Squid – optimizing cache hits
The first place to look for increasing your hit ratio is the refresh_pattern parameter within the squid.conf file.
Note: the following applies to squid 3.0 and higher only….
I have found a really good page here http://linux.com/archive/feature/153221 that explains some good setups if you with to increase your cache hits…
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern -i \.(gif|png|jpg|jpeg|ico)$ 10080 90% 43200 override-expire ignore-no-cache ignore-no-store ignore-private
refresh_pattern -i \.(iso|avi|wav|mp3|mp4|mpeg|swf|flv|x-flv)$ 43200 90% 432000 override-expire ignore-no-cache ignore-no-store ignore-private
refresh_pattern -i \.(deb|rpm|exe|zip|tar|tgz|ram|rar|bin|ppt|doc|tiff)$ 10080 90% 43200 override-expire ignore-no-cache ignore-no-store ignore-private
refresh_pattern -i \.index.(html|htm)$ 0 40% 10080
refresh_pattern -i \.(html|htm|css|js)$ 1440 40% 40320
refresh_pattern . 0 40% 40320
This is an example of a site that you may wish to heavily cache…
refresh_pattern -i youtube.com/.* 10080 90% 43200
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