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Home -> Community -> Mailing Lists -> Oracle-L -> RE: More slower CPUs vs. fewer faster CPUs
I realize too that it depends on the number of concurrent user sessions.
Patrice Boivin
Systems Analyst (Oracle Certified DBA)
-----Original Message-----
From: Boivin, Patrice J [SMTP:BoivinP_at_mar.dfo-mpo.gc.ca]
Sent: Friday, February 23, 2001 9:20 AM
To: Multiple recipients of list ORACLE-L
Subject: More slower CPUs vs. fewer faster CPUs
I was wondering if it would be better to have three or four
relatively
slower CPUs than having only two faster ones.
I think I remember that Ixora says fewer faster CPUs is better
because the
CPUs are constantly negotiating who should do what. The more CPUs
exist the
more time-consuming the debate (this is very simplified, I realize).
Jonathan Lewis in Practical Oracle8i: Building Efficient Databases,
Adison
Wesley, p. says the opposite.
Is this another one of those questions that has "it depends" as the
only
answer? Or that has very plausible theoretical answers that are
mitigated
in real life? I imagine that the I/O patterns play a part in the
validity
of either answer.
Has anyone on this list tested to see which would be faster?
We are on Compaq Tru64 UNIX alphas, upgrading to ES-40s with up to
four
CPUs. My database is a mix (mess) of background tables for web
apps, ad hoc
querying, sporadic intensive data loads and in the near future:
replication.
Opinons?
TIA
Patrice Boivin
Systems Analyst (Oracle Certified DBA)
Systems Admin & Operations | Admin. et Exploit. des systèmes
Technology Services | Services technologiques
Informatics Branch | Direction de l'informatique
Maritimes Region, DFO | Région des Maritimes, MPO
E-Mail: boivinp_at_mar.dfo-mpo.gc.ca <mailto:boivinp_at_mar.dfo-mpo.gc.ca>
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Author: Boivin, Patrice J
INET: BoivinP_at_mar.dfo-mpo.gc.ca
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