AWE Memory: Seeing approx. 1 Gig less than expected

I am runnning a dedicated SQL Server 2005 Standard edition server on Win 200
3,
with 16 GB RAM.
I have AWE enabled, with a Max Server Memory of 14336 (14 GB).
I have /3GB /PAE set in the boot.ini.
When I run SQLServer:Memory Manager, Target Memory (KB) in Perfmon, I only
see 13722592 KB (or 13400.96875 MB, 13.086 GB) being used out of the 14 GB
specified.
Is this normal, or am I being robbed of a Gig of memory somewhere?
Message posted via droptable.com
http://www.droptable.com/Uwe/Forum...server/200610/1If I recall correctly, AWE consumes about 1GB of memory as overhead.
Arnie Rowland, Ph.D.
Westwood Consulting, Inc
Most good judgment comes from experience.
Most experience comes from bad judgment.
- Anonymous
"cbrichards via droptable.com" <u3288@.uwe> wrote in message
news:67a8999d3983c@.uwe...
>I am runnning a dedicated SQL Server 2005 Standard edition server on Win
>2003,
> with 16 GB RAM.
> I have AWE enabled, with a Max Server Memory of 14336 (14 GB).
> I have /3GB /PAE set in the boot.ini.
> When I run SQLServer:Memory Manager, Target Memory (KB) in Perfmon, I only
> see 13722592 KB (or 13400.96875 MB, 13.086 GB) being used out of the 14 GB
> specified.
> Is this normal, or am I being robbed of a Gig of memory somewhere?
> --
> Message posted via droptable.com
> http://www.droptable.com/Uwe/Forum...server/200610/1
>|||Thanks Arnie. I do not dispute that, but it does make me scratch my head.
On another dedicated SQL Server, identical to the current one I am building,
except this other one has only 8 GB of RAM, when I set the Max Server Memory
to 6144 (6 GB), I see all 6144 in Target Memory. If SQL Server keeps 1 GB to
itself, then I would expect to only see 5 GB being used in Target Memory, bu
t
no, I am seeing all 6 GB on my 8 GB machine. Just makes me wonder...makes me
feel like I am being cheated out of approximately 1 GB on my 16 GB server,
since I have 14 GB specified in Max Server Memory and am only seeing 13 GB i
n
Target Memory.
Arnie Rowland wrote:[vbcol=seagreen]
>If I recall correctly, AWE consumes about 1GB of memory as overhead.
>
>[quoted text clipped - 9 lines]
Message posted via droptable.com
http://www.droptable.com/Uwe/Forum...server/200610/1|||I really don't recall if that 1GB overhead is in addition to the AWE
allocation, or if it is part of the AWE allocation. (I always thought that
it was outside of the AWE allocation.)
So, back to your situation.
Is it possible that there is some other usage on the box that is grabbing
memory from the OS before AWE can get it's share (thereby leaving only 13GB
for AWE)?
Another instance of SQL Server with /3GB switch?
Arnie Rowland, Ph.D.
Westwood Consulting, Inc
Most good judgment comes from experience.
Most experience comes from bad judgment.
- Anonymous
"cbrichards via droptable.com" <u3288@.uwe> wrote in message
news:67a9b4e454ccc@.uwe...
> Thanks Arnie. I do not dispute that, but it does make me scratch my head.
> On another dedicated SQL Server, identical to the current one I am
> building,
> except this other one has only 8 GB of RAM, when I set the Max Server
> Memory
> to 6144 (6 GB), I see all 6144 in Target Memory. If SQL Server keeps 1 GB
> to
> itself, then I would expect to only see 5 GB being used in Target Memory,
> but
> no, I am seeing all 6 GB on my 8 GB machine. Just makes me wonder...makes
> me
> feel like I am being cheated out of approximately 1 GB on my 16 GB server,
> since I have 14 GB specified in Max Server Memory and am only seeing 13 GB
> in
> Target Memory.
> Arnie Rowland wrote:
> --
> Message posted via droptable.com
> http://www.droptable.com/Uwe/Forum...server/200610/1
>|||I suspect that is the case (some other usage on the box is grabbing memory),
but it is not another instance. I am still investigating.
Arnie Rowland wrote:[vbcol=seagreen]
>I really don't recall if that 1GB overhead is in addition to the AWE
>allocation, or if it is part of the AWE allocation. (I always thought that
>it was outside of the AWE allocation.)
>So, back to your situation.
>Is it possible that there is some other usage on the box that is grabbing
>memory from the OS before AWE can get it's share (thereby leaving only 13GB
>for AWE)?
>Another instance of SQL Server with /3GB switch?
>
>[quoted text clipped - 20 lines]
Message posted via droptable.com
http://www.droptable.com/Uwe/Forum...server/200610/1