RE: Warning - upgrade gotcha

From: Paul Houghton <>
Date: Wed, 12 Feb 2014 16:10:23 +0000
Message-ID: <>

The wri$_optstat_histhead_history is not partitioned in our instances, so presumably it would take time whichever version was being upgraded from.

I note it is partitioned in 12.1, so this will affect us when we upgrade from to 12.1 as we don't intend to go through

Thanks for the heads up.

From: [] On Behalf Of Hemant K Chitale Sent: 12 February 2014 15:47
Subject: Re: Warning - upgrade gotcha

And we tell our customers / managers that upgrade duration is not related to the volume (size of the database). Was this upgrade from 10.2 or 11.2 ?

Hemant K Chitale

On Feb 12, 2014 11:36 PM, "Chris Dunscombe" <<>> wrote: Hi all,

Just in case you've not come across it there's a potential gotcha when upgrading to We hit it a couple of weeks ago and I believe it affects all platforms.

The issue is caused by the database upgrade script, catupgrd.sql, partitioning the statistics history tables, wri$_optstat_histhead_history etc. So if you've got a lot of data in these tables, either because you're keeping a lot of history or the automatic purge job (runs in the maintenance window) isn't clearing the data down, then the partitioning can take many hours and hence the upgrade takes many hours.

The exact time all depends on your hardware and the amount of data in these history tables. Generally the biggest table is wri$_optstat_histhead_history. The readme doesn't make any reference to this

HTH Cheers,


Received on Wed Feb 12 2014 - 17:10:23 CET

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