RE: "Headroom" in datafiles?

    I don't really worry about datafiles that get "too full". What I do worry about is an object that can't allocate an extent within the tablespace.  

Dick Goulet
Senior Oracle DBA/NA Team Lead
PAREXEL International  

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Taylor, Chris David Sent: Wednesday, September 16, 2009 11:27 AM To: 'oracle-l_at_freelists.org'
Subject: "Headroom" in datafiles?

I'm curious how much "headroom" people like to maintain in their datafiles? We have a large data reorganization procedure underway as part of our DR discovery process and I was playing around with some ideas.  

I was thinking, we could allocate a fixed size for each datafile (say 32G for example) and not worry about space or autoextend until we reached some threshold.
OR
I could fix each datafile to have 10% free space at all times OR
something similar.  

I think what bothers me is knowing that some of my datafiles are "99%" full for example while others are 5% full in the same database.  

Do any of you get bothered by datafiles being a certain % "full"?  

We've got gobs of disk space "right now" so I've been pushing this to the back burner for a while for coming up with a cohesive policy on datafiles.  

Thoughts?  

Chris Taylor
Sr. Oracle DBA
Ingram Barge Company
Nashville, TN 37205
Office: 615-517-3355
Cell: 615-354-4799
Email: chris.taylor_at_ingrambarge.com  

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