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Thread Multicore Processor with DBISAM 4.22
Tue, Nov 18 2008 6:17 AMPermanent Link

David Gurevitz
I Have a performance problem with DBISAM with Windows 2000 Server in a Quad.Core Xeon Intel Dell Server (2.4mhz).
This server only runs DBISAM 4.22 Enginee Build 4. There are about 100 conections active in general. Sometimes, when there are many big
queries running on, I see that it's using only 2 processors of the 4 (the first and the third ones). Then the performance of the server is bad!

In a dual core Xeon server it uses mostly one processor only.

Is there a way to fix it?

Thanks

David
Tue, Nov 18 2008 6:56 AMPermanent Link

"Eduardo [HPro]"
David

>I Have a performance problem with DBISAM with Windows 2000 Server in a
>Quad.Core Xeon Intel Dell Server (2.4mhz).
> This server only runs DBISAM 4.22 Enginee Build 4. There are about 100
> conections active in general. Sometimes, when there are many big
> queries running on, I see that it's using only 2 processors of the 4 (the
> first and the third ones). Then the performance of the server is bad!
>
> In a dual core Xeon server it uses mostly one processor only.
>
> Is there a way to fix it?

This behavior is controlled by Windows and DBISAM does not have anything to
do with this. It (the DBISAM server) only creates new threads that are
controlled by the OS.

Eduardo

Tue, Nov 18 2008 10:36 AMPermanent Link

David Gurevitz
"Eduardo [HPro]" <contato@hpro.com.br> wrote:
Thanks Eduardo!

So, do you know if I change to Win2003 Server it will fix it?

David

>I Have a performance problem with DBISAM with Windows 2000 Server in a
>Quad.Core Xeon Intel Dell Server (2.4mhz).
> This server only runs DBISAM 4.22 Enginee Build 4. There are about 100
> conections active in general. Sometimes, when there are many big
> queries running on, I see that it's using only 2 processors of the 4 (the
> first and the third ones). Then the performance of the server is bad!
>
> In a dual core Xeon server it uses mostly one processor only.
>
> Is there a way to fix it?

This behavior is controlled by Windows and DBISAM does not have anything to
do with this. It (the DBISAM server) only creates new threads that are
controlled by the OS.

Eduardo
Tue, Nov 18 2008 2:40 PMPermanent Link

Tim Young [Elevate Software]

Elevate Software, Inc.

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Email timyoung@elevatesoft.com

David,

<< So, do you know if I change to Win2003 Server it will fix it? >>

Yes, 2003 will be able to take advantage of the newer multi-core processors.

--
Tim Young
Elevate Software
www.elevatesoft.com

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