RE: Oracle Total Recall performance vs Materialized Views
- From: "Patterson, Joel" <jpatterson@xxxxxxxxxx>
- To: "cicciuxdba@xxxxxxxxx" <cicciuxdba@xxxxxxxxx>, oracle-l-freelists <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 29 Jul 2013 13:53:35 -0400
Putting the set of tables in a refresh group is not an option? I understood
that a consistent refresh of the set was possible.
Joel Patterson
Database Administrator
904 928-2790
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Joel Patterson
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From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Guillermo Alan Bort
Sent: Monday, July 29, 2013 12:00 PM
To: oracle-l-freelists
Subject: Oracle Total Recall performance vs Materialized Views
Hi,
We are having a discussion about the following:
we have a set of tables, from these tables we need to have a snapshot of the
table at 00:00:00 exactly (all the tables at the same time). Right now we are
using materialized views and we refresh them nightly. Of course this is a weak
solution as if any refresh fails, we loose consistency.
as I don't like square wheels and the architect can't seem to build a round
one, I suggested using Oracle Total Recall, which based on the documentation
does everything we need (including guaranteeing consistency and stuff like
that).
The architect claims that the performance on the queries with flashback (with
FDA enabled) is unacceptable for the application. I am certain he didn't
perform any testing, and I will do so as soon as I finish building the
environment, but I'm sure there are some people out there who have already
implemented total recall in production so my question to you is what is the
performance overhead of FDA (I've read about the overhead during commit, and
the restriction regarding DDLs; I'm wondering about the performance of queries).
Thank you very much,
Alan.-
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