noatime?

[Wojtek Puchar]

I'm using 2.1.2 with squid directory on separate 2GB drive and i have 2
questions:

1) Can i use mount -o atime for squid disk for speedup.

2) How can i tell squid to use ALL available space.
I currently have:
/dev/sda             2062465 2031298    31167     98%   /var/cache/www
And 
cache_dir /var/cache/www 2060 16 256

And i always have at least 15MB free (wasted?) space.