Re: [squid-users] Very strange squid problem

jotacekm wrote:
> We have a proxy server running squid with a good number of clients connected.
>
> Sometimes clients just cant browse pages anymore (not all clients, but
> most). They can ping the proxy, ping to outside servers, resolve dns, and so
> does the proxy server.
> I checked CPU (5-10% usage), memory (not swapping), Disk, load, connections,
> firewall, everything is fine. No errors on systems logs and cache.log. Squid
> is up and running. Squid FD limit is 4096 but wasnt even near this limit
> (netstat -na | grep 3128 | wc -l returned around 400 and lsof -nPi | grep
> squid | wc -l returned around 30)
>
> So, on the proxy server, I try "telnet 127.0.0.1 3128".Sometimes it times
> out, sometimes it connects quickly, sometimes it takes like 5 seconds to
> connect. I tried a lot of times and this is what keeps happening, most of
> the time it does not connect. If i run squid -k reconfigure, telnet goes
> back to normal and people browsing goes back to normal.
>
> Has anyone here ever had a problem like this? Any ideas on what might be the
> cause?
>

Using any of these?

  Squid 2.6 or older
  ICAP
  diskd
  ident
  dnsserver helper
  large disk cache
  remote network SAN disk
  RAID

Logs would be the place to look. Specifically the cache.log, if there is
no indication at the usual log level you run bump debug_options ALL,2
or ALL,3 and see if anything shows up more than normal when the problem
is happening.

Amos

-- 
Please be using
   Current Stable Squid 2.7.STABLE6 or 3.0.STABLE16
   Current Beta Squid 3.1.0.9