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From Brian Akins <>
Subject Re: mod_cache performance
Date Tue, 03 Aug 2004 12:11:24 GMT
Justin Erenkrantz wrote:

> squid was really inefficient both CPU and network-wise.
Under load, squid will always use 100% of the CPU.  This is because it 
uses poll/select.

> The squid numbers *completely* baffle me.  I have to believe I've got 
> something stupid configured in squid (or I did something stupid with 
> flood; but the network traces and truss output convince me 
> otherwise).  My squid is using the default RHEL3 installation (Squid 
> Cache: Version 2.5.STABLE3).
RHEL 3 sucks.  Fedora Core 2 would have been a much better choice.  
Also, did you use poll?  I know a large website that does several dozen 
hits per day using squid :)

On an OS that supports sendfile, a disk based cache will almost always 
bury a memory based one.

Brian Akins
Senior Systems Engineer
CNN Internet Technologies

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