RE: temp tablespace blow up
- From: <Jay.Miller@xxxxxxxxxxxxxxxx>
- To: <lyallbarbour@xxxxxxxxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 16 Aug 2007 18:55:35 -0400
Just because no one else mentioned it (that I noticed) I'll point out
that having a large number of extents in the temp tablespace is fine and
no reason to drop it. The temporary extents are reused whenever needed.
If you are ever concerned about current usage of the temp tablespace you
can look at v$sort_usage.
Jay Miller
Sr. Oracle DBA
201.369.8355
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Lyall Barbour
Sent: Tuesday, August 14, 2007 2:18 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: temp tablespace blow up
just ran an update that had some stupid huge joins and couldn't allocate
anymore extents because the 4gb of datafiles were too small. So my
update errored. then, no problem still, just that my temp tablespace
had an enormous amount of extents. So, i dropped it when users were off
and recreated it as TEMPORARY. I've been reading about temporary
tablespaces:
CREATE TEMPORARY TABLESPACE blah TEMPFILE '/d01/oradata/PROD/blah.dbf'
size 1000M;
apparently this creates the idea of a file on the OS. Maybe my question
is really what is a TEMPFILE?
----- Original Message -----
From: "Don Seiler"
To: lyallbarbour@xxxxxxxxxxxxxxx
Subject: Re: temp tablespace blow up
Date: Tue, 14 Aug 2007 09:43:37 -0500
A temporary tablespace is what you want for TEMP.
I'm curious as to how you think you blew it up, and even more
curious
as to how Oracle let you drop it. What version of Oracle are you
using?
Don.
On 8/14/07, Lyall Barbour wrote:
> Hi all,
> So, i blew up _the_ temp tablespace the other day with an
update query
> *pats himself on the back*. I found some down time and dropped
it, looking
> up on the web how to recreate it, i found CREATE TEMPORARY
TABLESPACE and
> created it as "temporary" not realizing what i was doing (just
hadn't done
> it in awhile).
> Now, night reports and such take 4 hrs instead of 4 mins to
run.
> Now that i've found the basic syntax to create a tablespace
again, my only
> real question is if someone can explain about TEMPORARY
tablespaces and what
> good they'd be for? Are they good for the "temp" tablespace
for queries
> cause there's only two reasons i found for the huge amount of
time
> difference for the night process 1) tablespace used to be
regular 4 gig
> tablespace, now it's "TEMPORARY" 2) i created the extents
wrong and instead
> of being 767 extents it was 37000.
>
> What is a TEMPORARY TABLESPACE?
>
> Lyall
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Don Seiler
oracle: http://ora.seiler.us
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