Re: [squid-users] squid cpu usage ..high??

50% is probably about right for a 550MHz machine at 40 recs/sec.

How many drives did you say you had? 35 threads is probably a bit much
for one drive. Actually, the default is great for all but the fastest
drives--so don't alter the default when configuring.

LFUDA and GDSF are documented by the folks who implemented them:

http://www.hpl.hp.com/techreports/1999/HPL-1999-69.html
http://fog.hpl.external.hp.com/techreports/98/HPL-98-173.html

These links are taken from the squid.conf file. Note that replacement
policies are mostly academic--performance differences are very modest,
as are hit ratio differences. The benchmarks presented in the papers
are not realistic enough to really model the world--and I've found
Polygraph benchmarks shrink the performance + hit rate differences
between policies to almost nil, assuming a properly configured system
(i.e. enough RAM for the size of the cache, and enough disk space to
effectivly cache for the given workload).

khiz code wrote:

> hi joe
>
> well a guru is a guru and no doubting that
> well yes joe i did compile squid with the enable time hack option
> ive now compiled a new one without it
> now my figures are like this
> client_http.requests = 31.505258/sec
> client_http.hits = 14.794440/sec
> cpu_usage = 49.813500%
> i just hv a feeling that even this is abit on the higher side
> ive compiled 2.4S1 with async-io and ummm 35 threads....
> do u think that this is abit high given the load of abt 40 req/sec ..
> do i need to decrease the no of threads or totally give up async io ..
>
> also i ve not been able to get sufficient information abt the LFUDA and
> GFUDA replacment plocies and related performance..any pointers to that
> ??
> rgds
> khizcode
>
>
>
> --- Joe Cooper <joe@swelltech.com> wrote:
>
>>Am I misremembering that the configure options you posted a week or
>>two
>>back included 'time-hack'? If you are still running a Squid with
>>time-hack, recompile without it--it is a hack that does not work as
>>expected on any platform I know of and leads to severe CPU overusage.

                                   --
                      Joe Cooper <joe@swelltech.com>
                  Affordable Web Caching Proxy Appliances
                         http://www.swelltech.com
Received on Fri Sep 14 2001 - 00:28:19 MDT