Re: [squid-users] Throughput slower, when data is in cache instead geting it from the webserver

On Mon, 24 Jul 2006, Dieter Bloms wrote:

> Hi,
>
> we use squid as shipped with SuSE Linux Enterprise 9
> (squid-2.5.STABLE5-42.41).
>
> The throughput is slower, when I get the data from cache and is faster,
> when I use the -r option to get the data from the webserver.
>
> --snip--
>
> This is my squid.conf
>
> --snip--
> cache_dir diskd /var/cache/squid 15360 16 256
> --snip--
>
> I'm alone on this server, which has 2G Ram and 2 Xeon 3.4 GHz CPUs.
> The cache_dir is a hardware raid1 with 36 GByte Space.
>
> Does anybody have an idea why the throughput is lower, when I get the
> data from cache instead from the webserver ?

I had a similar problem under Linux where cache hits were really slow on a
server that was not busy. Switching to aufs fixed the problem for me (ie
just replace the word "diskd" with "aufs" on the cache_dir line).

I know the FAQ suggests that diskd gives better performance (or it did the
last time I checked). I think that the FAQ may need updating to advise
that diskd or aufs may give the best performance depending on the load and
OS.

Steven
Received on Mon Jul 24 2006 - 08:26:25 MDT