Re: [squid-users] High CPU Utilization

Ross Kovelman wrote:
>> From: Amos Jeffries <squid3_at_treenet.co.nz>
>> Date: Mon, 19 Oct 2009 18:14:33 +1300
>> Cc: "squid-users_at_squid-cache.org" <squid-users_at_squid-cache.org>
>> Subject: Re: [squid-users] High CPU Utilization
>>
>> Ross Kovelman wrote:
>>> Any reason why I would have high CPU utilization, avg around 90%? I did
>>> build it for PPC although I do have a large dstdomain list which contains
>>> URL's that are not allowed on the network. It is a Mac G4 dual 1.33. This
>>> is with no load, or I should say no users on the network.
>>>
>>> Thanks
>>>
>> Could be a few things:
>>
>> * bug 2541 (except latest 3.0 and 3.1 releases)
>>
>> * lots of regex patterns
>>
>> * garbage collection of the various caches
>>
>> * UFS storage system catching up after a period of load
>>
>> * memory swapping
>>
>> * RAID
>>
>> * ... any combination of the above.
>>
>> If you have the strace tool available you can look inside Squid and see.
>> Or a use "squid -k debug" to toggle full debug on/off for a short
>> period and troll the cache.log afterwards.

> Amos,
>
> I am not using a raid, although my single drive performance might be slow?
> Will need to check on the i/o. When I do run squid or make any changes to
> the config I do get a lot of :
>
> 2009/10/16 14:44:08| WARNING: You should probably remove 'xxx.com' from the
> ACL named 'bad_url'
> 2009/10/16 14:44:08| WARNING: 'xxx.com' is a subdomain of 'xxx.com'
> 2009/10/16 14:44:08| WARNING: because of this 'xxx.com' is ignored to keep
> splay tree searching predictable
> 2009/10/16 14:44:08| WARNING: You should probably remove 'xxx.com' from the
> ACL named 'bad_url'
>
> Would this by chance do it? There is about 22,000 sites in the bad_url
> file.

I don't think so. Those warnings are produced by Squid as it prunes them
out of the ACL by itself.

You can get rid of the duplicates and sub-domains manually to reduce the
warnings.

Amos

-- 
Please be using
   Current Stable Squid 2.7.STABLE7 or 3.0.STABLE19
   Current Beta Squid 3.1.0.14