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Re: High cpu load with squid

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Witam,

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

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
MichaÅ Prokopiuk
michal[@]sloneczko.net
http://www.sloneczko.net


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