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Campbell, John (GE Money) - 27 May 2008 21:15 GMT

IDS 9.40.FC5 on Solaris 9. We migrated from a db server with 8 cpus to
one with 4 dual core cpus - 4-SMP Core CPUs 1.35 GHz. Is this actually
the equivalent of having 8 processors? I'm tuning as if they are the
same and performance is not bad but occassionally cpu is maxed out.

thx

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david@smooth1.co.uk - 27 May 2008 23:01 GMT

On 27 May, 21:15, "Campbell, John (GE Money)" <John.Campbe...@ge.com>
wrote:

> IDS 9.40.FC5 on Solaris 9. We migrated from a db server with 8 cpus to
> one with 4 dual core cpus - 4-SMP Core CPUs 1.35 GHz. Is this actually
> the equivalent of having 8 processors? I'm tuning as if they are the
> same and performance is not bad but occassionally cpu is maxed out.
>
> thx

It is not quite the same as dual cores share more components that true
individual processors e.g. bandwidth to memory can be less for
one core if the other one is busy. However I still tune as if it was 8
individual cpus as there is nothing special for dual core in the
Informix config.

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Fernando Nunes - 28 May 2008 01:49 GMT

> IDS 9.40.FC5 on Solaris 9. We migrated from a db server with 8 cpus to
> one with 4 dual core cpus - 4-SMP Core CPUs 1.35 GHz. Is this actually
[quoted text clipped - 3 lines]
>
> thx

It can really depend on the CPU architecture... not all cores are the same...

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