Re: [squid-users] cache storage problem? (squid 3)

I hope you noticed that squid3 is still in development...

> >On 23.05.06 12:08, Dan Thomson wrote:
> >> Whenever I run squid, it seems to run fine until the cache memory
> >> becomes full. Once this happens, squid slows down to the point of
> >> becoming unusable.

> On 5/24/06, Matus UHLAR - fantomas <uhlar@fantomas.sk> wrote:
> >you probably have cache_mem or cache_dir sizes too big.
> >check out SQUID FAQ, especially the memory part:
> >http://www.squid-cache.org/Doc/FAQ/FAQ-8.html
> >and disk cache size recommendation:
> >http://www.squid-cache.org/Doc/FAQ/FAQ-4.html#ss4.14

On 24.05.06 15:04, Dan Thomson wrote:
> cache_mem 1 GB

> The system also has 3 gig of RAM.

Note that cache_memory is only used for newly fetched objects, not for those
fetched from cache. I'd say this is kind of waste.

> Each cache dir is a partition on a SCSI drive (each on separate
> drives). The partitions are 60 gig.

> cache_dir diskd /var/spool/squid/1 2000 128 256
> cache_dir diskd /var/spool/squid/2 2000 128 256

It's a pretty waste of space, I'd say. for 60GB drives, I'd use size 40000
also, 128 L1 dirs is too much for 2GB cache_dirs, I have 64 on 30GB
cache_dirs (but this should not cause any problem)

> It also seems as though the network traffic decreases greatly whenever
> objects are written to disk cache.

this may be an IRQ conflict, or bad drivers for SCSI/net card.

> >> I decided to check the storage manager logs to see what was going on
> >> when the memory becomes full, and I see a lot of "no valid swapdirs
> >> for this object" error messages.

what sizes are those objects of?

> >> The occurrence of these error messages correlate with a large jump in
> >> CPU usage by squid. Is there a known reason for this?

May be caused by the fact squid searches for valid cache_dir

-- 
Matus UHLAR - fantomas, uhlar@fantomas.sk ; http://www.fantomas.sk/
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