Performance tweaks

[Terry <terry@xxxxxxxxxxxxxxxx>]

Next week i need to set-up a squid server for a small company of about 
18 users.
I have set-up a test system at home on a machine of similar spec ( 2ghz 
512 ram and an ide disk )
I have the default config file with about half a dozen acl's.
At times browsing is really fast but now and again for no apparent 
reason it gets sluggish. Is there any config tweaks i can apply that may 
help?

Terry.