Re: Patching RAC
- From: "jason arneil" <jason.arneil@xxxxxxxxx>
- To: Lisa.Koivu@xxxxxxxxxxxxxx
- Date: Wed, 28 May 2008 08:40:59 +0100
Hello,
Here is my 2p worth:
Are you going to be running the view_recompile sql script? If so, this
requires that the database is opened with upgrade. Of course to get the full
benefit of patching you need to do this recompilation. So you could argue,
if you are needing downtime anyway, if you felt uncomfortable running
catpatch.sql with the db open, it will not add much downtime to run this
while the db is in the startup upgrade state.
That being said I have applied the catpatch.sql with a RAC db open and it
was fine. I think Oracle are under increasing pressure to ensure that
patches can be applied with the db open, so this is probably going to be
more and more of an occurance - you don't want to pay huge amounts of money
for RAC to then find you need downtime to plug security holes 4 times a
year.
Another option, if this is open to you, is instead of taking a downtime hit
with the april CPU, is to take the downtime hit with an upgrade to 10.2.0.4,
as this includes the fixes from the April CPU and you'll some extra bug
fixes and enhancements. You might say this requires more testing, but, you
are going to test the CPU anyway, right?
jason.
--
http://jarneil.wordpress.com
On Tue, May 27, 2008 at 5:16 PM, Koivu, Lisa <Lisa.Koivu@xxxxxxxxxxxxxx>
wrote:
> Hello all,
>
>
>
> I am the proud mother of a new RAC installation J
>
>
>
> My first task with this RAC system was to patch it. I successfully
> completed a rolling patch on the clusterware, and then patched the asm and
> db homes separately. I was thinking through how the database patches had to
> be applied (catpatch.sql) and it makes sense to me that the database should
> be unavailable throughout the execution of this script, as we are updating
> the data dictionary within the database (which there is only one of.)
>
>
>
> Now I'm testing the April 2008 CPU. The docs say that the database can be
> up and available while executing catcpu.sql. It also makes no mention of
> patching the clusterware.
>
>
>
> My questions are:
>
>
>
> 1. Has anyone ever had a CPU patch go south because the database was in
> use?
> 2. Am I the only one who is nervous running something that is modifying
> the data dictionary while the database is open for general use?
> 3. Are there CPU patches for the clusterware? I don't see any.
>
>
>
> And as a tidbit, to those of you who may not already know this: When
> creating a database with dbca, don't use the template databases if you can
> avoid it (general purpose, data warehouse, transaction processing). These
> preconfigured databases save time within the database creation process, but
> they include the java engine within the database. It takes a long time to
> patch the jvm.
>
>
>
> (May eons ago I had a major patch end up in a recovery because of the
> database jvm. What a nightmare that was)
>
>
>
>
>
> *Lisa Koivu*
>
> *Oracle Database Administrator*
>
> *desk: 407-903-4691*
>
> *cell: 954-683-4459*
>
>
>
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