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Hyperthreading / Linux / DB2 V8.1 FP4 - performance

This is a discussion on Hyperthreading / Linux / DB2 V8.1 FP4 - performance within the DB2 forums, part of the Database Server Software category; --> Hello, we investigated a performance-drop while using DB2 V8.1 on a Linux-Server (SuSE - SLES) and Hyperthreading activated. (Dual ...


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  #1 (permalink)  
Old 02-26-2008, 04:15 PM
joerg
 
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Default Hyperthreading / Linux / DB2 V8.1 FP4 - performance

Hello,
we investigated a performance-drop while using DB2 V8.1 on a
Linux-Server (SuSE - SLES) and Hyperthreading activated. (Dual XEON
2.4 2GB)

The intraparallel-option is set and the client establishes 10
independant threads.
With hyperthreading activated, the performance drop with factor 2 (4
min -> 8 min). Is there any possibility to configure DB2 to use this
feature ?

Thanks

Joerg
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  #2 (permalink)  
Old 02-26-2008, 04:18 PM
Fan Ruo Xin
 
Posts: n/a
Default Re: Hyperthreading / Linux / DB2 V8.1 FP4 - performance



joerg wrote:

> Hello,
> we investigated a performance-drop while using DB2 V8.1 on a
> Linux-Server (SuSE - SLES) and Hyperthreading activated. (Dual XEON
> 2.4 2GB)
>
> The intraparallel-option is set and the client establishes 10
> independant threads.
> With hyperthreading activated, the performance drop with factor 2 (4
> min -> 8 min). Is there any possibility to configure DB2 to use this
> feature ?


All DB2 EDUs are implemented as processes on UNIX and Linux.

>
>
> Thanks
>
> Joerg


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