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Home -> Community -> Usenet -> c.d.o.server -> Re: RAC cache fusion details
DA Morgan wrote:
> Jerome Vitalis wrote:
> > DA Morgan wrote:
> >
> >> Yes.
> >
> > Did you publish the results anywhere on the web?
> >
> > TIA
> Have you read Oracle's license? <g>
;-)
From what we can read on the web about block sharing (e.g.
http://www.pythian.com/blogs/282/oracle-rac-cache-fusion-efficiency-a-buffer-cache-analysis-for-rac
), it's difficult to imagine any real-life database whose performance
would not suffer (maybe to a limited extent in the best cases) from being
turned into a RAC database.
The possible advantages provided by the huge global cache are probably not
so important in regard of the waits introduced by block sharing. Of course
RAC can provide other advantages such as distributed parallel execution.
But if a single server already has enough hardware resources (CPU, RAM, IO
bandwidth...) to handle the workload, it's difficult to see how a
migration to RAC could not hinder the performances (again: with
"unpartioned" apps).
That's why I wanted to know if we could find the results of such test cases anywhere on the web.
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