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| Increase MQS server processes on Win 2K server? |
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| scottfraser400 |
 Posted: Tue Aug 10, 2004 1:46 am Post subject: Increase MQS server processes on Win 2K server? |
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Newbie
Joined: 10 Aug 2004
Posts: 1
Location: London, England
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Hi
Can anyone give me guidance or point me to a previous post on how to increase the processes allowed by MQ Series Server on Win 2K server?
I have a user who is trying to start a 12th Manager on his DEV Server but is not allowed to. The memory and CPU resources within the machine are fine. So it would appear that there is a OS limit set on the MQ service.
I did a search within this site and found a post that said this could be done, but I couldnt find any further details.
Thanks
Scott |
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| bower5932 |
| Posted: Tue Aug 10, 2004 5:44 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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| What do you mean by 'not allowed to'? Are you getting a specific error? If so, what is it? |
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| JasonE |
| Posted: Thu Aug 26, 2004 7:35 am Post subject: |
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Grand Master
Joined: 03 Nov 2003
Posts: 1220
Location: Hursley
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The issue is you run out of desktop heap for a DCOM process launched from a service... From an internal article:
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The Knowledge Base article Q184802 has a lot of detail for this problem. One of the causes as documented in this article indicates that the ERROR_WAIT_NO_CHILDREN error results because the system has run out of desktop heap.
This is what the article says regarding the system having run out of desktop heap....
Every desktop object on the system has a desktop heap associated with it. The desktop object uses the heap to store menus, hooks, strings, and windows. The system allocates desktop heap from a system-wide 48-MB buffer. In addition to desktop heaps, printer, and font drivers also use this buffer.
Desktops are associated with window stations. A window station can contain zero or more desktops. The size of the desktop heap allocated for a desktop associated with a window station can be changed in the following registry value: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\SubSystems\Windows
The default data for this registry value will look something like the following (all on one line):
%SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,3072,512 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitialization,2 ProfileControl=Off MaxRequestThreads=16
Cutting to the chase, there are 3 value for the 'SharedSection'. As can be see above, these are 1024,3072,512 (Sometimes the last value may not be present (512)). This last value represents the size of the desktop heap for each desktop that is associated with a "noninteractive" window station.
MUSR_MQADMIN is usually the user id configured under dcomcnfg to run the IBM MQSeries Services as "noninteractive". The user should be able to modify this value to successfully launch all of their queue managers. A value of perhaps 768 or 1024 may be appropriate. Please note: The machine requires a restart for the new parameter to take effect.
Please read the article in full for additional information.
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