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Home -> Community -> Mailing Lists -> Oracle-L -> Re: Quick migration question
Diego,
If you have java objects installed then you may add atleast around 1 hour 30 minutes more than normal migration time. I have migrated 7/8 databases from 8.1.7.4 to 9.2.0.X in 1 to 3 hours including recompilation of objects.
If you are talking about Oracle Financials database, it depends on much modules you have installed. Just recompilation of invalids might take around 3 to 4 hours depending upon power of your server.
Regards
Rafiq
From: "Diego Cutrone" <diegocutrone_at_yahoo.com.ar>
Reply-To: oracle-l_at_freelists.org
To: <oracle-l_at_freelists.org>
Subject: Re: Quick migration question
Date: Wed, 7 Jul 2004 09:29:52 -0700
Tanel,
Thank you very much for the insight, it's been very useful for me.
Regards
Diego.
> The upgrade speed doesn't really depend on how much actual data you got
in
> your tables.
> The most time-consuming job in an upgrade like this, is the migration of
> data dictionary and recompilation of objects. Other changes, like
changing
> controlfiles, datafile headers, logfiles and rollback segments, will
usually
> take little time.
>
> Oracle will NOT go through any datafile to change or reformat any
datablocks
> during the upgrade (it didn't do so even when the data block format
changed
> fundamentally between version 7.3 and 8, it just reformatted required
blocks
> later on, "on the fly").
>
> So if you don't have much more objects and PL/SQL in your current system
> than the last one upgraded (and don't have tens of thousands of
datafiles),
> you should be able to complete your upgrade about in the same timeframe
than
> the last one.
> I'd say in less than couple of hours without any tweaks or tricks, given
> than you could recompile your PL/SQL & other objects in parallel.
>
> It's possible to get the upgrade process very fast - but this means
> unsupported parameters & techniques.
>
> Tanel.
>
> ----- Original Message -----
> From: "Diego Cutrone" <diegocutrone_at_yahoo.com.ar>
> To: "Oracle List" <oracle-l_at_freelists.org>
> Sent: Wednesday, July 07, 2004 4:41 AM
> Subject: Quick migration question
>
>
> > Hi list,
> > Based on your experience, how much time you think it may take to
migrate
a
> 2.1 TB database from 8.1.7 to 9.2
> > by using "startup migrate" procedure. The database is in a HP Superdome
> with 16CPUs 64GB Ram.
> > I know the time depends on many other factors but I'd just like to have
a
> rough estimation....that's all.
> >
> > I have used this procedure in a much smaller database and didn't take a
> long time to complete,
> > I wonder how much it will take in a much bigger database. Had anyone
> performed a migration like this?
> >
> > Thanks in advance.
> > Regards
> > Diego.
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