> >Sent: Wednesday, October 15, 2003 9:25 AM
> >To: Multiple recipients of list ORACLE-L
> >Subject: Problem with undo tablespace and snapshot too old
> >
> >
> >Hi!
> >
> >We are experiencing a weird problem here...
> >
> >We have automat
t [mailto:[EMAIL PROTECTED]
>Sent: Wednesday, October 15, 2003 9:25 AM
>To: Multiple recipients of list ORACLE-L
>Subject: Problem with undo tablespace and snapshot too old
>
>
>Hi!
>
>We are experiencing a weird problem here...
>
>We have automatic undo management enab
Hi!
We are experiencing a weird problem here...
We have automatic undo management enabled and the undo tablespace is 6 GB in
size. undo_retention is set to 30 minutes.
when a certain transaction runs, it fails with ORA-1555 Snapshot too old,
although the undo tablespace only uses 700 MB (out of
un.com> cc:
Sent by: Subject: Re: Snapshot too old in undo
tablespace in 9i?
tion table in the header
> block),
> so there must be multiple rollback segments to handle potentially large
> numbers of transactions.
> UNDO tablespaces in Oracle9i allow an entire tablespace to become a single,
> large pool of undo blocks for use by any and all transactions.
> Instead
ller rollback
segments,
a single transaction can utilize all of the space in the UNDO tablespace,
if necessary. Many, many transactions can share that space also,
because the controlling transaction table is no longer contained in a
single database block,
avoiding contention for this important
update all columns of all rows in a table), only changes to table
are recorded to undo.
Tanel.
- Original Message -
To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]>
Sent: Tuesday, August 12, 2003 4:39 PM
> I have a 2gb UNDO tablespace. A third-party
ention time has not been reached, if
> space is needed. Dan does an excellent job of explaining that.
>
> He's off at the Hotsos Clinic now (lucky man!) or he'd be answering
> this himself
>
> --- [EMAIL PROTECTED] wrote:
> > I have a 2gb UNDO tablespace. A third-p
--- [EMAIL PROTECTED] wrote:
> I have a 2gb UNDO tablespace. A third-party application continually
> runs
> out of UNDO when it joins two tables to produce a result table. Our
> retention time is set to 15 minutes, the NoSpaceErrCnt in V$UNDOSTAT
> is
> always zero. The answer for t
nt
will go to the rollback to see what the update looks like BEFORE the transaction takes
place. This way you either have a select from data before an update takes place or
after a commit, after the update, Not half and half.
you probably need to increase the size of your undo tablespace. Just ge
e ORA-1555. If this is right,
basically, your join of death runs while updates are concurrently taking place (and
committed). As a result, when your select needs the data as it was when it started, it
has to look for them in the undo tablespace. After 15mn it's no longer here.
First th
undo tablespace
'UNDOTBSP' - 30036
Cause: the specified undo tablespace has no more space available.
Action: Add more space to the undo tablespace before retrying the
operation. An alternative is to wait until active transactions to commit
What I'm trying to get these guys to do is to apply
couple of hours longer than you think the
> export will take.
>
>
> "Guerra, Abraham
> J" ORACLE-L <[EMAIL PROTECTED]>
> @amfam.com> cc:
> Sent by: Subject: Snapshot too
I have a 2gb UNDO tablespace. A third-party application continually runs
out of UNDO when it joins two tables to produce a result table. Our
retention time is set to 15 minutes, the NoSpaceErrCnt in V$UNDOSTAT is
always zero. The answer for this from our vendor is to increase the size
of the
update began.
On a more positive note I agree that we need the text of the error message
in order to give some help.
Cheers,
Mike
- Original Message -
To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]>
Sent: Tuesday, August 12, 2003 4:39 PM
> I have
Title: Message
Hello
Group,
I just upgraded
a database to Oracle 9.2.0.3 from 8.1.7. I created an undo tablespace with
10 (default) undo segments... however, during an export I got the following
message:
ORA-01555: snapshot too old: rollback segment
number 15 with name "_SYS
cc:
Sent by: Subject: Snapshot too old in undo
tablespace in 9i?
Sent by: Subject: Snapshot too old in undo
tablespace in 9i?
s clear that RBSnn were created in an undo tablespace titled RBS.
To remove system managed undo segments (_SYSSMUn$) one must drop the undo tablespace
itself.
But, in your case, you will first have to:
1. Create a new, normal tablespace, say, rollback_ts, to hold new rollback segments
(do n
If you are now running in manual undo mode and have created rollback segments, you can
remove the undo segments. Verify that the segments are offline and you are not using
them. Then drop the undo tablespace. This is the only way to get rid of them.
[EMAIL PROTECTED] wrote:
>
> yes
PROTECTED] wrote:
>
> I use manual managed undo tablespace but there are some system named rollback
> segments on that
> tablespace ( I did not created them ) and they can not be dropped.
> What are they , how can I drop them.
> --
> Please see the official ORACLE-L FAQ:
select segment_name, tablespace_name from dba_rollback_segs;
SQL> select a.usn, a.name, b.status
2 from v$rollname a,
3 v$rollstat b
4 where a.usn = b.usn;
--- [EMAIL PROTECTED] wrote:
> I use manual managed undo tablespace but there are some system named rollback
> s
The scenario you describe is not consistent with manual undo. Was the database
created/started with automatic undo and you have switched to manual?
[EMAIL PROTECTED] wrote:
>
> I use manual managed undo tablespace but there are some system named rollback
> segments on that
> tab
tat b
4 where a.usn = b.usn;
--- [EMAIL PROTECTED] wrote:
> I use manual managed undo tablespace but there are some system named rollback
> segments on that
> tablespace ( I did not created them ) and they can not be dropped.
> What are they , how can I drop them.
> --
&
I use manual managed undo tablespace but there are some system named rollback
segments on that
tablespace ( I did not created them ) and they can not be dropped.
What are they , how can I drop them.
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: <[EM
er file.
Tanel.
- Original Message -
To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]>
Sent: Tuesday, July 29, 2003 1:04 PM
>
>when we were using oracle8i , whe had some process which use "set
transaction use rollback segment".
> and now we use
when we were using oracle8i , whe had some process which use "set transaction use
rollback segment".
and now we use undo tablespace and we have still same porocesses .
how can set a rollbback segment for process with undo tablepsace
--
Please see the official ORACLE-L
Can anyone point me to an article or white paper that goes into detail on
this. When I RTFM, it just says use Undo TBS, don't worrry about it and all
your problems will be solved.
We are upgrading from Oracle8 to 9i and currently have Rollback segments in
4 tablespaces spread over 4 disks. It look
Title: RE: Re[4]: undo tablespace
I think it might be a typo, or I've not had enuf coffee yet today, but the nologging on b.table2 wouldn't impact the redo logging; nologging on a.table1 would, tho...
> -Original Message-
> From: Breno A. K. Magnago [mailto:[EMAIL PRO
do log
HMNI> placement in order to handle the load.
HMNI> Regards,
HMNI> Mike Hately
HMNI> -Original Message-
HMNI> Sent: 29 January 2003 14:10
HMNI> To: Multiple recipients of list ORACLE-L
HMNI> Mike,
HMNI> I asked it because I have a problem.
HMNI> Any ins
FD> logs.
FD> Even with NOLOGGING, UNDO must be generated for read
consistency,
FD> rollback and recovery. You are not inserting data into the undo
tablespace.
FD> The undo entries are generated for each operation
(insert/update/delete).
FD> However, the undo entry for an insert is ve
-L <[EMAIL PROTECTED]>
Subject: RE: Re[2]: undo
tablespace
Sent by:
rollback and recovery. You are not inserting data into the undo tablespace.
FD> The undo entries are generated for each operation (insert/update/delete).
FD> However, the undo entry for an insert is very small and thus will consume
FD> very little undo space and redo.
FD>
to the archive_dump_dest filling up? If so, the problem is not
the
procedure, but rather the lack of proper process to manage your archive
logs.
Even with NOLOGGING, UNDO must be generated for read
consistency,
rollback and recovery. You are not inserting data into the undo
tablespace.
gt;
Sent by: [EMAIL PROTECTED]
01/29/2003 09:09 AM
Please respond to ORACLE-L
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
cc:
Subject: Re[2]: undo tablespace
Mike,
I asked it because I have a problem.
Any insert data
E-L
Mike,
I asked it because I have a problem.
Any insert data in UNDO tablespace generate insert in REDO Files. Is
is correct ?
When I execute a high procedure, many inserts in UNDO tablespace
ocurres, so many inserts in REDO´s are genereate.
I want to avoid this REDO´s generation.
My tables a
due to the archive_dump_dest filling up? If so, the problem is not the
procedure, but rather the lack of proper process to manage your archive
logs.
Even with NOLOGGING, UNDO must be generated for read consistency,
rollback and recovery. You are not inserting data into the undo tablespace.
The
transaction containing a direct-path INSERT statement cannot be
or become distributed.
--- "Breno A. K. Magnago" <[EMAIL PROTECTED]> wrote:
> Mike,
>
> I asked it because I have a problem.
> Any insert data in UNDO tablespace generate insert in REDO Files. Is
> is corre
Mike,
I asked it because I have a problem.
Any insert data in UNDO tablespace generate insert in REDO Files. Is
is correct ?
When I execute a high procedure, many inserts in UNDO tablespace
ocurres, so many inserts in REDO´s are genereate.
I want to avoid this REDO´s generation.
My tables and
ients of list ORACLE-L
I have a high procedure (many INSERT's and UPDATE´s).
This procedure generate insert's in UNDO TableSpace for rollback.
I want to know if exists any way for don´t generate insert´s in UNDO
Tablespace.
Oracle 9i / NT
Thanks.
--
Breno A. K. Magnago
I have a high procedure (many INSERT's and UPDATE´s).
This procedure generate insert's in UNDO TableSpace for rollback.
I want to know if exists any way for don´t generate insert´s in UNDO
Tablespace.
Oracle 9i / NT
Thanks.
--
Breno A. K. Magnago mailto:[EMAIL PROTECTED]
I am converting to 9i and am thinking about using the undo tablespace rather than
rollback segments. Does anyone know if there are any performance implications in using
the undo tablespace? I tried a big import that ran 21 minutes using rollback segments
and 23 minutes using the undo
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