I might be wrong here, but I believe OS 9.1 has it's Virtual Memory
ON by default. I just reformatted and re-installed a system recently to serve as a workstation at work. The company is cutting back costs so the ideal "New G4 Workstation" might not happen for a long time.
So I took an older Beige G3/300 Mini-Tower that was essentially serving us as nothing more than a Trapping R.I.P. running "Trapeze" software, and swapped this with a pathetically
slow 9500/132 "I don't wanna work on that system" workstation we had. The trapping software we run barely works as-is and we try to trap manually if we can, so this much faster G3/300 was essentially being "wasted" on it.
I've noted since then that while we tend to keep VM off, and I usually have always done this on my home system, that all the systems I've upped to OS 9.1 have thiers ON as the default. This is something I've usually checked out in the past whenever I've upgraded a system, but overlooked this time. Plus I believe that when I upped to OS 9.0.4 in the past it maintained whatever setting(s) were already made by the user.
As far as I know Photoshop and Virtual Memory had never "played" too well together. Apparrently Photoshop has it's own means of Virtual Memory Management that has caused problems with those that had attempted to use Photoshop with thier systems VM on. This may not be your situation, especially since your'e up to Photoshop 6, but it's worth checking-out. One thing I'm noticing is that OS 9.1 actually seems to run
better and at a lower RAM consumption with VM on. This is practically a
first for the MacOS that I know of.
With VM off I've seen OS 9.1
skyrocket on RAM useage, especially as more and more applications are in-use. Over-all 9.1 seems to run
better with VM on, and it seems that many issues in the past with VM may have been resolved.
I can't honestly say that I have noticed any major problems with the OS 9.1 upgrade/update. And this also includes the fact that VM has been
ON on many of the systems I deal with at work since upgrading them. Even in Photoshop I've seen no problems yet, but wer'e not quite up-to-date with Photoshop yet.
My place of work is a pre-press graphics firm and running stuff like QuarkXPress 3.3 & 4.11, Illustrator 8 & 9, Photoshop 4 & 5, Suitcase 3 (which actually does still work under OS 9.X), PageMaker 6.5 and InDesign 1.5. The only thing here is wer'e using QuarkXPress about 90% of the time and most of what we do is strictly layout and typography. Wer'e not too intensive on the Illustrator or Photoshop work as most of our image files are supplied by our clients designers.
Mike
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