Re: Squid Proxy server trouble: newsgroups & email OK, but no browsing

From: BearItAll (spam_at_rassler.co.uk)
Date: 10/20/04 

Date: Wed, 20 Oct 2004 11:07:33 +0100

Phisherman wrote:

> I have a Linux Squid proxy with Jays firewall to handle email,
> newsgroups and browsing for Windows machines. Today the browsing
> suddenly stopped, with both IE and Firefox. So, I decided to reboot
> the Linux machine and load Squid. Still no surf. After three times
> restarting Squid, now everything works. Any ideas what happened?
> What logs should I study? TIA

Squid is a hungry beast. If heavily used it can get stuck. If you use
squidGuard too then the effect of overload tends to be to block everything.

Check the squid cache size and how close to full it is, that in itself isn't
a problem because after a time any amount of space given to squid will
appear to be at the limit, but if you see in the logs that the hit rate for
cached pages is low, then quid has to work hard shuffling the cache finding
the least used and replacing it with the new hit.

Don't assume that larger cache is better, if your computer is low on memory
or CPU speed, then go for a relatively low cache size. So that cache
searches are faster tieing up less processor time.

Your problem could also be to do with number of allowed squid threads. Which
is still linked to your system capabilities. This is indicated very clearly
in the logs. 

-- 
BearItAll
Martian currently living on planet ZoggleBoggle
Someone kept throwing bits of metal at us, When
I find out who I'll have words with them.

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