troubleshooting Question

How do I increase the desktop heap size on Windows 2008\Vista to more than 64MB?

Avatar of dpavlic
dpavlic asked on
Microsoft Legacy OSMicrosoft Server OSWindows Server 2008
4 Comments1 Solution4670 ViewsLast Modified:

I tried to increase my desktop heap size on Windows 2008 and Vista, but the maximum value I can get is 64MB. I cannot find this restriction to be documented anywhere, so is this the maximum value?

I increased the SharedSection of the Registry value from the default value (20MB for Win2008, 12MB for Vista) to 150MB. - HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\SubSystems\Windows.

However, when I run the testlimit utlility ( which uses up the desktop heap, it used only 64MB.

And according to , the desktop heap size is no longer limited by the SessionViewSize  on 2008 and Vista, so is 64MB the maximum size of a single desktop heap?

Thank you,
Daniel Pavlic

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Join our community to see this answer!
Unlock 1 Answer and 4 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 4 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros