On 25 Jun 2008, at 09:43, MB wrote: > Terence Cozad sa såhär: > >> The general, but unofficial, rule is to leave at least 10% of the >> HD free. >> Less than that and the system slows down. > > 10% helps yes, but for demanding apps that also need data swap space, > I'd say 20% free is a more useful norm. Swap space is normally only a Gig, you can see it under System Memory in Activity Monitor in 10.5.3. This is an absolute value that is unrelated to drive size, so giving it as a percent doesn't make sense. However, on some Unix systems 20% is the recommended free space. Once I get past 5 swap files, my system becomes more or less unusable. I try to run with a single swap file (the min.), because the system starts to slow down with multiple swap files and also can start make errors. Unfortunately, OS X isn't that good at reducing swap files when memory is freed up. So, I restart to clear the system out. dss David Stodolsky davidstodolsky at mac.com Skype: davidstodolsky