RE: quick statistics question

From: Powell, Mark <>
Date: Wed, 17 Dec 2014 19:06:46 +0000
Message-ID: <>

You do not have to delete the statistics before you force the statistics to be re-gathered if you are going to use gather_table_statistics. If will replace what is there.

From: [] On Behalf Of Maureen English Sent: Wednesday, December 17, 2014 10:25 AM To:
Subject: quick statistics question

We just migrated our reporting instance from 10g to 11g and I planned to let Oracle do all the statistics gathering using the automatic jobs. Unfortunately, I also imported the statistics from the old database as part of the migration and now I have queries that are consistently hanging. I think I need a sanity check. Does it make sense to delete the statistics on the tables involved in these queries, and then gather them with the basic gather table stats statement? Since these are all materialized views that get refreshed (either complete or fast) just about every night, I was hoping that Oracle would just decide that statistics needed to be generated on them after they were refreshed.
- Maureen

Received on Wed Dec 17 2014 - 20:06:46 CET

Original text of this message