ORA-01534: Rollback Segment "R1" doesn't exist

Hello:
null

Check your init<SID>.ora file. Check the parameter
rollback_segments. If its value contains R01, delete R01. After
that, save the file and startup again.
Robert Xu
Laurie (guest) wrote:
: Greetings
: HELP!! We are using oracle 8.0.5 ...
: The database will not open because it says the system
: rollback segment does not exist.
: The database mounts but won't open. from the file system
checks,
: the dbf file that contains the system rollback segment appears
to
: be fine.
: Is there anyway to recreate the sys rb seg ? any way to
correct
: whatever is causing it to think it doesn't exist?
: or if it is just hosed, is there any way to retrieve the data
in
: the data dbf files through another oracle installation or
another
: oracle database??
: Thanks for any input!
null

Similar Messages

ORA-01534 rollback segment 'R1' does not exist

Greetings
HELP!! We are using oracle 8.0.5 ...
The database will not open because it says the system
rollback segment does not exist.
The database mounts but won't open. from the file system checks,
the dbf file that contains the system rollback segment appears to
be fine.
Is there anyway to recreate the sys rb seg ? any way to correct
whatever is causing it to think it doesn't exist?
or if it is just hosed, is there any way to retrieve the data in
the data dbf files through another oracle installation or another
oracle database??
Thanks for any input!
null

Check your init<SID>.ora file. Check the parameter
rollback_segments. If its value contains R01, delete R01. After
that, save the file and startup again.
Robert Xu
Laurie (guest) wrote:
: Greetings
: HELP!! We are using oracle 8.0.5 ...
: The database will not open because it says the system
: rollback segment does not exist.
: The database mounts but won't open. from the file system
checks,
: the dbf file that contains the system rollback segment appears
to
: be fine.
: Is there anyway to recreate the sys rb seg ? any way to
correct
: whatever is causing it to think it doesn't exist?
: or if it is just hosed, is there any way to retrieve the data
in
: the data dbf files through another oracle installation or
another
: oracle database??
: Thanks for any input!
null

ORA-01041: internal error. hostdef doesn't exist

Linux Advanced Server + Oracle 9.2.0.1.0
Trying to sqlplus
conn / as sysdba
Error
ORA-01041: internal error. hostdef doesn't exist
What does it mean ? what I should do to be able to connect to the database.
TNSNAMES.ora seems fine
Linstener is up and running
Any ideas? Thanks

you might be installing the Softawre across the network and
after some time your connection get disconnected.
or you checkout the resouresc if you are doing in the server
putting cd on the server.

ORA-01545: rollback segment 'R01' specified not available, after disk crash

After a disk problem, when I try to open the database I receive the error 0ra-01545.What can I do resolve this? It seems that the rollback segment is marked for recover. I an only mount the database.

This is the forms forum. If you ask your question the the database forum you may get an answer much quicker.

ORA-01545: rollback segment 'R01' specified not available

After a disk crash , I can't open the database. I can only mount it, because of the erro ora-01545. What can I do to resolve this? When I saw the v$datafile that was marked for recover. Someone could help me?

I got these errors when recovering the datafile of RBS tablespace.
RA-00283: recovery session canceled due to errors
ORA-01115: IO error reading block from file 3 (block # 24919)
ORA-01110: data file 3: '/OpenFlexIS/database/dbf/system1/dfRbs01.dbf'
ORA-27072: skgfdisp: I/O error
IBM AIX RISC System/6000 Error: 5: I/O error
But this database is production database. I have tried to open database with comment in rbs line, but these errors occurs:
SMON: enabling cache recovery
Sun May 27 21:17:54 2007
ARC0: Beginning to archive log# 20 seq# 19144
ARC0: Completed archiving log# 20 seq# 19144
Sun May 27 21:17:54 2007
SMON: enabling tx recovery
SMON: about to recover undo segment 1
SMON: mark undo segment 1 as needs recovery
SMON: about to recover undo segment 2
SMON: mark undo segment 2 as needs recovery
SMON: about to recover undo segment 3
SMON: mark undo segment 3 as needs recovery
SMON: about to recover undo segment 4
SMON: mark undo segment 4 as needs recovery
SMON: about to recover undo segment 5
SMON: mark undo segment 5 as needs recovery
SMON: about to recover undo segment 6
SMON: mark undo segment 6 as needs recovery
SMON: about to recover undo segment 7
SMON: mark undo segment 7 as needs recovery
SMON: about to recover undo segment 8
SMON: mark undo segment 8 as needs recovery
SMON: about to recover undo segment 9
SMON: mark undo segment 9 as needs recovery
SMON: about to recover undo segment 10
SMON: mark undo segment 10 as needs recovery
Sun May 27 21:17:56 2007
Errors in file /oradump/OPENFLEX/udump/ora_39216_openflex.trc:
ORA-00604: error occurred at recursive SQL level 1
ORA-00376: file 3 cannot be read at this time
ORA-01110: data file 3: '/OpenFlexIS/database/dbf/system1/dfRbs01.dbf'
Sun May 27 21:17:56 2007

Cannot use system rollback segment for non-system tablespace 'TEMP

Hi everyone!
I encountered this error: "Cannot use system rollback segment for non-system tablespace 'TEMP"
So this is what I did to check if the undo stuffs are online.
SQL> select tablespace_name,status from dba_tablespaces;
TABLESPACE_NAME                STATUS
SYSTEM                         ONLINE
UNDO                           ONLINE
SYSAUX                         ONLINE
TEMP                           ONLINE
LARGEDATA                      ONLINE
LARGEINDEXES                   ONLINE
MEDIUMDATA                     ONLINE
MEDIUMINDEXES                  ONLINE
SMALLDATA                      ONLINE
SMALLINDEXES                   ONLINE
XSMALLDATA                     ONLINE
TABLESPACE_NAME                STATUS
XSMALLINDEXES                  ONLINE
XXSMALLTABS                    ONLINE
USERS                          ONLINE
CONVTABLES                     ONLINE
UNDO_02                        ONLINE
16 rows selected.
SQL> SELECT tablespace_name, sum((bytes/1024)/1024) free FROM DBA_FREE_SPACE gr
oup by tablespace_name;
TABLESPACE_NAME                      FREE
LARGEDATA                      18.3105469
SMALLDATA                        10.46875
SYSAUX                           106.5625
UNDO_02                            67.125
XXSMALLTABS                    13.0078125
CONVTABLES                     170.039063
MEDIUMDATA                             22
USERS                           37.265625
SYSTEM                             55.875
LARGEINDEXES                   30.5175781
XSMALLINDEXES                    17.34375
TABLESPACE_NAME                      FREE
UNDO                             546.9375
MEDIUMINDEXES                       33.25
SMALLINDEXES                    31.015625
XSMALLDATA                     23.6328125
15 rows selected.
SQL> select file#,status from v$datafile;
     FILE# STATUS
         1 SYSTEM
         2 ONLINE
         3 ONLINE
         4 ONLINE
         5 ONLINE
         6 ONLINE
         7 ONLINE
         8 ONLINE
         9 ONLINE
        10 ONLINE
        11 ONLINE
     FILE# STATUS
        12 ONLINE
        13 ONLINE
        14 ONLINE
        15 ONLINE
15 rows selected.
SQL> select segment_name, tablespace_name, initial_extent,status
2 from dba_rollback_segs;
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
SYSTEM                         SYSTEM                                 102400
ONLINE
_SYSSMU1$                      UNDO                                   131072
OFFLINE
_SYSSMU2$                      UNDO                                   131072
OFFLINE
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
_SYSSMU3$                      UNDO                                   131072
OFFLINE
_SYSSMU4$                      UNDO                                   131072
OFFLINE
_SYSSMU5$                      UNDO                                   131072
OFFLINE
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
_SYSSMU6$                      UNDO                                   131072
OFFLINE
_SYSSMU7$                      UNDO                                   131072
OFFLINE
_SYSSMU8$                      UNDO                                   131072
OFFLINE
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
_SYSSMU9$                      UNDO                                   131072
OFFLINE
_SYSSMU10$                     UNDO                                   131072
OFFLINE
_SYSSMU11$                     UNDO_02                                131072
OFFLINE
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
_SYSSMU12$                     UNDO_02                                131072
OFFLINE
_SYSSMU13$                     UNDO_02                                131072
OFFLINE
_SYSSMU14$                     UNDO_02                                131072
OFFLINE
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
_SYSSMU15$                     UNDO_02                                131072
OFFLINE
_SYSSMU16$                     UNDO_02                                131072
OFFLINE
_SYSSMU17$                     UNDO_02                                131072
OFFLINE
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
_SYSSMU18$                     UNDO_02                                131072
OFFLINE
_SYSSMU19$                     UNDO_02                                131072
OFFLINE
_SYSSMU20$                     UNDO_02                                131072
OFFLINE
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
_SYSSMU21$                     UNDO_02                                131072
OFFLINE
22 rows selected.How should I be bringing them online?
I tried this but didn't work for me.
SQL> alter rollback segment _SYSSMU1$ online;
alter rollback segment _SYSSMU1$ online
ERROR at line 1:
ORA-00911: invalid character
SQL> alter rollback segment '_SYSSMU1$' online;
alter rollback segment '_SYSSMU1$' online
ERROR at line 1:
ORA-02245: invalid ROLLBACK SEGMENT name
SQL> alter rollback segment _SYSSMU21$ online;
alter rollback segment _SYSSMU21$ online
ERROR at line 1:
ORA-00911: invalid character
SQL> alter rollback segment SYSSMU21$ online;
alter rollback segment SYSSMU21$ online
ERROR at line 1:
ORA-01534: rollback segment 'SYSSMU21$' doesn't exist
SQL> alter rollback segment '_SYSSMU21$' online;
alter rollback segment '_SYSSMU21$' online
ERROR at line 1:
ORA-02245: invalid ROLLBACK SEGMENT name
SQL> alter rollback segment "_SYSSMU21$" online;
alter rollback segment "_SYSSMU21$" online
ERROR at line 1:
ORA-30017: segment '_SYSSMU21$' is not supported in MANUAL Undo Management mode
SQL> ALTER SYSTEM SET UNDO_MANAGEMENT=AUTO SCOPE=SPFILE;
System altered.Should I be bringing every segment online separately? Please guide me.
Nith
Edited by: user645399 on Feb 23, 2011 2:52 PM

SQL> select segment_name, tablespace_name, initial_extent,status
2 from dba_rollback_segs;
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
SYSTEM                         SYSTEM                                 102400
ONLINE
_SYSSMU1$                      UNDO                                   131072
ONLINE
_SYSSMU2$                      UNDO                                   131072
ONLINE
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
_SYSSMU3$                      UNDO                                   131072
ONLINE
_SYSSMU4$                      UNDO                                   131072
ONLINE
_SYSSMU5$                      UNDO                                   131072
ONLINE
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
_SYSSMU6$                      UNDO                                   131072
ONLINE
_SYSSMU7$                      UNDO                                   131072
ONLINE
_SYSSMU8$                      UNDO                                   131072
ONLINE
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
_SYSSMU9$                      UNDO                                   131072
ONLINE
_SYSSMU10$                     UNDO                                   131072
ONLINE
_SYSSMU11$                     UNDO_02                                131072
OFFLINE
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
_SYSSMU12$                     UNDO_02                                131072
OFFLINE
_SYSSMU13$                     UNDO_02                                131072
OFFLINE
_SYSSMU14$                     UNDO_02                                131072
OFFLINE
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
_SYSSMU15$                     UNDO_02                                131072
OFFLINE
_SYSSMU16$                     UNDO_02                                131072
OFFLINE
_SYSSMU17$                     UNDO_02                                131072
OFFLINE
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
_SYSSMU18$                     UNDO_02                                131072
OFFLINE
_SYSSMU19$                     UNDO_02                                131072
OFFLINE
_SYSSMU20$                     UNDO_02                                131072
OFFLINE
SEGMENT_NAME                   TABLESPACE_NAME                INITIAL_EXTENT
STATUS
_SYSSMU21$                     UNDO_02                                131072
OFFLINEStill undo_02's segments are offline.

ORA-27101: shared memory realm does not exist Linux Error: 2: No such file

hello i have a 10 Database R1 installed on Redhat linux AS 4.
i'm having a problem connecting to my database, whenever i try to connect i get the error
ORA-01034: Oracle not available.
ORA-27101 shared memory realm does not exist
Linux Error: 2: No such file or directory.
i checked my startup.log and i found the following after issuing a dbstart.
ORACLE instance started.
Total System Global Area 130023424 bytes
Fixed Size          1218100 bytes
Variable Size          109054412 bytes
Database Buffers     16777216 bytes
Redo Buffers          2973696 bytes
Database mounted.
ORA-01092: ORACLE instance terminated
on dbshut i get the same error message in the shutdown.log
ORA-01034: Oracle not available.
ORA-27101 shared memory realm does not exist
Linux Error: 2: No such file or directory.
my alert_ASYDB.log file has the following
ORA-01534: rollback segment 'R01' doesn't exist
Tue Feb 27 23:14:19 2007
Error 1534 happened during db open, shutting down database
USER: terminating instance due to error 1534
Instance terminated by USER, pid = 3272
ORA-1092 signalled during: ALTER DATABASE OPEN...
in the database creation log, i noticed that this segment could not be created.
i can mount the databse but cannot open it
is there anyway to recreate these segments or any other solution for that?
i have tried to comment the line in initASYDB.ora but dd not work.
regards

Hi,
>>do you recommend using auto undo_management instead of RBS?
Yes. To simplify management of rollback segments, the Oracle9i database introduced Automatic Undo Management (AUM) where the database automatically manages allocation and management of undo (rollback) space among various active sessions. In a database using AUM, all transactions share a single undo tablespace. Any executing transaction can consume free space in this tablespace. Undo space is dynamically transferred from committed transactions to executing transactions in the event of space scarcity in the undo tablespace..The AUM feature also provides a way for administrators to exert control on undo retention. You can specify the amount of undo to be retained in terms of wall clock time (number of seconds). With retention control, you can configure your systems to allow long running queries to execute successfully without encountering ORA-1555 (Snapshot too old) errors ...
For more information, you can take a look on these links below:
http://www.oracle.com/technology/obe/obe10gdb/manage/undoadv/undoadv.htm
http://www.oracle-base.com/articles/9i/AutomaticUndoManagement.php
Cheers

Oracle not Available, Shared Memory realm doesn't exist

Hi,
I have problem during XE installation on Windows 2003 R2 SP 2 Enterprise edition. I have uninstall the oracle xe and the result still the same. Finally I uninstall the windows and start all over again, surprisingly the result still the same. FYI, we normally has no issue during installation because this is part of our system we sell to our customer which require oracle xe. This is the first time we have seen this issue.
ORA-01034 : Oracle Not available
ORA-27101 : Shared memory realm doesn't exist.
Oracle XE and listener services is started in the windows services.
if we try to do startup the following message occured.
SQL> connect /as sysdba
Connected to an idle instance.
SQL> startup
ORA-44412: XE edition memory parameter invalid or not specified
SQL>
I can send you the oracle_xe log, init ora, and OpsBuildAll.log to create the database.
When we compare with the working installation, we saw that the size of oraclexe folder is less, it's just 233MB while the working one is over 1GB. After investigation, found out that the .dbf files is not avaiable in the oradata folder, i have tried to copy those files from the working one but the problem stay the same, probably there are a lot of files more missing.
Appreciate your help on this.
Thanks,
Agus

Hi,
Please find the log below
SQL> startup nomount pfile="C:\oraclexe\app\oracle\product\10.2.0\server\config\scripts\init.ora";
ORA-44412: XE edition memory parameter invalid or not specified
SQL> @C:\oraclexe\app\oracle\product\10.2.0\server\config\scripts\rmanRestoreDatafiles.sql;
SQL> set echo off;
select TO_CHAR(systimestamp,'YYYYMMDD HH:MI:SS') from dual
ERROR at line 1:
ORA-01034: ORACLE not available
declare
ERROR at line 1:
ORA-01034: ORACLE not available
select TO_CHAR(systimestamp,'YYYYMMDD HH:MI:SS') from dual
ERROR at line 1:
ORA-01034: ORACLE not available
Connected to an idle instance.
SQL> spool C:\oraclexe\app\oracle\product\10.2.0\server\config\log\cloneDBCreation.log
I have css log as well if you are interesting to see.
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Tue Mar 20 14:13:29 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5308M/6133M, Ph+PgF:7152M/8000M, VA:1933M/2047M
Tue Mar 20 14:13:29 2012
Starting ORACLE instance (normal)
Tue Mar 20 14:13:30 2012
Starting ORACLE instance (normal)
Tue Mar 20 14:13:31 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Tue Mar 20 19:43:31 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5351M/6133M, Ph+PgF:7150M/8000M, VA:1932M/2047M
Tue Mar 20 19:43:31 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Tue Mar 20 19:55:39 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5254M/6133M, Ph+PgF:7052M/8000M, VA:1932M/2047M
Tue Mar 20 19:55:39 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Wed Mar 21 05:23:41 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5259M/6133M, Ph+PgF:6894M/8000M, VA:1932M/2047M
Wed Mar 21 05:23:41 2012
Starting ORACLE instance (normal)
Wed Mar 21 05:29:12 2012
Starting ORACLE instance (normal)
Wed Mar 21 05:31:42 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Wed Mar 21 05:50:45 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5143M/6133M, Ph+PgF:6768M/8000M, VA:1932M/2047M
Wed Mar 21 05:50:45 2012
Starting ORACLE instance (normal)
Wed Mar 21 06:02:38 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Wed Mar 21 06:04:03 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5205M/6133M, Ph+PgF:6866M/8000M, VA:1944M/2047M
Wed Mar 21 06:04:03 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Wed Mar 21 06:06:00 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5195M/6133M, Ph+PgF:6837M/8000M, VA:1944M/2047M
Wed Mar 21 06:06:00 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Wed Mar 21 06:06:11 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5195M/6133M, Ph+PgF:6836M/8000M, VA:1944M/2047M
Wed Mar 21 06:06:11 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Wed Mar 21 06:06:40 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5191M/6133M, Ph+PgF:6832M/8000M, VA:1944M/2047M
Wed Mar 21 06:06:40 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Wed Mar 21 06:07:18 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5191M/6133M, Ph+PgF:6831M/8000M, VA:1932M/2047M
Wed Mar 21 06:07:18 2012
Starting ORACLE instance (normal)
Wed Mar 21 06:07:38 2012
Shutting down instance (abort)
Wed Mar 21 06:07:51 2012
Starting ORACLE instance (normal)
Wed Mar 21 06:13:31 2012
Starting ORACLE instance (normal)
I have finished installing the XE on windows but result is the same, dbf file is not created on oradata folder.
Thanks,
Agus

Error while creating the rollback segment (Oracle 8i & OS Win NT)

hi
I am using Oracle 8i and when i am creating the new rollback segment for my database i have got following error message
ORA-01593 Rollback segment optimal size (30 blks) is smaller than the computed initial size (2560 blks)
CREATE ROLLBACK SEGMENT "RBS11" TABLESPACE "RBS1"
STORAGE ( INITIAL 120K NEXT
120K OPTIMAL
240K MINEXTENTS 2
MAXEXTENTS 100)
Note:- db_block size is 8k
Tablespace RBS1 is the Locally managed Tablespace having datafile of 50m and uniform size of 10m
But Given statement processed while i am using Tablespace RBS (winch is data dictionary managed)
Plz, suggest me to cause of that error and solution

You said 120K optimal and initial is 120K with minextents of 2. The optimal size then will be smaller than the initial allocation for the rbs.
ORA-01593: rollback segment optimal size (string blks) is smaller than the computed initial size (string blks)
Cause: Specified OPTIMAL size is smaller than the cumulative size of the initial extents during create rollback segment.
Action: Specify a larger OPTIMAL size.

ORA-01581: attempt to use rollback segment...

We've started getting "ORA-01581: attempt to use rollback segment (31) new extent (3) which is being allocated" messages in our production database over the last couple of days. Of course, each time we get these the rollback segment number is different, and we are getting these randomly from different applications that connect to the same database. We are using automatic undo management, so the rollback segments are not really under our control. The action in the Oracle docs for this error message doesn't give any specific actions that we should take, but we continue to get these.
We started to get these about the same time as we ran out of available sessions on the database (sessions = 1500 and we had 1500 open sessions). Could these be related? Could there be some open session that may be causing the rollback segment issue? Would a restart of the database fix this? Of course the max sessions issue was cleaned up two days ago but the rollback segment issue is a lingering problem.
Any help would be appreciated. We couldn't find anything for this online and Oracle hasn't responded to our service request yet.
Thanks,
Bobby

As I understand it, you can not explicitly set the size for the undo segments in automatic undo management mode. From the Concepts guide:
"In automatic undo management mode, the system controls exclusively the assignment of transactions to undo segments, and controls space allocation for undo segments."
It looks like we are also using the default storage options that are set when the UNDO tablespace was created. Here is the DDL used to create this tablespace:
CREATE SMALLFILE UNDO TABLESPACE "UNDOTBS" DATAFILE '/alpha/oradata/prod01/undotbs01.dbf' SIZE 750M REUSE AUTOEXTEND ON NEXT 25600K MAXSIZE 2000M , '/alpha/oradata/prod01/undotbs03.dbf' SIZE 2000M REUSE AUTOEXTEND ON NEXT 51200K MAXSIZE 2000M , '/alpha/oradata/prod01/undotbs04.dbf' SIZE 2000M REUSE AUTOEXTEND ON NEXT 104K MAXSIZE 2000M , '/alpha/oradata/prod01/undotbs02.dbf' SIZE 2000M REUSE AUTOEXTEND ON NEXT 25600K MAXSIZE 2000M

Rollback segment error ORA-1628

Hellow
Currently we are working on Oracle 8i database.The database contain spatial data around 10GB.We have a tablespace RBS containing 4 rollback segments. The issue is whenever we try to insert spatial data we get this error message (in the alert file)
ORA-1628: max # extents 121 reached for rollback segment R01
Failure to extend rollback segment 2 because of 1628 condition
FULL status of rollback segment 2 cleared.
I extended the size of RBS tablespace by adding another datafile, but still it doesn't help.
Also i found that RBS tablespace is marked as PERMANENT...it means the rollback data does not get flushed out periodically?Also Should this tablespace be temporary? How can i counter this problem?
Regards
Sam

Hi,
01628, 00000, "max # extents (%s) reached for rollback segment %s"
// *Cause: An attempt was made to extend a rollback segment that was
// already at the MAXEXTENTS value.
// *Action: If the value of the MAXEXTENTS storage parameter is less than
// the maximum allowed by the system, raise this value. => Alter your RBS and allow more than 121 extents to be created in this RBS.
Also i found that RBS tablespace is marked as PERMANENT.Yes, it's normal.
..it means the rollback data does not get flushed out periodically?No
Also Should this tablespace be temporary? No, this can't be
How can i counter this problem?Free advise: RTFM about Rollback Segments! Start here (8i doc) or read the Concepts book.
Regards,
Yoann.

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

ORA-01555: snapshot too old: rollback segment number 3 with name "_SYSSMU3$

A Materalized view is scheduled to update every 12 hours . When it has tried to update it has thrown the error ...
ORA-12008: error in materialized view refresh path
ORA-01555: snapshot too old: rollback segment number 3 with name "_SYSSMU3$"
too small
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 803
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 860
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 841
ORA-06512: at line 1

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-01041: internal error. hostdef extension doesn't exist

hi all,
i am presently working on logical standby database
but i am facing a problem from primary database
" select * from V$ARCHIVE_DEST"
LOG_ARCHIVE_DEST_1 valid
LOG_ARCHIVE_DEST_2 ERROR ORA-01041: internal error. hostdef extension doesn't exist
at present database not synchronizing
please help
in alert.log file at primary
ARC9: Attempting destination LOG_ARCHIVE_DEST_2 network reconnect (1041)
ARC9: Destination LOG_ARCHIVE_DEST_2 network reconnect abandoned
PING[ARC9]: Error 1041 when pinging standby 'standby server'.
Standby database is in running mode & well connected with network
Vaibhav
Edited by: Vaibhav Dixit on Oct 20, 2011 4:43 PM
Edited by: Vaibhav Dixit on Oct 20, 2011 4:43 PM

okkk
thanks for reply
i m also getting some problem in standby database in just 2-3 days
error is ->
ORA-03135: connection lost contact
LOG_ARCHIVE_DEST_2 ERROR ORA-01041: internal error. hostdef extension doesn't exist
then
i have passed some command on primary db & now it's working but i don't know it's good for db or not
ALTER SYSTEM SET log_archive_dest_state_2=’DEFER’ SCOPE=BOTH;
ALTER SYSTEM SET log_archive_dest_state_2=’ENABLE’ SCOPE=BOTH;
please give a idea to resolve this problem
regards
Vaibhav

ORA-1650: unable to extend rollback segment

Hi,
We have 20 RBS's and in our production instance we got very frequent alerts related to ORA-1650: unable to extend rollback segment continuously. When I looked for select STATUS from v$rollstat; I could see most of them are with FULL status. after couple of hours they disappeared and status became online.
How to avoid these type of alerts?
REgards

What version of Oracle?
If you are 9ir2 or later, you should be going to automatic undo management. Though it won't help your 'we cannot add space' restriction. That's not an Oracle problem, that's a corporate issue.
This problem may be caused by poor transaction design with too many processing doing too infrequent commits. That's not an Oracle problem either, that's a corporate/development issue.
So...you don't have an Oracle problem.
You can't stop the 1650s from occurring if you are unwilling to add space or address application issues. However, you can set up an email filter so that any emails containing ORA-01650 in the header or body get automatically sent to the trash.
<sarcasm>
If you can't solve a problem, then just ignore it!
</sarcasm>

ORA-01534: Rollback Segment "R1" doesn't exist

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