hyperthreading and onconfig parameters


We are upgrading our database servers to HP ProLiant DL380 G4 two-way
systems. This platform supports enabling or disabling "hyperthreading".
(See, for example, http://sysadminforum.com/t36970.html.)

With hyperthreading enabled, the OS (Solaris 9, x86) sees 2 logical
processors for each physical processor.

With IDS (7.31), is it better to enable or disable hyperthreading? Is
the answer situational? How would you configure the following onconfig
parameters?

MULTIPROCESSOR
NUMCPUVPS
SINGLE_CPU_VP
AFF_SPROC
AFF_NPROCS

sending to informix-list
.

Relevant Pages

  • Re: Hyperthreading or not?
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    ... Chandra Chilmakuri wrote: ... as if having hyperthreading enabled would ... halve performance. ... is behind the observed behavior by disabling it as Chandra said. ...
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    ... Points to Alan Cox for pointing the right direction. ... (I'm enabling, not disabling.) ...
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  • Re: Hyperthreading Technology
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  • Re: Connection Error
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    (microsoft.public.sqlserver.connect)