Oracle error: Ora-01555 : snapshot too old: rollback segment number 1......

System Error: Unknown Database error (type qqdb_ResourceException) on WMS_WH1: Execute failed for SQL statement ............... error from database is: ORA-01555: snapshot too old: rollback segment number 1 with name "_SYSSMU1$" too small...
Any ideas ? Please help.
Thank you.

You either have
- an UNDO tablespace that is way too small (rollback segments that are too small); or
- an application that does way too many COMMITs (common with apps ported from SQL Server)
From the added info, I would guess that the Java program has a major loop and does processing on each of the values it gets in that loop. At the end of each turn in the loop, it does a commit. Then it tries to look at the next record in the master list. After a while (say around 388 loops ;-) ) it dies.
The reason is that when it looks for information in the master query, it needs to rebuild that information to the moment that query was initiated. It uses rollback (AKA undo) to rebuild that. But rollback is not guaranteed to exist after a commit (unless forced) and once a commit happens, that area can be reused. When it is reused, the information is no longer there to rebuild the row, and that raises an ORA-01555
Edited by: Hans Forbrich on Sep 11, 2009 3:44 PM

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Hi,
Can you increase the size of the UNDO Tablespace ?
For more information, you can find on this link below:
http://forums.oracle.com/forums/search.jspa?threadID=&q=ORA-01555&objID=c84&dateRange=all&userID=&numResults=15
Cheers

ORA-01555: snapshot too old: rollback segment number 8 with name

Hi,
Database version is Oracle8i Enterprise Edition Release 8.1.7.4.0
I am struggling to fix this error, since I have not worked on 8I DATABASE.
We getting this kind of error very frequently in one of the 8i database.
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How do i fix this permantely.
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SEGMENT_NAME TABLESPACE_NAME OWNER STATUS
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ROLLBACK03 RBS1 SYS ONLINE
ROLLBACK04 RBS1 SYS ONLINE
ROLLBACK05 RBS1 SYS ONLINE
ROLLBACK06 RBS1 SYS ONLINE
ROLLBACK07 RBS1 SYS ONLINE
ROLLBACK08 RBS1 SYS ONLINE
ROLLBACK09 RBS1 SYS ONLINE
ROLLBACK10 RBS1 SYS ONLINE
ROLLBACK01 RBS1 SYS ONLINE
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SYSTEM 7 770048 770048 0 ONLINE
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ROLLBACK04 3 62906368 262144000 62906368 0 ONLINE
ROLLBACK05 2 41934848 262144000 41934848 0 ONLINE
ROLLBACK06 3 62906368 262144000 62906368 1 ONLINE
ROLLBACK07 3 62906368 262144000 62906368 1 ONLINE
ROLLBACK08 3 62906368 300146688 62906368 0 ONLINE
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ROLLBACK10 3 62906368 262144000 62906368 1 ONLINE
ROLLBACK01 3 62906368 300146688 62906368 0 ONLINE
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ROLLBACK01          62906368     19     3     0 300146688 lookup
ROLLBACK02          41934848     0     2     0 262144000 lookup
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ROLLBACK04          62906368     34     3     0 262144000 lookup
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ROLLBACK06 OPS$RTRADM     62906368     21     3     0 262144000 lookup 50
ROLLBACK07 OPS$RTRADM     62906368     25     3     0 262144000 lookup 50
ROLLBACK08          62906368     32     3     0 300146688 lookup
ROLLBACK09 OPS$RTRADM     62906368     20     3     0 262144000 Select
ROLLBACK10 OPS$RTRADM     62906368     24     3     0 262144000 lookup 50
SYSTEM               770048     0     7     0     lookup
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lm**** wrote:
Hi,
Database version is Oracle8i Enterprise Edition Release 8.1.7.4.0
I am struggling to fix this error, since I have not worked on 8I DATABASE.
We getting this kind of error very frequently in one of the 8i database.
ORA-01555: snapshot too old: rollback segment number 8 with name "ROLLBACK08" too small
How do i fix this permantely. upgrade to supported Oracle version since V8.1.7 has not been supported this Century.

ORA-01555: snapshot too old: rollback segment number

I getting error while i am taking export one of the table.
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1) What version of Oracle?
2) Is UNDO_MANAGEMENT set to AUTO? Or are you still using manual undo management?
3) What is your UNDO_RETENTION? How quickly are you generating UNDO? How big is your UNDO tablespace?
4) How long does the export run?
5) Did you specify CONSISTENT=Y in the export? If so, is that necessary?
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Request got errror as ORA-01555: snapshot too old: rollback segment number

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ORA-01555: snapshot too old: rollback segment number 3 with name "RB02

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01555, 00000, "snapshot too old: rollback segment number %s with name \"%s\" too small"
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Urgent: Error ORA-01555 "snapshot too old rollback segment too small"

I get this error when I do a "SELECT" on a few very large tables for a report. Isn't there a way out? Our DBA says our rollback segment size cannot be increased anymore. All I care of is the SELECT statement to finish executing. It is okay for me to have some inconsistency in the data (dirty reads). What is the easiest way to solve this problem? I CANNOT breakup the SELECT statement into multiple statements.
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Oracle cannot be configured to give you dirty reads.
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Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

ORA-01555: snapshot too old: rollback segment number with name "" too smal

Hi,
I'm working on Oracle Database 11g Release 11.1.0.6.0 - 64bit Production With the Real Application Clusters option.
I'm exepriencing the error in the subject executing a procedure.
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What's then the logic why the commit is causing it?When you commit a transaction, involved undo blocks are "released", and they might be overwritten : if those blocks are needed for consistency, then you get ORA-01555 error.

ORA-01555: snapshot too old: rollback segment number 6 with name "R05" too

Can someone please help me how to overcome this dreaded ORA-01555 and how to know what exactly is causing this. There can be number of reasons this can occur :
1. Fewer and smaller rollback segments for a very actively changing database
2. Corrupted rollback segment
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http://asktom.oracle.com/pls/ask/f?p=4950:8:802460143396322798::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:275215756923
<quote source="asktom">
the only CAUSE of a 1555 is improperly sized rollback segments.
</quote>
http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:275215756923#10100046218454
Message was edited by:
Kamal Kishore

Ora-01555, snapshot too old: rollback segment number 2 with name "_SYSSMU1

Hi,
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Hi,
I got the same error twice since 2 weeks.
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ORA-01555 Snapshot too old, rollback segment too small after flashback tab

Hello
Further to an update on a table in database, I realize that I have done an error and I want to come back in the state of table before this operation.
For this I use 'Flashback table' as this command :
flashback table 'table_name' to timestamp to_timestamp('2010-11-08 08:00:00 AM','YYYY-MM-DD HH:MI:SS PM')
and I get this error :
ORA-01555 :Snapshot Too Old rollback segment N° x , "_SYSSMU9$", too small
What I can do to not have this problem ? can I avoid it ?
Please helps .
Regards
Edited by: 794982 on 12 nov. 2010 05:05
Edited by: 794982 on 12 nov. 2010 05:05
Edited by: 794982 on 12 nov. 2010 05:06

To set the undo retention period:
Do one of the following:
• Set UNDO_RETENTION in the initialization parameter file.
UNDO_RETENTION = 1800
• Change UNDO_RETENTION at any time using the ALTER SYSTEM statement:
ALTER SYSTEM SET UNDO_RETENTION = 2400;
The effect of an UNDO_RETENTION parameter change is immediate, but it can only be honored if the current undo tablespace has enough space.
For more reference.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/undo.htm

ORA-01555: snapshot too old: rollback segment.... - Urgent Help required

Hello all,
I am getting this error and what I understood is I either need a bigger UNDO segment or need to increase the value of UNDO_RETENTION.
What I want to know before doing any of this is, whether I can increase the value in the UNDO_RETENTION dynamically?
Other than this I also would like to know to if there is any other way to tackle and resolve this issue?
Your help is very much appriciated.
Thanks in advance.
Himanshu

Hi,
both parameter should be tune for eliminate this error.
undo tablespace size should be large enough and retention value should at least the
length of longest query.find it from following sql.
select max(maxquerylen) from v$undostat;
Thanks
Kuljeet

Receiving error ORA-01555: snapshot too old:

Need some info...
Currently seeing ORA-01555: snapshot too old: rollback segment number 18 with name "_SYSSMU18$" too small.
Info:
SQL> show parameter undo
NAME TYPE VALUE
undo_management string AUTO
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undo_suppress_errors boolean FALSE
undo_tablespace string UNDOTBS_1
SQL> select max(maxquerylen) from v$undostat;
MAX(MAXQUERYLEN)
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SQL>
run this based on threads in here:
SQL> select (35792/60)/60 query,(4200/60)/60 retention from dual;
QUERY RETENTION
9.94222222 1.16666667
I need some help figuring out what to set my undo_retention to? Should it be 36000?
Any help is appreciated.
Thanks

Jamie CC wrote:
The query that was in the alert log was running against a table with 779 rows. The query uses the index (not worried if it wouldn't for that small a table) and came back in one second... This makes no sense. Is it possible that there was a sub-query running and the wrong query was put into the alert log?More likely the query in the alert log was one that died, but the cause was a different query. Remember, the meaning of an ORA-1555 is that the query needed to go back to undo in order to gather a view of the data to a certain SCN, and the data had already been aged out. So the alert log gets the one that died, but the cause is another one. Feel lucky at that, in older versions it was considered an app error IIRC.
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Error message: snapshot too old: rollback segment number( very urgent)

Hi everybody,
I have a question regarding an oracle error message <b>snapshot too old: rollback segment number</b>.
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it´s very uncommon to have an Oracle version higher than the client versions of the tools.
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UNdo error (ora-01555) - Snapshot too old error

Hi,
If undo get filled and if we get a snapshot too old error then what is the solution for this error, plz give step by step solution for this.

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Oracle error: Ora-01555 : snapshot too old: rollback segment number 1......

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