Re: Hugepages question with multiple instances on 1 host
- From: Nuno Souto <dbvision@xxxxxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Thu, 02 May 2013 20:36:18 +1000
I do recall the advice Andrew mentions. In fact, for a long time the
folks at Sun always made a point that nothing in their OS advanced
features was designed to help Oracle databases. But that was before the
big purchase...
Good for you on the Solaris thing, Amir. Pity in the last 10 years of
discussions here and in other places about ISM and largepages in various
environments, your voice was never heard! It would have been really
helpful way back then to dispel the wrong notions folks have about
largepages. And why everyone should be using them where available!
You might want to peruse Kevin's blog as well, there are quite a few
discussions about those there.
But coming back to what the OP wanted: is it or is it not possible to
have two instances in the same Solaris db server, one instance using
largepages and the other not? I gather yes - using the parameter that
was described before - but I may well be wrong: been more than 10 years
since I last touched Solaris.
--
Cheers
Nuno Souto
dbvision@xxxxxxxxxxxx
On 2/05/2013 8:51 AM, Hameed, Amir wrote:
> I have been working with Oracle and Solaris for a long time and no one from
> Oracle has ever advised us not to use ISM. It does not have anything to do
> with Oracle buying Sun either, which happened in 2009. You might be confusing
> DISM (Dynamic Intimate Shared Memory) with ISM.
> From: Andrew Kerber [mailto:andrew.kerber@xxxxxxxxx]
> Sent: Wednesday, May 01, 2013 2:57 PM
> To: Hameed, Amir
> Cc: dbvision@xxxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx
> Subject: Re: Hugepages question with multiple instances on 1 host
>
> Up until Oracle bought Sun, the advice from Oracle was do not use ISM. But I
> think some of that was because no one really understood ISM. I looked around
> quite a bit, and never could find a good explanation of ISM and DISM terms
> and usage. If such a thing exists now, I would really appreciate it if
> someone could point me to it. I dont use much Sun currently, but I wouldn't
> mind keeping up with what is going on with it.
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