Re: Dual core sun boxes

  • From: Paul Drake <bdbafh@xxxxxxxxx>
  • To: makbo@xxxxxxxxxxx
  • Date: Tue, 12 Apr 2005 11:59:02 -0400

On Apr 12, 2005 11:39 AM, Mark Bole <makbo@xxxxxxxxxxx> wrote:
> You can find the licensing guidelines at which includes the
> following statement (quoted below) regarding dual core machines.
> What I find very confusing, is that an Intel chip with hyperthreading
> enabled will show also show up as 2 CPU's both to the OS (e.g. Linux)
> and Oracle, yet my boss in a previous assignment said that the Oracle
> sales rep told him it still only counted as one CPU for licensing
> purposes. Go figure.
> "When counting the number of processor licenses required, Oracle counts
> all the physical processors in a server where Oracle is installed and/or
> running. A multicore chip with N processor cores is treated as N
> processors. For example, a chip that has 2 processor cores on it, would
> need to be licensed for 2 processors, even though there is a single chip
> that holds the processors."
> --
> Mark Bole


That is the difference between full cores and "HypeThreading".
As far as we've been informed, on IA32 the hypterthreaded processor
does not count for licensing. It took more than a year to get that
guideline out of Oracle ... so we had disabled hyperthreading by
default on new servers. If the server only had one physical CPU, that
meant patching the HAL when enabling the hypertheading functionality.
One must choose wisely when selecting the proper HAL ... lest the OS
be cast into the land of BSOD where only the disk of re-installation
can revive it.

Mladen, please take it from here.


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