RE: [squid-users] Fine Tuning - Suggestions If you would..

I would suggest you analyze the cache.log to see which objects are
responsible for miss, size of object, TTL of the object, do you have
many objects with query string. If so, should they be cached? Do you
want to cache object which does not have TTL? (currently your squid.conf
does not cache this type of object). It is better to start with
understanding your traffic, user behavior and what you can compromise in
term of object's freshness to gain saving. The higher hit rate and
longer the object stays in cache, the better of saving.

Regards,
Khanh

-----Original Message-----
From: Errol Neal [mailto:eneal@dfi-intl.com]
Sent: Wednesday, October 18, 2006 12:28 PM
To: squid-users@squid-cache.org
Subject: [squid-users] Fine Tuning - Suggestions If you would..

As an experiment, I implemented SQUID 2.6 on my network to see if we
could reduce our bandwidth utilization. I ran it for about a week in
production and after getting through my other work, I was finally able
to analyze my access logs using squeezer2 and see how we fared.
According to the report that reviewed, my Hit Cache was about 31% and we
managed to save about 9% on our bandwidth utilization. Frankly, I was
hoping for squid to make a bigger impact than that, but I am aware that
this is probably going to take some more tuning. My question is how do I
go about doing that?
I'd like to increase see a much bigger hit cache ratio and a larger
bandwidth savings. Also, should I consider running squid for a longer
period of time before performing any kind of analysis?
I'm posting my squid.conf file. Any advice, chastisement, rebuke, etc
would be appreciated.

TIA,

Errol Neal

###
acl QUERY urlpath_regex cgi-bin \?
                 no_cache deny QUERY
cache_mem 128 MB
refresh_pattern . 0 20% 4320
refresh_pattern -i jpg$ 0 50% 8640
refresh_pattern -i png$ 0 50% 8640
refresh_pattern -i gif$ 0 50% 8640
refresh_pattern -i swf$ 0 50% 8640
refresh_pattern -i js$ 0 50% 8640
refresh_pattern -i css$ 0 50% 8640
refresh_pattern -i pdf$ 0 50% 8640
refresh_pattern -i flv$ 0 50% 8640
refresh_pattern -i avi$ 0 50% 8640
cache_replacement_policy heap LFUDA
memory_replacement_policy heap LFUDA
maximum_object_size 150096 KB
minimum_object_size 0 KB
fqdncache_size 4096
ipcache_size 4096
logfile_rotate 0
access_log /usr/local/squid-2.6/var/logs/access.log
cache_log /usr/local/squid-2.6/var/logs/cache.log
cache_store_log /usr/local/squid-2.6/var/logs/cache_store.log
half_closed_clients off
cache_swap_high 95
cache_swap_low 90
cache_dir aufs /var/squid/cache1 228828 25 256
cache_dir aufs /var/squid/cache2 228828 25 256
buffered_logs on
http_port 3128 transparent
acl localnet src 172.16.100.0/255.255.252.0
acl localhost src 127.0.0.1/255.255.255.255
acl CONNECT method CONNECT
acl all src 0.0.0.0/0.0.0.0
http_access allow localnet
http_access allow localhost
http_access deny all
###

__________________________________________
Errol Uriel Neal Jr.
Sr. Network Administrator
DFI International, Inc.
1717 Pennsylvania Ave NW, Suite 1300
Washington, DC 20006
Tel (202)452-6955
Fax (202)452-6910
eneal@dfi-intl.com
www.dfi-intl.com
Received on Wed Oct 18 2006 - 11:15:50 MDT