Re: RAC background process question

From: Dan Norris <>
Date: Thu, 12 Jun 2008 10:35:20 -0600
Message-ID: <>

DBWR is DBWR is DBWR. In RAC, pretty much all your single-instance knowledge is still valid. DBWR behaves pretty much the same as it does in single-instance. You'll have a few additional background processes in RAC, but all the single-instance processes will also be present in RAC and they have essentially the same function.


Riyaj Shamsudeen wrote:
> Rick
> Specification of these background processes are instance specific.
> So, if you have specified 10 DBWRs, then 10 DBWRs will be started in
> that instance. Every instance will have at least, minimally required
> background processes for a RAC instance such as LGWR, DBWR, PMON,
> LMD,LMON proceses etc..
> Cheers
> Riyaj Shamsudeen
> The Pythian Group
> Personal blog:
> Rick Ricky wrote:
>> I don't have RAC experience, but I am reading some RAC books/docs. I
>> have questions about processes like DBWR in RAC. Lets say I have 10
>> DBWR and I have 4 RAC nodes.
>> If I go to node 1, will I see 2-3 DBWR running on node 1? Do the DBWR
>> run on different nodes as needed?
>> I know that some processes (like LGWR) run on each node. But what
>> about the ones that are not node specific?
> --

Received on Thu Jun 12 2008 - 11:35:20 CDT

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