[isp-caching] Re: unusually high cpu load with squid

[Timur Irmatov <thor@...>]

My squid is 2.4.6-2, installed from Debian package.  CPU usage is not
related to number of objects in cache, I tried to start squid with
empty cache, it still eats about 70% of CPU with 2Mbit/s of
traffic. My cache size is 10Gigs, but I tried 2, 4, 8Gb, same
result. There are no unusual errors in squid log files...

I tried to compile squid from sources, problem persists.

On Fri, Mar 19, 2004 at 11:10:26PM +0500, Masood Ahmad Shah wrote:
> ohh my dear there is nothing to wrong with squid we people are using since
> last 5 years @ FreeBSD, Solaris, Linux.
> There can be couple of  reason via your cpu can reach to top.
> you have too many objects in your cache, when u reboot or restart cache
> it's trying to load object.
> your cache size?
> have u checked log files, cache dir size etccc.
> 
> which squid version you are using?
> 
> >
> > I'm running squid pool on ext3 filesystem, but this does not seem to
> > be the cause of the problem.  I tried ext2 with same result.  I have
> > even tried to install FreeBSD 4.9 on this machine.  No luck.  Squid
> > consumes a lot of cpu on both systems - Linux & BSD.
> >
> > > On Tue, Mar 16, 2004 at 11:55:49PM +0500, Masood Ahmad Shah wrote:
> > > > have u checked ur system via
> > > >
> > > > vmstat
> > > > ps auwx
> > > > top
> > > >
> > > > regarding which process taking too much load. u did not show us ur
> complete
> > > > conf for squid. let us know
> > > >
> > > > cache_mem
> > > > cache_dir
> > > >
> > > > which file system you using?
> > > > you system load up due to squid or attacks ?
> > > >
> > >
> > > Look:
> > > vmstat 1
> > >    procs                      memory    swap          io     system
> cpu
> > >  r  b  w   swpd   free   buff  cache  si  so    bi    bo   in    cs  us
> sy  id
> > >  1  0  0  31204  13272 160936 238068   0   0    37    67   25    60   9
> 28  64
> > >  2  0  0  31204  13128 160944 238204   0   0    76     0 1280    93  12
> 32  55
> > >  1  0  0  31204  12920 160952 238404   0   0    68     0 1241    96  17
> 29  54
> > >  1  0  0  31204  12740 160952 238556   0   0    40     0 1149   102   9
> 35  56
> > >
> > > ps auxw
> > > USER       PID %CPU %MEM   VSZ  RSS TTY      STAT START   TIME COMMAND
> > > proxy      229 69.7 42.9 453660 444484 ?     D    Mar15 1984:02
> (squid) -D -sYC
> > >
> > > cache_mem 256 MB
> > > cache_dir ufs /var/spool/squid 10240 16 256
> > >
> > > Top also show that the only process that eats cpu is squid - 80% of
> > > cpu with traffic abount 2.5Mbit/s and 60 requests/sec.
> > >
> > > Sincerely yours,
> > > Timur Irmatov.
> >






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