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will a 32 bit SQL starve on 4GB memory?

Posted on 2010-08-13
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Last Modified: 2012-05-10
if a box has only 4 GB RAM, it really can't sustain any decent app, can it?

--Os and VAS take up 4 GB, and hence won't have any memory to spare for buffer pool. Is this understanding correct?

thanks
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Question by:anushahanna
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by:
Cboudroz earned 800 total points
ID: 33431955
If you see that the OS and VAS taking the full 4 gb RAM, don't think that you can run SQL server on that server, but if you have 1 gig free maybe you can try it for a Development server, but never for a production server.



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by:chapmandew
chapmandew earned 800 total points
ID: 33431957
Depends on what is going on w/ the server...the 2gb for the VAS includes buffer pool memory as well.
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by:anushahanna
ID: 33431963
>>If you see that the OS and VAS taking the full 4 gb RAM
what tool do you use for the above?
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by:anushahanna
ID: 33431972
>>the 2gb for the VAS includes buffer pool memory as well.

Which gets the priority first - VAS or buffer pool?

so technically, it can get starved if the box becomes busy, right? and can survive on light transaction load?
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Assisted Solution

by:Cboudroz
Cboudroz earned 800 total points
ID: 33431991
>>If you see that the OS and VAS taking the full 4 gb RAM
what tool do you use for the above?


You can have a quick Idea whit Windows Task Manager, or more info can be found whit the permon.exe
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Assisted Solution

by:chapmandew
chapmandew earned 800 total points
ID: 33431998
buffer pool is part of the VAS.

if it gets busy, it will page the pageable memory to the pagefile
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by:anushahanna
ID: 33432834
>>if it gets busy, it will page the pageable memory to the pagefile

and if AWE is enabled, then it will go to the AWE part (when VAS gets busy), and then if need be then to the pagefile, right?
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by:anushahanna
ID: 33432838
Thanks Cboudroz.
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Assisted Solution

by:Scott Pletcher
Scott Pletcher earned 400 total points
ID: 33434098
VAS is **always** 4G for 32-bit Windows.

VAS has nothing directly to do with physical memory.

That's why it's call "Virtual" :-) .
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by:anushahanna
ID: 33455209
Thank you.
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