Re: [squid-users] Squid CPU 100% infinite loop

The kdump doesn't show any sign of infinite loop, but squid 100% CPU
(instead of normal CPU usage ~5-15%) and the denial of service caused
(squid is unavailable when it uses 100% CPU or very very slow), reminds
me of an infinite loop under a thread.
The kdump is done when squid hangs, then it seems all works fine, very
strange... Anyway kdump file grows in size in the time when this event
happened.

-- 
Best regards,
Loïc BLOT, 
UNIX systems, security and network expert
http://www.unix-experience.fr
Le mercredi 15 mai 2013 à 15:53 -0600, Alex Rousskov a écrit :
> On 05/15/2013 01:07 PM, Loïc BLOT wrote:
> 
> > Sorry, but it's an approximation, when there is only few users squid can
> > run for hours :)
> 
> I see. This information increases the number of suspects, but the
> recommended triaging methods remain the same (FWIW, kdump is not one of
> them).
> 
> 
> > Squid has got in an infinite loop. Here is a kdump extract of squid it
> > seems there is no special kernel call:
> 
> This kdump does not show a infinite loop -- things change as Squid reads
> and writes data. Was that kdump growing as Squid was inside the infinite
> loop? Or did it stop grow once Squid entered the loop?
> 
> 
> Thank you,
> 
> Alex.