 MB ram machine how large do you think my cache_dir
capacity should be .. large enuf and yet small to avoid swapping
rgds
khizcode

--- Joe Cooper <joe@swelltech.com> wrote:
> No. You've misunderstood me, Khiz.
>
> The ratio I mentioned is how much memory Squid /will/ use. Not how
> much
> you should configure in cache_mem. cache_mem is completely separate
> from the a amount needed by Squid to keep up with it's swap.state and
>
> other necessary stuff.
>
> cache_mem is for in-transit objects, hot objects and a few other odds
>
> and ends. You define it to be whatever you want, 2MB or 200MB, and
> Squid won't care--it will /still/ use about 10MB for each 1GB of
> cache_dir. cache_mem is used in addition to this memory.
>
> In some circumstances it may be appropriate to raise the cache_mem in
>
> order to improve performance. I've found that, if you have enough
> memory to spare, Squid can gain about 5%-10% improvement in overall
> throughput and response times from having a larger cache_mem setting
> (up
> to a certain point, dependent on your workload).
>
> But there is no correlation between cache_dir size and cache_mem
> size,
> and there doesn't need to be.
>
> khiz code wrote:
>
> > well Andre
> > maybe u r right
> > but as joe would put it the ratio is abt 10MB of ram to 1 GB
> cache_dir
> > guess i want to use a bit more of my 9GB drives of which i am
> > presently using 3gb per drive for the cache (3Gb * 4 drives) =12
> Gb
> > with 100 MB cache_mem
> >
> > maybe others hv something to say as well
> > rgds
> > khizcode
> >
> > --- Andre van Zyl <vanzyla@cedara.kzntl.gov.za> wrote:
> >
> >>Hi,
> >>
> >>Increasing your cache_mem from 100 MB to 128MB isn't going to buy
> you
> >>much.
> >>In fact, unless you're really pushing your box, you're not really
> >>even going
> >>to see a major boost from the 100MB as it is.
> >>
> >>As for your cache size, a general rule of thumb from Duane Wessels
> is
> >>to
> >>allow 32 MB of RAM for every 1 GB of disk space. So, using this
> rule,
> >>in
> >>order to run a 20 GB cache, you're looking at 640 MB of RAM to be
> >>safe, and
> >>512 MB RAM can run a cache of about 16 GB or so.
> >>
> >>HTH,
> >>
> >>AD.
>
> --
> Joe Cooper <joe@swelltech.com>
> Affordable Web Caching Proxy Appliances
> http://www.swelltech.com
>

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Received on Thu Oct 04 2001 - 05:24:58 MDT