From owner-freebsd-isp  Tue Jul  2  7: 0:57 2002
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From: Alexander Maret <maret@atrada.net>
To: "'Anton V. Petrov'" <apetrov@smrtlc.ru>
Cc: "'isp@freebsd.org'" <isp@freebsd.org>
Subject: AW: squid under freebsd4.0 eats almost 100% of CPU
Date: Tue, 2 Jul 2002 16:00:42 +0200 
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> -----Ursprungliche Nachricht-----
> Von: Anton V. Petrov [mailto:apetrov@smrtlc.ru]
> Gesendet: Dienstag, 2. Juli 2002 08:15
> An: isp@FreeBSD.ORG
> Betreff: squid under freebsd4.0 eats almost 100% of CPU
> 
> 
> Dear readers,
> 
> I'm using squid under FreeBSD 4.0-RELEASE and it permanently 
> eats almost
> 100% of CPU resourses (99.50-99.99%). Luckily, this machine 
> has 2 CPUs :)
> First it was squid-2.3stable3, but now I have upgraded it to 
> 2.4stable6.
> The result shown by top, is the same :((


Upgrading to 4.6 will probably not help as I don't think that
the default values for SYSV message buffers have been increased.

Had exactly the same problem with 4.5. Squid eats all of your 
system resources because of your message buffers being too small.

Adding the following kernel configuration lines solved the
problem for me:

# SQUID - do not touch!
options         SYSVSHM
options         SYSVMSG
options         SYSVSEM

options         MSGMNB=16384
options         MSGMNI=41
options         MSGSEG=2049
options         MSGSSZ=64
options         MSGTQL=512
options         SHMSEG=16
options         SHMMNI=32
options         SHMMAX=2097152
options         SHMALL=4096
options         MAXDSIZ=536870912
options         DFLDSIZ=134217728
options         NMBCLUSTERS=10240
# SQUID END

For completeness I've posted my full squid kernel conf, though
you probably don't need the network things. SYSV messaging and
semaphores are the important values.


Good Luck,
Alex

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