RE: Temp. segments/extents not being dropped

From: <Dan.Hubler_at_midata.com>
Date: Wed, 7 Jun 2000 11:56:22 -0500
Message-Id: <10521.108069@fatcity.com>

Up to an hour.

Is it correct to assume that extents allocated, for sort use, will not turn into "free space" but will be "free for use" by other transactions
once they are no longer inuse?

"Miller, Jay" <JayMiller_at_tdwaterhouse.com>@fatcity.com on 06/07/2000 10:15:11 AM

Please respond to ORACLE-L_at_fatcity.com

Sent by: root_at_fatcity.com

Sent From the mail file of: Dan Hubler

To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> cc:

Subject: RE: Temp. segments/extents not being dropped

Hmm, SMON only wakes up to clean up temp segments every 5 minutes. How long
after the SQL doing the sort was killed were you having the problems before you did the ALTER TABLESPACE command?

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

Sent: Monday, June 05, 2000 6:00 PM
To: ORACLE-L_at_fatcity.com
Cc: jaymiller_at_tdwaterhouse.com

I think I understand what you are saying.

But....................

My situation was that the extents were not being "released". That is, the space was unavailable for other transactions to use. We were failing with space errors.

Also, we do have the tablespace defined as TEMPORARY.

Thanks.

"Miller, Jay" <JayMiller_at_tdwaterhouse.com>@fatcity.com on 06/05/2000 03:05:08 PM

Please respond to ORACLE-L_at_fatcity.com

Sent by: root_at_fatcity.com

Sent From the mail file of: Dan Hubler

To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> cc:

If the tablespace is of type temporary then the extents do not get released.
They remain allocated (but unused)once the initial sort is done. This is a good thing, as it reduces the processing necessary for extent allocation.

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

Sent: Monday, June 05, 2000 3:03 PM
To: Multiple recipients of list ORACLE-L

Looking for some information on the following:

We had an incident last week where an Oracle instance (7.3.4.4) on NT was running into problems acquiring space for additional extents on the defined temporary tablespace.

While looking at the situation, we discovered that there was just about zero
free space left in the tablespace. There was a whole bunch of extents created and owned by "SYS" and they had some flaky numeric identifier for the segment-name (something like 37.123).

Other processes were failing, being unable to allocate temp space.

We looked around on Metalink, and discovered a note about forcing temporary segments/extents to be cleaned up by performing an "ALTER TABLESPACE TEMP DEFAULT STORAGE (PCTINCREASE 0);"

We executed the statement. Lo and behold, all the segments disappeared, back into
free space.

My guess is that there was a large sort (we do some of those) that failed, and left segments out there. I do not understand why they wouldn't clean up.

Any information?

--

Author:
INET: Dan.Hubler_at_midata.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists


--------------------------------------------------------------------

To REMOVE yourself from this mailing list, send an E-Mail message

to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
--

Author: Miller, Jay
INET: JayMiller_at_TDWaterhouse.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists


--------------------------------------------------------------------

To REMOVE yourself from this mailing list, send an E-Mail message

--

Author: Miller, Jay
INET: JayMiller_at_TDWaterhouse.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists


--------------------------------------------------------------------

To REMOVE yourself from this mailing list, send an E-Mail message

to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L Received on Wed Jun 07 2000 - 11:56:22 CDT