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Re: New challenge - clustering - do I understand this correctly?

From: Connor McDonald <connor_mcdonald_at_yahoo.com>
Date: Tue, 12 Aug 2003 22:00:54 +0800
Message-ID: <3F38F316.52E6@yahoo.com>


Noons wrote:
>
> "quarkman" <quarkman_at_myrealbox.com> wrote in message news:oprtr4yir5zkogxn_at_haydn...
>
> > >
> > > I don't understand how you can think RAC/OPS is harder on the
> > > administrator. All that happens is that a second instance recovers
> > > transactions from the failed instance. All else runs along same old same
> > > old. What in that requires "complication" from the administrator?
> >
> >
> > Beg to differ. Tuning the beasties is a good deal more complicated than
> > tuning a single instance. Care to knock up a GC_FILES_TO_LOCKS parameter
> > off the top of your head? And where's the white paper to tell me what a
> > good number of multi-block locks is, and when I should group them? And
> > where did Oracle get the idea from that LMS and LMD should have latencies
> > of less than 20 milliseconds? Where'd that number come from?! Where's the
> > scientific proof behind the statistics that the Oracle doco. trots out for
> > these RAC-specific tuning measures?
>
> Like I said: setup. Get a consultant that knows the stuff,
> install it and setup all important parameters. review once
> in a while. unless the app is so highly variable that it
> needs daily tuning, that's all you need.
>
> Now, one node goes down and it needs lengthy admin intervention?
> I don't think so. If it does, then there is something very wrong
> in the product being delivered...
>
> --
> Cheers
> Nuno Souto
> wizofoz2k_at_yahoo.com.au.nospam

Well, thats pretty much OPS in a nutshell...takes a while to sort out all those locks :-(

-- 
=========================
Connor McDonald
http://www.oracledba.co.uk

"Some days you're the pigeon, some days you're the statue"
Received on Tue Aug 12 2003 - 09:00:54 CDT

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