Re: Hyperthreading boosts or slows down Domino? (SLES8, Domino 6.5.1)

Hi Alex,

I have experienced problems using HT with SLES8+SP2 under some machines IBM xSeries, but the problem is relationed with machine BIOS version. After the BIOS update, the problems doesn't appear (note: the system are reinstalled, because Domino had some inconsistence)

Regards,

Fabiano Felix

On Apr 30, 2004 05:10 AM, [email protected] wrote:

> 
> 
> 
> 
> Dear all,
> 
> i am running Domino in a cluster on two HP ML 570 with 2x Xeon 2,8 Ghz. (2
> MB L3)
> Hyperthreading (HT) is activated so Linus shows 4 Processors.....
> Affect is that Availability Index is jumping from 0 - 100 sometimes even
> there is less workload. Ok i now that internal calculation of Avail.Index
> in R6 has changed and this behaviour is quite normal...
> 
> But basically i would like to know, if Domino can scale 2 virt. cpu's or
> not. ?
> I am feeling that Domino will get more data throughput with HT
> deacitivated, using only two strong physical cpu's. Further i red that HT
> is slowing down linux generaly with Kernel .20 or .21....
> 
> Anybody got already some experiences with this issue or already done some
> workload comparisons with HT on/off.
> Any help/hints are highly welcome.
> 
> thanks and best regards,
> Alex
> 
> 
> 
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