IME the 'trouble' of managing rollback segments
is grossly exaggerated. They rarely cause me
any trouble.
Only errant programmers cause me problems.
Jared
DENNIS WILLIAMS <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
03/17/2003 06:28 AM
Please respond to ORACLE-L
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
cc:
Subject: RE: Autoallocate (was Re: LMT monitoring)
Alex
If you do not specify the UNDO TABLESPACE when creating the database
then
AUTOEXTEND is set to ON. I was able to alter that to OFF.
The point of the UNDO is that it is automatically managed by Oracle. If
you can't cope with that, or you decide that doesn't work well for you,
then
you can revert to the old manual ROLLBACK segments. I think that few sites
had their rollback segments properly configured, and Oracle has been
criticized for requiring a lot of expert attention compared to other
databases. This is Oracle's attempt to reduce the TCO (Total Cost of
Ownership).
Dennis Williams
DBA, 40%OCP, 100% DBA
Lifetouch, Inc.
[EMAIL PROTECTED]
-----Original Message-----
Sent: Sunday, March 16, 2003 10:59 PM
To: Multiple recipients of list ORACLE-L
How about UNDO tablespace in 9.2?
It gets created with "autoallocate", and there is no way to change it or
specify any parameters for undo segments.
Each segment extended as needed, and when shrinked deallocated some
extents
not necessary the last, than allocate new extent.
Alex.
----- Original Message -----
To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]>
Sent: Wednesday, March 12, 2003 2:22 PM
You do get odd results. The last time I tested on
a clean tablespace, an initial of 65MB gave me
a consistent result which I recall as:
Extent 0 at 8MB
Extents 1 - 56 at 1MB each
Extent 57 at 8MB
----- Original Message -----
To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]>
Sent: Tuesday, March 11, 2003 6:23 AM
case
when initial_extent < 1m then
case when extents < 16 then next = 64k,
when extents < 80 then next = 1m,
when extents < 200 then next = 8m,
else next = 64m
when initial_extent >= 1m then
case when extents < 64 then next = 1m,
when extents < 184 then next = 8m,
else next = 64m )
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: Alex Feinstein
INET: [EMAIL PROTECTED]
Fat City Network Services -- 858-538-5051 http://www.fatcity.com
San Diego, California -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: [EMAIL PROTECTED] (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).
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: DENNIS WILLIAMS
INET: [EMAIL PROTECTED]
Fat City Network Services -- 858-538-5051 http://www.fatcity.com
San Diego, California -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: [EMAIL PROTECTED] (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).
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author:
INET: [EMAIL PROTECTED]
Fat City Network Services -- 858-538-5051 http://www.fatcity.com
San Diego, California -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: [EMAIL PROTECTED] (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).
