Re: [squid-users] High cpu load with squid

Witam,

Dnia pon, lis 01, 2010 at 01:17:46 +0000, Amos Jeffries napisał:

Thank you for reply.

> > redirect_program /usr/local/bin/redirector.pl
> > redirect_children 80
>
> Replace those with:
> url_write_program /usr/local/bin/redirector.pl
> url_rewrite_children 80
>
> >
> > store_avg_object_size 8 kB
> > minimum_object_size 1 KB
> > maximum_object_size 100 MB
> > maximum_object_size_in_memory 1 MB
> > cache_mem 1000 MB
> >
> > cache_swap_low 80%
> > cache_swap_high 100%
>
> cache_swap_high should be something less than 100% (99% may be better).
> Squid will ONLY begin the aggressive space clearing when cache_swap_high
> threshold is passed. So with 100% this may cause active connections to be
> stopped while 20% of the cache is discarded.

I try set cache_swap_high to 95%, and today squid again get a lot of
cpu.

>
> > # previous cache
> > #cache_dir ufs /var/spool/squid-cache/cache 30000 12 256
> > cache_dir aufs /var/spool/squid-cache/cache 30000 60 100
> >
> > dns_nameservers 192.168.1.100 192.168.1.200
> > ipcache_size 8192
> > fqdncache_size 1024
> > positive_dns_ttl 2 hours
> > negative_dns_ttl 1 minutes
> > ipcache_low 90
> > ipcache_high 95
> >
> > emulate_httpd_log on
> > access_log /var/log/squid/access.log
>
> Remove emulate... and change access_log to:
> access_log /var/log/squid/access.log common
>
> > cache_log /var/log/squid/cache.log
> > cache_store_log /dev/null
>
> Set this to "cache_store_log none".
>
> >
> >
> > Rest of squid.conf are acls. I have about 30 - 40 mbps of traffic. On
>
> You have "http_access allow sloneczko" at the top of this config. so its
> possible your other ACL are not working.
>
> > board
> > are core2duo 1.8 ghz 4 gb ram on intel chipset, 2x SATA on soft raid
> (for
> > cache - md0).
>
> by "soft raid" you mean *software* raid? That is a disk IO killer for
> Squid.

Yes, software raid.

>
> >
> > Any ideas? When I run -k debug I can't do anything - load has increased,
>
> > and nothing could be seen, thousands lines per second was write to
> > cache.log.
>
> During a time when things go slow what seems to be the most common
> thing(s) logged?
>

Nothing strange, fo example "Invalid request". I try set Your
suggestions, and write for fiev days.

-- 
Pozdrawiam
Michał Prokopiuk
michal[@]sloneczko.net
http://www.sloneczko.net
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