cache_mem size exceeded (by a lot!)

Hi all,

Occasionally, but not occasionally enough (perhaps once a week) I get the
following in my cache.log.

1999/05/19 05:58:21| WARNING: Exceeded 'cache_mem' size (548756K > 51200K)
1999/05/19 05:58:21| Perhaps you should increase cache_mem?
1999/05/19 05:58:21| storeGetMemSpace stats:
1999/05/19 05:58:21| 1 objects locked in memory
1999/05/19 05:58:21| 0 LRU candidates
1999/05/19 05:58:21| 0 were purged
1999/05/19 05:58:21| 0 were released

That's around 520M - I don't think it'd be wise to increase cache_mem to
that much!

This has the effect of filling up the swap partition and pretty much
bringing the system to a halt. We have 896M of memory, but only 500M swap,
but I figured it shouldn't be swapping much anyway. What could be taking
up all this memory? There certainly isn't a 500 odd meg file being
downloaded!

We're running squid v1.1.22, using dlmalloc, on Digital Unix 4.0B, and
around 14gig for caching.

Any help would be much appreciated.

Regards,

Andrew

-- 
        Andrew Moar : Ph +61 3 9479 1505  email A.Moar@latrobe.edu.au
         Unix Environment Specialist, Information Technology Services
                    La Trobe University, Melbourne