> >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?
Stephen,
Tim's statement is correct, but can be construed incorrectly if you read it and think
of TEMP segments. AUM still uses undo segments (same basic structure as rollback
segments). However, one of the space management steps is to allow an undo segment to
'steal' extents from another undo
un.com> cc:
Sent by: Subject: Re: Snapshot too old in undo
tablespace in 9i?
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
What gets me here is that there are no other transactions occurring using that table.
Now there are alot of other long running transactions occuring at that time, but they
do not involve the table that was being analyzed.
any suggestions on what to check for?
--
Please see the official ORACLE
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?
to. So it
dissapears.
Therefore snapshot too old. You have a few options here.
you need to analyze your process and see what is going on. IF your doing an insert
select on the same table and another transaction is doing an update. Your insert
select wont see the changed records. Does this matter?
delete
create index.
correct?
>
> From: "Smith, Ron L." <[EMAIL PROTECTED]>
> Date: 2003/07/28 Mon PM 01:24:23 EDT
> To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
> Subject: RE: Oracle Snapshot Too Old during programatic load
>
> The index
he index to the table in the TEST database I start
> getting Snapshot Too Old errors. I added 25% more space to the RBS
> tablespace but it didn't do any good. I also tried reducing the
> frequency of commits as suggested in Oracle papers but I still get
> the same error. If I remov
t ORACLE-L <[EMAIL PROTECTED]>
> Subject: Oracle Snapshot Too Old during programatic load
>
> I asked this last week, but I have a little more info this week.
>
> I have a table that gets programmatically loaded each night. The table
> needs to have an index added for repor
Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
> Subject: RE: Oracle Snapshot Too Old during programatic load
>
> The index is not set up with nologging. I can build the index after the
> load with no problem. There is no other activity in the database
able that gets programmatically loaded each night. The
table
> needs to have an index added for reporting purposes. However, when
I
> add the index to the table in the TEST database I start getting
Snapshot
> Too Old errors. I added 25% more space to the RBS tablespace but it
> didn
eeds to have an index added for reporting purposes. However, when I
> add the index to the table in the TEST database I start getting
> Snapshot
> Too Old errors. I added 25% more space to the RBS tablespace but it
> didn't do any good. I also tried reducing the frequency of commi
y loaded each night. The
> > table needs to have an index added for reporting purposes. However,
> > when I add the index to the table in the TEST database I start getting
>
> > Snapshot Too Old errors. I added 25% more space to the RBS tablespace
>
> > but it didn&
is week.
>
> I have a table that gets programmatically loaded each night. The
table
> needs to have an index added for reporting purposes. However, when
I
> add the index to the table in the TEST database I start getting
Snapshot
> Too Old errors. I added 25% more space to the RBS tablespace but
to have an index added for reporting purposes. However,
> when I add the index to the table in the TEST database I start getting
> Snapshot Too Old errors. I added 25% more space to the RBS tablespace
> but it didn't do any good. I also tried reducing the frequency of
> commits
more info this week.
>
> I have a table that gets programmatically loaded each night. The table
> needs to have an index added for reporting purposes. However, when I
> add the index to the table in the TEST database I start getting Snapshot
> Too Old errors. I added 25% more
I asked this last week, but I have a little more info this week.
I have a table that gets programmatically loaded each night. The table
needs to have an index added for reporting purposes. However, when I
add the index to the table in the TEST database I start getting Snapshot
Too Old errors
-01555 Snapshot too old
Help!
I
have a production and a test database, both with 3000mg RBS tablespaces with
two datafiles. Both have db_block_buffers set at 1000. The only
difference is the production db has 7 rollback segments and the test
db has 8. The rollback segments are
Ron - I think you are feeling that one system is good and the other is bad.
My suggestion is to consider one system at the ragged edge of failing and
the other system over the edge and in the ditch. Next week with a different
set of data, they may both well fail or both succeed. With ORA-01555 erro
Snapshot too old also occurs when there is a commit across an open cursor.
Keep the commit on the outermost cursor in your PL/SQL (if you are using
PL/SQL) IN other words committing on the inside of a cursor FOR loop can
cause the cursor snapshot to be overwritten in rollback by activity on the
They are both processing the same data, the same way.
-Original Message-
Sent: Tuesday, July 22, 2003 10:15 AM
To: Multiple recipients of list ORACLE-L
Ron
I'm guessing that one of the loads receives the ORA-01555 and the
other doesn't. Does the load commit occasionally? There are so
Ron,
Are the sizes of the data manipulated by the batch load the same?
Is the db_block_size the same on each database?
What is the size of the rbs during processing? What is the hwmsize, shrinks,
extends from v$rollstat?
You may be encountering a situation where the
Ron
I'm guessing that one of the loads receives the ORA-01555 and the other
doesn't. Does the load commit occasionally? There are some pretty good
papers on Metalink for this error.
Dennis Williams
DBA, 80%OCP, 100% DBA
Lifetouch, Inc.
[EMAIL PROTECTED]
-Original Message-
Sent:
Title: Message
Help!
I have
a production and a test database, both with 3000mg RBS tablespaces with two
datafiles. Both have db_block_buffers set at 1000. The only
difference is the production db has 7 rollback segments and the test
db has 8. The rollback segments are sized at 50mg each
create the indexes based on the data in the stage tablespace
or, we do
insert select
Commit;
update
commit;
delete
commit;
The snapshot too old is occurring during the process of create table as, all the data is getting created in the new table, then Im getting a snapshot too old. I didnt have error
nope. My process is rather simple.
A flag comes in... either we do a create table as, drop the old table, and create the
indexes based on the data in the stage tablespace
or, we do
insert select
Commit;
update
commit;
delete
commit;
The snapshot too old is occuring during the process of
that is using that rollback
segment for a consistent view of the database. If the rollback segment
shrinks, the query cannot find the data that it needs. This results in
a snapshot too old error.
To: Multiple
recipients of list ORACLE-L <[EM
; From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> Sent: 05 June 2003 18:40
> To: Multiple recipients of list ORACLE-L
> Subject: Re: Re: Snapshot too old during stress test... how to avoid
>
>
> nope. My process is rather simple.
>
> A flag comes in... either we do a cr
ts optimal size as soon
as the update, insert, or delete transaction is committed. However, there
may be a long running query that is using that rollback segment for a
consistent view of the database. If the rollback segment shrinks, the
query cannot find the data that it needs. This results in a sn
Are you hitting ORA-1555 because of a fetch across commit?
[EMAIL PROTECTED] wrote:
why would removing optimal setting help with snapshot too old?
what I dont understand is that each of my DML transactions are independent of each other. They query and perform DML on different tables
2003/06/05 Thu AM 10:09:52 EDT
> To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
> Subject: RE: Re: Snapshot too old during stress test... how to avoid
>
> Snapshot Too Old Maybe caused bcos of Delayed Block Cleanout Problems.
> Now this Bock was updated an Hour ago and
Snapshot Too Old Maybe caused bcos of Delayed Block Cleanout Problems.
Now this Bock was updated an Hour ago and u are now selecting it.. It
finds that there are ITL Entries in there and oracle wants to see if the
Transaction has been commited.
He Goes back to the Transaction Table of the RBS
and Im not updating the data dictionary.
>
> From: "Ganesh Raja" <[EMAIL PROTECTED]>
> Date: 2003/06/05 Thu AM 10:09:52 EDT
> To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
> Subject: RE: Re: Snapshot too old during stress test... how to avoid
>
cannot find the data that it needs. This results in a snapshot too
old error.
To: Multiple recipients of list
why would removing optimal setting help with snapshot too old?
what I dont understand is that each of my DML transactions are independent of each
other. They query and perform DML on different tables. None of them overlap. The only
time they overlap is when they hit the data dictionary for
gt;
>
>
> Kirtikumar Deshpande <[EMAIL PROTECTED]>
> Sent by: [EMAIL PROTECTED]
> 06/04/2003 09:45 AM
> Please respond to ORACLE-L
>
>
> To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
> cc:
> Subject:Re: Sn
Subject: Re: Snapshot too old during stress test... how to avoid
Try removing optimal setting, and shrinking RBS to the min extents (or
even below) before running
your tests.
- Kirti
--- Garry Gillies <[EMAIL PROTECTED]> wrote:
> From memory (of a course attended looon
Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
> cc:
> Subject:Snapshot too old during stress test... how to avoid
>
>
> Im testing worst case scenarios right now. So Im doing batch
> updates,inserts,deletes and 'create table as' fro
ORACLE-L
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
cc:
Subject: Snapshot too old during stress test... how to avoid
Im testing worst case scenarios right now. So Im doing batch
updates,inserts,deletes and 'create table as'
ground
in order to gather statistics and timing under worst case scenarios.
Im in 8.1.7.3 and I have increased the size of my RBS tablespace to 11GB for this
test. I have 4 standard RBS with optimal size set to 1GB. Why would I get a snapshot
too old? I would think that 11GBs of rollback would be
BA's makes his living in their
employment as Oracle DBA.
-Original Message-From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]Sent: Friday, March 28, 2003 12:19
PMTo: Multiple recipients of list ORACLE-LSubject:
snapshot too old
why a select statement can give snapshot too old
AK...
this happens with LONG queries too...
this means that you do not have enough rollback
segments...
or...
that they are very small...
HTH
JL
--- AK <[EMAIL PROTECTED]> wrote:
> why a select statement can give snapshot too old
> erorr .
> there is no update , yes but its
003 12:19 PM
To: Multiple recipients of list ORACLE-L
why a select statement can give snapshot too old erorr .
there is no update , yes but its a long running query .
what is fix for this ?
-ak
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: DENNIS WILLIAMS
INET:
why a select statement can give snapshot too old
erorr .
there is no update , yes but its a long running
query .
what is fix for this ?
-ak
y in the export. The database is trying to give you data as of
the time you started the export. The fact that you are getting the snapshot
too old message is evidence that the data is changing while you are
exporting -- to the extent that the database is eventually unable to keep
doing it -- but
t backup a database with the
export utility. I suspect you get your error because you are using
consistent=y in the export. The database is trying to give you data as of
the time you started the export. The fact that you are getting the snapshot
too old message is evidence that the data is chan
I'm certainly not an Oracle internals expert. My understanding of ANY
consistent set of data is provided by the rollback segments. It goes
something like this:
A select is run
The database notes the SCN where the select started
Consistent data is given to the query by pulling data from the tabl
I suspect you get your error because you are using
consistent=y in the export. The database is trying to give you data as of
the time you started the export. The fact that you are getting the snapshot
too old message is evidence that the data is changing while you are
exporting -- to the exten
without 1555 risk). Yes, this is 100Gb of rollback:-)
/Bjørn.
Jackson Dumas wrote:
Hi all
I have a problem when doing an export in one of ourt production
databases. The export fails with ORA-01555, snapshot too old error.
I have increased the number of rollback segments and their sizes on
the
I would echo a previous post that you can't backup a database with the
export utility. I suspect you get your error because you are using
consistent=y in the export. The database is trying to give you data as of
the time you started the export. The fact that you are getting the snapsho
is running. To really understand the issue go to
http://www.ixora.com.au and look at Steve Adams' material on snapshot
too old.
Allan
-Original Message-
Sent: Friday, February 21, 2003 4:00 AM
To: Multiple recipients of list ORACLE-L
Hi all
I have a problem when doing an export i
ng an export in one of ourt production
databases. The export fails with ORA-01555, snapshot too old error.
I have increased the number of rollback segments and their sizes on
the database. Also I have went to an extent of specifying the
parameter constent=n on my script but backups fails. The worst pa
Hi all
I have a problem when doing an export in one of ourt production
databases. The export fails with ORA-01555, snapshot too old error.
I have increased the number of rollback segments and their sizes on
the database. Also I have went to an extent of specifying the
parameter constent=n on my
ch written in PL/SQL
(millions of lines of code split over 7 batches)
When the job is running, certain batches stop with ORA-1555 : Snapshot
too
old. Other batches run well till the end.
Bizarre is that not always the same job stops.
When I do a trace I see nothing. With a normal trace I
e job is running, certain batches stop with ORA-1555 : Snapshot
too
old. Other batches run well till the end.
Bizarre is that not always the same job stops.
When I do a trace I see nothing. With a normal trace I am pretty sure
that I
will never see it.
Rollback segments are rarely used. So ma
code split over 7 batches)
When the job is running, certain batches stop with ORA-1555 : Snapshot
too
old. Other batches run well till the end.
Bizarre is that not always the same job stops.
When I do a trace I see nothing. With a normal trace I am pretty sure
that I
will never see it.
,
Since a few weeks I am tuning a big conversion batch written in PL/SQL
(millions of lines of code split over 7 batches)
When the job is running, certain batches stop with ORA-1555 : Snapshot too
old. Other batches run well till the end.
Bizarre is that not always the same job stops
Dear,
Since a few weeks I am tuning a big conversion batch written
in PL/SQL (millions of lines of code split over 7 batches)
When the job is running, certain batches stop with ORA-1555 : Snapshot too old. Other batches run well till
the end.
Bizarre is that not always the same
> I meant , no one runs a DML against those tables during
> the running of the program.
Right. If there is no DML while your program is running, then the snapshot
error is due to DML that was run earlier. The solution is simple.
In the programs that do large batch inserts or updates on these t
On Mon, 27 May 2002, Nirmal Kumar Muthu Kumaran wrote:
> Increase rollback segment size for this transaction and make sure
> that the transaction will use the huge rollback segment
I don't think that solution is correct. This is a common
misconception about "snapshot too old.&
How about DML before (ie before your query starts)?
If there are massive amount of blocks to be cleaned
out, this can lead to ora-1555
hth
connor
--- Andrey Bronfin <[EMAIL PROTECTED]> wrote:
> I meant , no one runs a DML against those tables
> during the running of the
> program.
>
>
> DBAn
agains A or B .
AB> But occasionally i get the Ora-1555 - "snapshot too old" error during
the
AB> run of the aforementioned program.
AB> Any ideas , please ?
AB> TIA
AB> DBAndrey
AB> * 03-9254520
AB> * 058-548133
AB> * mailto:[EMAIL PROTECTED]
--
Best
Greg Moore wrote:
>
> > 2 huge tables A and B
>
> > Now , NO ONE carries a DML agains A or B.
>
> If no one ever does DML against those two tables, how did they end up having
> so many rows?
>
> Do you run large batch update or insert operations against these tables from
> time to time?
>
On
> 2 huge tables A and B
> Now , NO ONE carries a DML agains A or B.
If no one ever does DML against those two tables, how did they end up having
so many rows?
Do you run large batch update or insert operations against these tables from
time to time?
--
Please see the official ORACLE-L FAQ: h
-01555 messages (followed by a ORA-22924), on tables
with LOBs ...
HTH, Remco
-Oorspronkelijk bericht-
Van: Andrey Bronfin [mailto:[EMAIL PROTECTED]]
Verzonden: maandag 27 mei 2002 14:53
Aan: Multiple recipients of list ORACLE-L
Onderwerp: "snapshot too old" error - strange
Onderwerp: "snapshot too old" error - strange
Dear list !
There is something strange going on in my production DB.
There is a program that reads fom 2 huge tables (A and B - select only)
and
writes a fraction of records into some third table (let's call it C -
inserts only).
Now , NO ON
Aan: Multiple recipients of list ORACLE-L
Onderwerp: "snapshot too old" error - strange
Dear list !
There is something strange going on in my production DB.
There is a program that reads fom 2 huge tables (A and B - select only)
and
writes a fraction of records into some third table (
Title: RE: "snapshot too old" error - strange
Increase rollback segment size for this transaction and make sure that the
transaction will use the huge rollback segment
hth
nirmal
-Original Message-
From: Andrey Bronfin [SMTP:[EMAIL PROTECTED]]
Sent: Mon, May 27,
i get the Ora-1555 - "snapshot too old" error during the
run of the aforementioned program.
Any ideas , please ?
TIA
DBAndrey
* 03-9254520
* 058-548133
* mailto:[EMAIL PROTECTED]
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Andrey Bronfin
INET: [EMAIL
ursday, January 17, 2002 6:25 AM
To: Multiple recipients of list ORACLE-L
Seema Singh wrote:
>
> Hi
> At time of export i am getting following error
> "EXP-8: ORACLE error 1555 encountered
> ORA-01555: snapshot too old: rollback segment number 6 with name "R03&qu
phane...
You're mean...
:-)
-Original Message-
Sent: Thursday, January 17, 2002 6:25 AM
To: Multiple recipients of list ORACLE-L
Seema Singh wrote:
>
> Hi
> At time of export i am getting following error
> "EXP-8: ORACLE error 1555 encountered
> ORA-01555: snap
r
> "EXP-8: ORACLE error 1555 encountered
> ORA-01555: snapshot too old: rollback segment number 6 with name "R03" too
> small"
>
> Please suggest
> Thanks
> -Seema
Mladen, any idea ?
--
Regards,
Stephane Faroult
Oriole Ltd
--
Please see the official O
Stephane...
You're mean...
:-)
-Original Message-
Sent: Thursday, January 17, 2002 6:25 AM
To: Multiple recipients of list ORACLE-L
Seema Singh wrote:
>
> Hi
> At time of export i am getting following error
> "EXP-8: ORACLE error 1555 encountered
> OR
Seema Singh wrote:
>
> Hi
> At time of export i am getting following error
> "EXP-8: ORACLE error 1555 encountered
> ORA-01555: snapshot too old: rollback segment number 6 with name "R03" too
> small"
>
> Please suggest
> Thanks
> -Seema
Seema,
The "ORA-1555 snapshot too old" occurs when export tries to construct a read
consistent view of your data from rollback segments, which has been
overwritten or reused for new transactions.
Other sessions are updating data while the export is running in consistent
mode (using
- Original Message -
To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]>
Sent: Wednesday, January 16, 2002 23:55
>
> Hi
> At time of export i am getting following error
> "EXP-8: ORACLE error 1555 encountered
> ORA-01555: snapshot too
Hi
At time of export i am getting following error
"EXP-8: ORACLE error 1555 encountered
ORA-01555: snapshot too old: rollback segment number 6 with name "R03" too
small"
Please suggest
Thanks
-Seema
___
correctly)
> >
> > Yechiel Adar, Mehish Computer Services
> > [EMAIL PROTECTED]
> >
> > > -----Original Message-
> > > From: Karniotis, Stephen
> [SMTP:[EMAIL PROTECTED]]
> > > Sent: Tue, January 15, 2002 8:05 PM
> > &
s
> [EMAIL PROTECTED]
>
> > -Original Message-
> > From: Karniotis, Stephen [SMTP:[EMAIL PROTECTED]]
> > Sent: Tue, January 15, 2002 8:05 PM
> > To: Multiple recipients of list ORACLE-L
> > Subject:RE: ORA-01555: snapshot too old: rollback
5 PM
> > To: Multiple recipients of list ORACLE-L
> > Subject:RE: ORA-01555: snapshot too old: rollback segment
> number...
> >
> > You can export with CONSISTENT=N; a consistent view of the data
> will not
> > be
> > achieved. You can also increase
; -Original Message-
> Sent: Tuesday, January 15, 2002 12:20 PM
> To: Multiple recipients of list ORACLE-L
> Subject: ORA-01555: snapshot too old: rollback segment number...
>
> Hi all,
>
> Last nignt when we were expring data for one of our
> databases,
Technical Alliance Manager
Compuware Corporation
Direct: (248) 865-4350
Mobile: (248) 408-2918
Email: [EMAIL PROTECTED]
Web:www.compuware.com
-Original Message-
Sent: Tuesday, January 15, 2002 12:20 PM
To: Multiple recipients of list ORACLE-L
Subject:ORA-01555: snapshot too old
Subject:ORA-01555: snapshot too old: rollback segment number...
Hi all,
Last nignt when we were expring data for one of our
databases, this error ocurred:
ORA-01555: snapshot too old: rollback segment number
3 with name "R02") offset=(0).
Now, we were able to once again expor
Hi all,
Last nignt when we were expring data for one of our
databases, this error ocurred:
ORA-01555: snapshot too old: rollback segment number
3 with name "R02") offset=(0).
Now, we were able to once again export and load data
this morning. And there was no error.
What is the best
:11 PM
> To: Baker, Barbara
> Subject: RE: ORA-01555 Snapshot Too Old
>
> Hi Barb,
>
> You should either have all other rollback segments offline, or put an
> uncommitted transaction in each online rollback segment.
>
> @ Regards,
> @ Steve Adams
> @ http://www
PROTECTED]
-Original Message-
Sent: Thursday, October 18, 2001 4:05 PM
To: Multiple recipients of list ORACLE-L
The same weekly job has been blowing up with "snapshot too old" for the last
year. After having been awakened (again) at 3:00 am, I'm a desperate woman.
Any ideas w
The same weekly job has been blowing up with "snapshot too old" for the last
year. After having been awakened (again) at 3:00 am, I'm a desperate woman.
Any ideas would be greatly appreciated.
We get the ORA-1555 error every time we run this job. We get this error if
the
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