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To: BelowTheCrowd who wrote (54650)4/27/1998 11:32:00 PM
From: rudedog  Read Replies (1) of 186894
 
Maybe a little OT*OT...
NT is a virtual memory OS, Win95 is not. Win95 swaps out whole process contexts if it needs memory. We have done extensive testing showing not much benefit to more than 64MB on Win95 - it's hard to get enough happening to use more than that, the OS will usually hang up from some other problem before bottlenecking on memory.

NT on the other hand always operates out of virtual memory. It can take a 4K chunk from anything in 'real' memory and does so in background all the time if the free memory drops below a preset level, the default is 4MB. This is not really swapping but is page faulting, the fewer page faults the better for performance. It is very easy on NT to monitor the page fault rate and see if you need more RAM.
So large complex applications with large data contexts will just run better and better with more memory, since the memory manager will be above the threshold and will not 'clean up' least recently used pages of real memory. With the kind of things I do (building and debugging applications) the page fault rate can start to run up with 128MB, I use 256 MB and that keeps the rate pretty low. BTW all this on a CPQ 6000 professional workstation with 2 way 200MHZ PPRO which I like pretty well.
You are 100% on the impact of disk, but don't ignore the controller. A fast SCSI with a good controller is the key to great performance IMO.
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