On Thu, Mar 10, 2005 at 07:44:27PM +0000, Stephen Mollett wrote: > On Thursday 10 Mar 2005 17:02, Todd Walton wrote: > > adding extra RAM would help avoid the badly named "Virtual Memory > > Minimum Too Low" message. With more physical memory, Windows should > > require a *smaller* swap space. It only creates more swap space when > > it runs out of physical memory and the swap space it has. In fact, > > that's what the message means. > > Unfortunately, because of the absurd way in which the Windows VMM allocates > memory, the more physical RAM you have, the more swap you must add. (About > 1.5x physical RAM is a typical value for the minimum pagefile size.) Having > less swap than physical memory is very bad because Windows wants to allocate > a page of swap for every page of physical memory which gets allocated. If > you've got 2048MB RAM and 128MB swap, it'll start complaining bitterly as > soon as your memory usage exceeds 128MB.
Actually Linux does this too. IIRC the recommended setting is 2x RAM for swap on linux. :) > > I discovered this the hard way back in early 1998 when I built a hefty > dual-Pentium II "extreme PC" with the then-almost-unheard-of amount of 256MB > RAM, running Windows NT 4. I thought that I wouldn't need swap at all most of > the time, so I set the minimum pagefile size to 2MB (the lowest value > allowed). Logging on and correcting it to 384MB was quite difficult. > > The Linux system I now use has 1024MB RAM and a token 256MB swap to allow for > emergencies and so that totally idle stuff can be paged out so it doesn't hog > RAM unnecessarily. In the rare event that available memory drops below 128MB, > a script automatically adds file-backed swap 256MB at a time to ease the > pressure. Swapfiles are removed when they are no longer needed. > > Stephen -- Matthew J Toseland - [EMAIL PROTECTED] Freenet Project Official Codemonkey - http://freenetproject.org/ ICTHUS - Nothing is impossible. Our Boss says so.
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