Re: Thoughts on instance crash and RAC

From: joel garry <>
Date: Tue, 20 Aug 2013 13:18:10 -0700 (PDT)
Message-ID: <>

On Tuesday, August 20, 2013 4:48:13 AM UTC-7, vsevolod afanassiev wrote:
> Some thoughts on instance crash and RAC:
> - Main selling point of RAC is that it increases availability: if one node crashes other nodes are still available. During presentations Oracle guys would crash an instance by killing PMON and show that the database is still accessible through other nodes.
> - However in my experience this isn't very realistic scenario. Oracle instances rarely experience such “instant” crash – an instance was running without problems and then few seconds later it is completely gone. More often an instance would struggle for a while – may be for 10 minutes, may be for half an hour. Things like latch waits, library cache wait, etc. would appear, may be with ORA-00600 and 7445 errors, may be 4031. However crash is unlikely or it will take a while. Instance "death" became slow and painful.

You should probably google:
you probably don't need rac


-- is bogus.
Received on Tue Aug 20 2013 - 22:18:10 CEST

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