RE: "Headroom" in datafiles?
Date: Wed, 16 Sep 2009 14:23:38 -0400
I like the idea of ASM instances, but have not implemented one yet. As for file systems, ours don't grow extra ordinarily fast, so I just set autoextend on umlimited growth. And have a job in enterprise manager that polls all the databases on all servers once/day and emails if there is a tablespace where all the datafiles are greater than 30Gbs (8K block). Then I add another datafile.
SysAdmin monitors and grants space on the box (san). So my datafiles are always basically full, (autoextending), so I just monitor there size as described. Works for me, and is very simple.
[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.
I could fix each datafile to have 10% free space at all times
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.
Sr. Oracle DBA
Ingram Barge Company
Nashville, TN 37205
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