RE: Long term AWR retention

From: Stephens, Chris <>
Date: Mon, 14 Nov 2011 15:38:31 -0600
Message-ID: <>

If space is an issue in the database you would like to keep historical AWR data for, then you can always export the AWR data via the scripts provided in $ORACLE_HOME/rdbms/admin and build a dba data warehouse on a separate server for analysis across all databases. That also (obviously) has the benefit of offloading any resource intensive SQL you would like to run against the captured performance data.

I think Mark Farnham (sp?) was the first person I noticed pushing this idea and I have plans to implement this in the very near future.


-----Original Message-----

From: [] On Behalf Of Allen, Brandon Sent: Thursday, November 10, 2011 12:31 PM To:; Subject: RE: Long term AWR retention

Just something else to keep in mind – it can take a significant amount of space to store a lot of history, especially if you increase the frequency of snapshots to 15 minutes like I do and run them 24x7. On one of my systems the perfstat schema is about 12GB for approximately 6 months of snapshots taken at 15 minute intervals 24x7. I’m guessing AWR would be similar. I know 12GB isn’t huge by today’s standards, but just something to consider. If you use statspack you can cut down on the space consumption by increasing the thresholds for the top SQL that is captured. Tim Gorman has a good script for that here:

I think you can do the same thing for AWR but can’t remember for sure off the top of my head.


From: Charles Schultz [] Sent: Thursday, November 10, 2011 10:38 AM

What is the real downside to setting retention to something, like, 10 years?

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-- Received on Mon Nov 14 2011 - 15:38:31 CST

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