How to change the Max number of open windows

[yonatan]

Hi,

I use a program that opens hundreds of windows (about 700 to be precise...)
and when i try to open more that that there's a message saying something like: " not enough memory", and when i go to the TaskManager i see that it uses less than 1 gig of ram (out of 2).
when i had XP i went to the registry settings somewhere and changed a memory value, and it fixed the problem.
Now that i have win 7 i search for the new (exact) value i should be placing.

Here is a link to the solution Microsoft proposes for XP/Vista:
"Out of Memory" error message appears when you have a large number of programs running
(no solution there for windows 7 yet...)

Thanks!

 

[H2SO4]

The same procedure should work on Win7 too, but they haven't yet updated the article.

C:\>reg query "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\SubSystems" /v windows
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\SubSystems
windows REG_EXPAND_SZ %SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,20480,768 Windows=On Sub
SystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitialization,2
ServerDll=sxssrv,4 ProfileControl=Off MaxRequestThreads=16

Increase the bolded number. It'll be substantially smaller on 32-bit windows (the example is from the 64-bit box on which I'm typing this).

========================================
Just FYI, the size of those parameters has very little to do with the amount of RAM. Going back a looong way, parts of this code are from pre-NT versions of Windows. So-called GDI objects don't live in the "Object Manager" namespace, but instead in a separate area used for storing "GDI objects" (window elements, icons, buttons, cursors...).

When the visual complexity of the stuff you've got on screen reaches a level where the storage area is no longer sufficient to store all those windows, buttons, checkboxes..., you've run out of a resource called "desktop heap", and that's what the error message is really trying to tell you.

What sort of program is it, just out of idle curiosity?

 

[yonatan]

Thanks H2SO4,
Well, the original number on my system is 12288 (32-bit indeed), and when i increase that number
it doesn't make any difference (When i had XP i know that there was an exact number to put, i think it was 6144 or 8096 and any other number wouldn't make any difference)
Am i doing a mistake somewhere?

Anyway, I use a stock trading program called TradeStation, and i open a lot of charts to monitor the markets.

 

[arliedog]

desktop heap allocation failure

I still get a event logged with an ID of 243 and a description of desktop heap allocation failure.This is happening at boot up with only the desktop open, nothing on the taskbar ec. When I look at the settings in the registry they are the same as shown in the earlier post. Can a bad graphics driver effect the desktop heap?

 

[dave1812]

Thanks H2SO4,
Well, the original number on my system is 12288 (32-bit indeed), and when i increase that number
it doesn't make any difference (When i had XP i know that there was an exact number to put, i think it was 6144 or 8096 and any other number wouldn't make any difference)
Am i doing a mistake somewhere?

Anyway, I use a stock trading program called TradeStation, and i open a lot of charts to monitor the markets.

700 windows??? How big is your monitor and what's the resolution?? How can you keep track of that many windows? You must be a higher lifeform that a mere mortal like myself.

 

[LP59]

Did you find the solution?

I use the same program and have the same problem. Did you find the solution? I defaulted to buying enough machines to run 1200 windows for TradeStation but am moving to Spain. Would like to know if I can run everything off of my one "rocket ship" computer (8 processors).

Please let me know.

Thanks

Hi,

I use a program that opens hundreds of windows (about 700 to be precise...)
and when i try to open more that that there's a message saying something like: " not enough memory", and when i go to the TaskManager i see that it uses less than 1 gig of ram (out of 2).
when i had XP i went to the registry settings somewhere and changed a memory value, and it fixed the problem.
Now that i have win 7 i search for the new (exact) value i should be placing.

Here is a link to the solution Microsoft proposes for XP/Vista:
"Out of Memory" error message appears when you have a large number of programs running
(no solution there for windows 7 yet...)

Thanks!

 

[Zomby88]

:shock::shock::shock::shock::shock::shock::shock: