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cpu

Posted in 2008

Topics: Performance & Tuning, Platform-Specific Issues, Versions, Editions & End-of-Life

Campbell, John (GE Money) — — source: Usenet: comp.databases.informix

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

↪ replying to Campbell, John (GE Money)
david@smooth1.co.uk — — source: Usenet: comp.databases.informix

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.

↪ replying to Campbell, John (GE Money)
Fernando Nunes — — source: Usenet: comp.databases.informix

Campbell, John (GE Money) 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 can really depend on the CPU architecture... not all cores are the same...

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