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RAC some queries [message #439891]

Tue, 19 January 2010 22:03

Richard2009
Messages: 21
Registered: October 2009
Location: London

Junior Member

Hi Experts,

what's the advantages of having the different instances or databases on a node in RAC database

Please advise.

Regards,
Richard

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Re: RAC some queries [message #439893 is a reply to message #439891]

Tue, 19 January 2010 22:39

BlackSwan
Messages: 26766
Registered: January 2009
Location: SoCal

Senior Member

>what's the advantages of having the different instances or databases on a node in RAC database
The same pro & con arguments that apply to a stand alone system for having only 1 or more than 1 DB per system.

There is no 1 size fit all cases solution.
For some situations only 1 DB per system is better.
For some situations more than 1 DB is better.
It is a case by case decision & in some cases the deciding factor is not technical, but budgetary (hardware & license fees).

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Re: RAC some queries [message #439985 is a reply to message #439893]

Wed, 20 January 2010 08:02

Richard2009
Messages: 21
Registered: October 2009
Location: London

Junior Member

Hi BlackSwan,

Thanks for your repsonse. Are there any performance improvements if we create a separate instance with an user to retain historical data?

If not, can we create a database on the different server to retain the historical data?

Please shed some lights on this..

Thanks & Regards,
Richard

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Re: RAC some queries [message #439992 is a reply to message #439985]

Wed, 20 January 2010 08:18

Michel Cadot
Messages: 68757
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

I think we already answered to this question in your previous topic: Need for separate instance in RAC database
If not, tell us in which points.

Regards
Michel

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Re: RAC some queries [message #440004 is a reply to message #439985]

Wed, 20 January 2010 09:26

BlackSwan
Messages: 26766
Registered: January 2009
Location: SoCal

Senior Member

>Are there any performance improvements if we create a separate instance with an user to retain historical data?
At best with multiple instance, performance will stay the same.
Multiple instance means more overhead which can make things SLOWER.

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Re: RAC some queries [message #440054 is a reply to message #440004]

Wed, 20 January 2010 14:36

Richard2009
Messages: 21
Registered: October 2009
Location: London

Junior Member

Thanks Michel & BlackSwan

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