I'd like to add to this. How do you go about measuring requests/sec?
Manually, with the access.log timestamps, or is there a squid utility to do
this? What's the typical upper limit for ufs, aufs, etc?

Paul

> May I ask you some more about using disk in squid ?
>
> Now, with about 160 req/s and my cache_dir is 15 GB. With addition disk

(36
> GB), do I just add a maximum partition to the squid (the whole disk) ?

With
> so much webpages that generated automatically nowadays (I mean the content
> of the webpages change rapidly), do I need to have a large cache_dir ?

With
> my new 36 GB disk, what is the best capacity of the new cache_dir ?