RE: automatic extent allocation
- From: "Goulet, Dick" <DGoulet@xxxxxxxx>
- To: <roger_xu@xxxxxxxxxxx>, "Jonathan Lewis" <jonathan@xxxxxxxxxxxxxxxxxx>, "Oracle-L@Freelists. Org (E-mail)" <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 7 Jan 2005 16:04:19 -0500
2147483645=20
Dick Goulet
Senior Oracle DBA
Oracle Certified 8i DBA
-----Original Message-----
From: Roger Xu [mailto:roger_xu@xxxxxxxxxxx]=20
Sent: Friday, January 07, 2005 3:53 PM
To: Jonathan Lewis; Oracle-L@Freelists. Org (E-mail)
Subject: RE: automatic extent allocation
So the suggestion would be to move it to its
own tablespace with uniform extent allocation?
What is Oracle 9i's limit as far as the number
of extents in a table? Thanks.
-----Original Message-----
From: Jonathan Lewis [ mailto:jonathan@xxxxxxxxxxxxxxxxxx]
Sent: Friday, January 07, 2005 2:33 AM
To: Roger Xu; Oracle-L@Freelists. Org (E-mail)
Subject: Re: automatic extent allocation
In the first place, I would consider moving the
object out of the current tablespace (or move
everything else out of the tablespace) because
it sounds like nothing else should be sharing that
tablespace. (Consider the problem of recovering
the entire tablespace because one of the other tables
gets a corrupt block - if you can't take advantage
of rman block level recovery).
Secondly, at 3GB per month, I would consider
partitioning the table at something like one partition
per month - thus making your question moot.
It sounds like your object is still using 64MB
extents - it would be interesting to see if there
is another step size when you hit a total of 64GB,
or whether you keep going at 50 extents per month.
I suspect the problems you __might__ get from having
2,000 extents are much less significant than the problems
you __might__ get if you have a 100GB segment by the end
of next year.
Regards
Jonathan Lewis
http://www.jlcomp.demon.co.uk/faq/ind_faq.html
The Co-operative Oracle Users' FAQ
http://www.jlcomp.demon.co.uk/seminar.html
Public Appearances - schedule updated Dec 23rd 2004
----- Original Message -----
From: "Roger Xu" <roger_xu@xxxxxxxxxxx>
To: "Oracle-L@Freelists. Org (E-mail)" <oracle-l@xxxxxxxxxxxxx>
Sent: Thursday, January 06, 2005 11:54 PM
Subject: automatic extent allocation
Hi list,
We are on Solaris 9/Oracle 9i with locally managed tablespace.
There is a huge tablespace in our database with many huge tables.
The biggest table has a size of 60 GB. (Indexes are in a different
tablespace)
And it has 1030 extents now, because we use automatic extent allocation.
Right now we do not have any issues. Do you recommend me to move it to
its
own tablespace with uniform extent allocation? At what point are we
going to
have issue? over 2000 extents? The table is growing at a rate of 3 GB /
month.
TIA,
Roger
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