Session Manager Questions/Why does SharedSection have 4 parameters?

[Rick]

This one is probably for a MVP, MSFT or anyone else familiar with
Win2K's desktop heap.

I'm getting "out of memory" errors while doing certain functions in
Adobe Photoshop 7.01 (specifically, working with 1-bit/B&W
graphics), although I have plenty of free RAM and pagefile remaining.
So I suspect a leak exists in PS. I'd like to allocate more heap to see
if it will work around the issue.

When poking through the registry I discovered the SharedSection
of this key...:

HKLM\System\CurrentControlSet\Control\Session Manager\
SubSystems\Windows

....has four parameters: 1024,3072,512,512

I was able to locate the purpose of the first three parameters in
MS's tech database:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;184802
http://support.microsoft.com/default.aspx?scid=kb;en-us;126962
but I can't find any notes related to the 4th parameter. Does anyone
know its purpose?

Also, I've read that removing the Optional, Os2 & Posix keys in
Session Manager\SubSystems will free up memory/resources
(I'm not using any of them). Is this correct?

Thanks,
Rick

 

[Unregistered]

I'm pretty sure deleting those keys will free up pool and heap. It wil
also make your machine more secure. Supposedly, the fourth value i
for Terminal Services

Unregistered