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How will multiple instances of PAE application run on Windows Server 2003 EE

I have an application that supports PAE via the /largeaddressaware switch. A client would like to run multiple instances of the application on a Windows Server 2003 Enterprise Edition box.
 
If three instances of the application are running on a PAE enabled system with 16GB of ram, will they use all the memory that is available to them. Will adding the 3GB switch make any difference?
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servantis
Asked:
servantis
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1 Solution
 
Netman66Commented:
No.

Your apps that are LAA (Large Address Aware) should have a limiting switch to use also.

What application is it you are attempting to run like this?

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servantisAuthor Commented:
It's a the server for an OLAP tool. I'm not too familiar with it, so I don't know much more than that. Assuming that the limiting switch is not enabled will each instance use as much memory as is available?
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Netman66Commented:
Yes.  You may find that the first instance steals as much as it wants and leaves little for the other instances.  There should be a switch that limits each instance of the exe to a fixed memory allocation.  

Do you have the name of this app?

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servantisAuthor Commented:
The app is actually still in development. Thanks for the help.

Will look into the limiting switch as each instance will need at least 2gb.
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Netman66Commented:
Great.  You should be able to create your own switch something like /MAXMEM= to tell your app that the limit is predefined.

You might also want to consider a processor affinity switch as well.  If you allow a 2GB environment space it is also probable that you might require a ceiling on processor utilization or you could end up pegging the CPU with a single app.

Good luck with this - I hope it's doable.
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