[squid-users] High CPU-Usage with squid 3.4.9 (and/or 3.4.4)

[Amos Jeffries]

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On 7/11/2014 2:50 a.m., Tom Tom wrote:
> Hi
> 
> After migration from squid 3.3.13 to 3.4.4, I recognized a 
> performance-issue. Squid is configured with 4 workers. They often
> have a CPU-Utilization between 50%-90% (each worker). With squid
> 3.3.13 (same configuration), the CPU-Utilization was never a
> problem. I installed squid 3.4.9 and had the same issue. No
> warnings/errors in the cache.log
> 
> I saw, that someone other reported a similar issue: 
> http://www.squid-cache.org/mail-archive/squid-users/201407/0500.html
>
>  Concerning the post above: Yes, we have external_auth-helpers 
> (ext_kerberos_ldap_group_acl) and no, we do not use delay_pools.
> The high cpu-usage comes not from the auth-helper - it comes from
> the 4 squid-worker-processes. Any hints? Is this a known problem?
> Probably solved in 3.5?

Are you able to find out any specific details about what the workers
are doing that uses so much extra CPU?

Amos

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