Dropping Undo Tablespace 9i
Hey Folks,
I really need some help here.
I'm trying to drop/recreate the undo tablespace (currently 25gig) Oracle 9i
When I try to drop the undo tablespace 'UNDOTBS1' I get the following error:
âORA-01548: active rollback segment '_SYSSMU1$' found, terminate dropping tablespaceâ
Here's what I have tried so far:
- Bounced the DB several times hoping to get rid of the reference to the active rollback segment. No luck.
- Created a new undo table space
- Tried 'Alter system set undo_tablespace=new_one' (noticed that 10 new rollback segs were created '_SYSMU11$..SYSMU20$' pointing to the new undo tablespace)
- I then performed an offline drop of the undo tablespace data file. After the offline drop, the system rollback segs SYSMU01$..SYSMU10$ went offline as would be expected.
- Even with the new undo tablespace, all other application tablespaces still use the old undo which due to the offline drop, no inserts, deletes, etc. will work.
After all the above, I still get the same error when trying to drop the undo tablespace.
Any ideas? Ideally I would like to be able to drop the undo tablespace and recreate it, but at this point I'd be happy to bring back the undo tablespace datafile so we can at least use the database again.
Thanks in advance!!
Colin
SQL> show parameters undo
undo_retention integer
10800
undo_suppress_errors boolean
FALSE
undo_tablespace string
UNDOTBS03
r.- The undo tablespace which the database is looking for is this one ( UNDOTBS03 )
What is strange about the lines above is that I have
all those params above commented out in my
\pfile\init.ora file (and have bounced the db).
Iâm not sure why they are still showing up.
r.- Perhaps your instance is started with the spfile instead of the init file
Here's what we did after the UNDOTBS1 tablespace
caused the disk to run out of space during a large
import (from now on we are going to use commit = y):
1. Created a new undo tablespace UNDOTBS03 - got
errors so instead we to created it as a temp
tablespace UNDOTBS03 which worked. r.- Yes, but that tablespace was created as a UNDO TABLESPACE ?
2. Tried to drop UNDOTBS1 got the following error
msg:
ORA-01548: active rollback segment '_SYSSMU1$' found,
terminate dropping tablespacer.- Of course, the database did not allow to drop it beacause there were pending transactions
3. SQL> alter system set undo_tablespace =
'UNDOTBS03' scope = both. Tried dropping UNDOTBS1.
Same error as in #2 above.r.- There were still pending transactions with the older undo tablespace
4. We then offline dropped the datafile associated
with UNDOTBS1 hoping that would then allow us to drop
UNDOTBS1. Same error as #2.r.- That was the worst you did. You can not drop a tablespace so...
5. Then tried creating a undo tablespace again:
Create UNDO tablespace undo_temp
datafile 'D:\oracle\oradata\usbperf\undo_temp.DBF'
size 25m autoextend on;
Error on line 0
Create UNDO Tablespace undo_temp
datafile 'D:\oracle\oradata\usbperf\undo_temp.
ORA-00604: error occurred at recursive SQL level 1
ORA-00376: file 2 cannot be read at this time
ORA-01110: data file 2:
'D:\ORACLE\ORADATA\USBPERF\UNDOTBS01.DBF'
So thatâs where we are. I'm guessing that the
original undo tablespace corrupted when it tried to
extend and ran of disk space?
Thanks again for the help.
Colin ok I can guide to solve this but you have to do what I am going to tell you step by step. Is this a production database ?
Joel Pérez
http://www.oracle.com/technology/experts
Similar Messages
-
Cannot drop undo tablespace with Active extents but no active sessions
Hi all,
I am running on 10gr2 oracle database in a Linux 32 bit environment.
I have a corrupted undo datafile. I've been able to recover the datafile but still the alert logs is still showing that it is corrupted.
Now what I'm trying to do is to drop the old undo tablespace like the one discussed here Change undo tablespace in Oracle - Switch Oracle's Undo tablespace.
My problem is I have an Active extent but no active session corresponding to it:
SYS@ccasdb AS SYSDBA > SELECT a.name,b.status
FROM v$rollname a,v$rollstat b
WHERE a.usn = b.usn
AND a.name IN (
SELECT segment_name
FROM dba_segments
WHERE tablespace_name = 'UNDOTBS1'
); 2 3 4 5 6 7 8
NAME STATUS
_SYSSMU18$ PENDING OFFLINE
SYS@ccasdb AS SYSDBA > SELECT a.name,b.status , d.username , d.sid , d.serial#
2 FROM v$rollname a,v$rollstat b, v$transaction c , v$session d
3 WHERE a.usn = b.usn
4 AND a.usn = c.xidusn
5 AND c.ses_addr = d.saddr
6 AND a.name IN (
7 SELECT segment_name
8 FROM dba_segments
9 WHERE tablespace_name = 'UNDOTBS1'
10 );
no rows selected
but still cannot drop the undotablespace.
SYS@ccasdb AS SYSDBA > drop tablespace UNDOTBS1 including contents and datafiles;
drop tablespace UNDOTBS1 including contents and datafiles
ERROR at line 1:
ORA-30013: undo tablespace 'UNDOTBS1' is currently in use
Regards,
TimYes i was able to recover the datafile but the alert_log kept on prompting that it is still corrupted. The datafile's status is online.
I want to kill the session/s contributing to the PENDING OFFLINE status of the rollback segment so I can already drop the undotablespace and so
that the alert log will stop prompting for that corrupted datafile in that UNDOTABLESPACE.
Can i Just alter the tablespace's datafiles to offline drop then just drop it. Then I drop the tablespace? -
Hello:
I've created a new undo tablespace undotbs2. I've set it to the default undo tablespace. When I've tried to drop the old one, I get the following error:
SQL> conn / as sysdba
Connected.
SQL> DROP TABLESPACE undotbs1 INCLUDING CONTENTS AND DATAFILES;
DROP TABLESPACE undotbs1 INCLUDING CONTENTS AND DATAFILES
ERROR at line 1: ORA-01548: active rollback segment '_SYSSMU7$' found, terminate dropping tablespace
This is a production database. The service is down because the partition with the Oracle tablespaces: system, undo, temp, etc is full.
After shutting down the database the problem persist: I cannot drop the old undo tablespace because of the same error.
I've followed the note 1321093.1. Here the query results:
Select segment_name, status, tablespace_name, rs.segment_id
from dba_rollback_segs rs
where status not in ('ONLINE','OFFLINE');
_SYSSMU7$ PARTLY AVAILABLE UNDOTBS1 7
SELECT KTUXEUSN, KTUXESLT, KTUXESQN, /* Transaction ID */ KTUXESTA Status, KTUXECFL Flags
FROM x$ktuxe
WHERE ktuxesta !='INACTIVE' AND ktuxeusn =7;
7 47 382687 ACTIVE DEAD
SELECT LOCAL_TRAN_ID,GLOBAL_TRAN_ID,STATE,MIXED,COMMIT# FROM DBA_2PC_PENDING;
No rows
SELECT LOCAL_TRAN_ID,IN_OUT,DATABASE,INTERFACE FROM dba_2pc_neighbors;
No rows
As you can see, there is no pending transactions. No application is connected to the database (service is down), however the database is appling rollbacks since 2 days.
A lot of archivelogs are being created at rolling back (30 GB archivelogs per hour). Here a tail of the alertlog file:
Wed Apr 17 06:19:53 2013
Thread 1 advanced to log sequence 7382
Current log# 5 seq# 7382 mem# 0: /ora2/origlogs/webfrbr/redo05_m1.log
Current log# 5 seq# 7382 mem# 1: /ora3/mirrorlogs/webfrbr/redo05_m2.log
Wed Apr 17 06:21:16 2013
Thread 1 advanced to log sequence 7383
Current log# 6 seq# 7383 mem# 0: /ora2/origlogs/webfrbr/redo06_m1.log
Current log# 6 seq# 7383 mem# 1: /ora3/mirrorlogs/webfrbr/redo06_m2.log
Wed Apr 17 06:22:41 2013
Thread 1 advanced to log sequence 7384
Current log# 4 seq# 7384 mem# 0: /ora2/origlogs/webfrbr/redo04_m1.log
Current log# 4 seq# 7384 mem# 1: /ora3/mirrorlogs/webfrbr/redo04_m2.log
Wed Apr 17 06:24:02 2013
Thread 1 advanced to log sequence 7385
Current log# 5 seq# 7385 mem# 0: /ora2/origlogs/webfrbr/redo05_m1.log
Current log# 5 seq# 7385 mem# 1: /ora3/mirrorlogs/webfrbr/redo05_m2.log
Wed Apr 17 06:25:24 2013
Thread 1 advanced to log sequence 7386
Current log# 6 seq# 7386 mem# 0: /ora2/origlogs/webfrbr/redo06_m1.log
Current log# 6 seq# 7386 mem# 1: /ora3/mirrorlogs/webfrbr/redo06_m2.log
Wed Apr 17 06:26:46 2013
Thread 1 advanced to log sequence 7387
Current log# 4 seq# 7387 mem# 0: /ora2/origlogs/webfrbr/redo04_m1.log
Current log# 4 seq# 7387 mem# 1: /ora3/mirrorlogs/webfrbr/redo04_m2.log
Oracle Database - Enterprise Edition 10.2.0.3
Linux x86-64 Oracle Linux 5
Please, consider the output of the following queries too:
select * from V$FAST_START_TRANSACTIONS
USN 7 -- Undo segment number of the transaction
SLT 47 -- Slot within the rollback segment
SEQ 382687 -- Incarnation number of the slot
STATE RECOVERING --
UNDOBLOCKSDONE 0 -- Number of undo blocks completed on the transaction
UNDOBLOCKSTOTAL 2079151 -- Total number of undo blocks that need recovery
PID 15 -- ID of the current server it has been assigned to
CPUTIME 1153 -- Time for which recovery has progressed (in seconds)
PARENTUSN 0 -- Undo segment number of the parent transaction in PDML
PARENTSLT 0 -- Slot of the parent transaction in PDML
PARENTSEQ 0 -- Sequence number of the parent transaction in PDML
XID 07002F00DFD60500 -- Transaction ID
PXID 0000000000000000 -- Parent transaction ID
RCVSERVERS 1 -- Number of servers used in the last recovery
select * from x$ktuxe where ktuxecfl = 'DEAD';
ADDR 00002B3E808B9BD8
INDX 145
INST_ID 1
KTUXEUSN 7
KTUXESLT 47
KTUXESQN 382687
KTUXERDBF 2
KTUXERDBB 2080076
KTUXESCNB 424110769
KTUXESCNW 0
KTUXESTA ACTIVE
KTUXECFL DEAD
KTUXEUEL 3739
KTUXEDDBF 0
KTUXEDDBB 0
KTUXEPUSN 0
KTUXEPSLT 0
KTUXEPSQN 0
KTUXESIZ 2079151
select * from v$fast_start_servers;
RECOVERING 0 15 07002F00DFD60500
IDLE 0 16 0000000000000000
IDLE 0 17 0000000000000000
IDLE 0 18 0000000000000000
IDLE 0 19 0000000000000000
IDLE 0 20 0000000000000000
IDLE 0 21 0000000000000000
IDLE 0 22 0000000000000000
IDLE 0 25 0000000000000000
IDLE 0 26 0000000000000000
IDLE 0 27 0000000000000000
IDLE 0 28 0000000000000000
IDLE 0 29 0000000000000000
IDLE 0 30 0000000000000000
IDLE 0 31 0000000000000000
IDLE 0 32 0000000000000000
Any ideas to solve this issue?
Thank you in advance
Edited by: albrotar on Apr 17, 2013 1:48 AM
Edited by: albrotar on Apr 17, 2013 1:49 AM
Edited by: albrotar on Apr 17, 2013 1:51 AM
Edited by: albrotar on Apr 17, 2013 1:52 AM
Edited by: albrotar on Apr 17, 2013 1:54 AMI've found some errors in alert log file occurred at shutting down the database:
+...+
Control autobackup written to DISK device
handle '/orabck/rman/webfrbr/ora_cfc-3587726327-20130414-00'
Completed: CREATE UNDO TABLESPACE undotbs2 DATAFILE '/orabck/undo/undotbs02.dbf'
SIZE 500M reuse autoextend ON NEXT 5M maxsize 32767M
Sun Apr 14 15:46:43 2013
Successfully onlined Undo Tablespace 5.
Undo Tablespace 1 moved to Pending Switch-Out state.
*** active transactions found in undo tablespace 1 during switch-out.
Sun Apr 14 15:46:44 2013
ALTER SYSTEM SET undo_tablespace='UNDOTBS2' SCOPE=BOTH;
Sun Apr 14 16:11:42 2013
ALTER ROLLBACK SEGMENT "_SYSSMU7$" offLINE
Sun Apr 14 16:11:42 2013
Completed: ALTER ROLLBACK SEGMENT "_SYSSMU7$" offLINE
Sun Apr 14 16:12:36 2013
DROP TABLESPACE undotbs1 INCLUDING CONTENTS AND DATAFILES
Sun Apr 14 16:12:36 2013
+...+
Thread 1 advanced to log sequence 5107
Current log# 4 seq# 5107 mem# 0: /ora2/origlogs/webfrbr/redo04_m1.log
Current log# 4 seq# 5107 mem# 1: /ora3/mirrorlogs/webfrbr/redo04_m2.log
Sun Apr 14 19:00:28 2013
Stopping background process CJQ0
Sun Apr 14 19:00:29 2013
Stopping background process QMNC
Sun Apr 14 19:00:31 2013
Stopping background process MMNL
Sun Apr 14 19:00:32 2013
Stopping background process MMON
Sun Apr 14 19:00:34 2013
Shutting down instance (immediate)
License high water mark = 31
Sun Apr 14 19:00:34 2013
Stopping Job queue slave processes
Sun Apr 14 19:00:34 2013
Job queue slave processes stopped
All dispatchers and shared servers shutdown
Sun Apr 14 19:00:42 2013
ALTER DATABASE CLOSE NORMAL
Sun Apr 14 19:04:28 2013
+...+
Thread 1 advanced to log sequence 5118
Current log# 6 seq# 5118 mem# 0: /ora2/origlogs/webfrbr/redo06_m1.log
Current log# 6 seq# 5118 mem# 1: /ora3/mirrorlogs/webfrbr/redo06_m2.log
Sun Apr 14 20:11:21 2013
Errors in file /ora1/admin/webfrbr/bdump/webfrbr_smon_4629.trc:
+ORA-07445: exception encountered: core dump [_intel_fast_memcpy.A()+10] [SIGSEGV] [Invalid permissions for mapped object] [0x2B6B66003000] [] []+*
Sun Apr 14 20:11:21 2013
Errors in file /ora1/admin/webfrbr/bdump/webfrbr_smon_4629.trc:
ORA-00600: internal error code, arguments: [999], [0x107C14015], [], [], [], [], [], []*
+ORA-07445: exception encountered: core dump [_intel_fast_memcpy.A()+10] [SIGSEGV] [Invalid permissions for mapped object] [0x2B6B66003000] [] []+*
Sun Apr 14 20:11:22 2013
+...+
Sun Apr 14 20:11:48 2013
Errors in file /ora1/admin/webfrbr/bdump/webfrbr_pmon_4617.trc:
ORA-00474: SMON process terminated with error
Sun Apr 14 20:11:48 2013
+...+
The instance could start up, but after this, it is recovering undo and generating redo since 2 days -
Drop Undo Tablespace taking more than 1 hr
Hi,
To give you background, I had given an "insert into .. select" command which was inserting 3 millions of rows of rowidth approx 5000 bytes. The window on which it was given, was closed by mistake.
After sometime when I checked the size of undo_tablespace, it was 5.5GB. I decided to create a new one and drop the old undo_tbsp.
I have successfully created new undo tablespace and changed the same in spfile also.
now when i am dropping the old undo tablespace, its taking long time. its almost an hour, but the tablespace has not been dropped yet.
I have given following command
drop tablespace undotbs_01 including contents;
Any idea, why is it taking so much time, and how long should I wait?
If someone can give me any other idea on how can I drop the tablespace, that will be great.
Regards,
Archana.To give you background, I had given an "insert into .. select" command which was inserting 3 millions of rows of rowidth approx 5000 bytes. The window on which it was given, was closed by mistake.This could be the cause.
I wonder the killed/closed session doesn't hangup with a latch or lock.
Since the old undo tbs had active transaction, it might have to pending offline status. If so, you can drop it.
Jaffar -
Guys,
I want to create a new undo tablespace and drop the old one.
I followed the below steps, but could not drop it
create undo tablespace UNDOTBS datafile '/ora01/oradata/DEVTDB/undotbs.dbf' size 100m AUTOEXTEND ON MAXSIZE 5G;
alter system set undo_tablespace=UNDOTBS scope=both;
alter tablespace UNDOTBS1 offline; -- this was successful
DROP TABLESPACE UNDOTBS1 INCLUDING CONTENTS AND DATAFILES CASCADE CONSTRAINTS;
-- Last command threw the following error:
ORA-01548: active rollback segment '_SYSSMU6$' found, terminate dropping tablespace
I am using oracle 10.2.0.4G on Linux Redhat.
Any help is appreciated.
Thanks!Charlov wrote:
Guys,
I want to create a new undo tablespace and drop the old one.
I followed the below steps, but could not drop it
create undo tablespace UNDOTBS datafile '/ora01/oradata/DEVTDB/undotbs.dbf' size 100m AUTOEXTEND ON MAXSIZE 5G;
alter system set undo_tablespace=UNDOTBS scope=both;
alter tablespace UNDOTBS1 offline; -- this was successful
DROP TABLESPACE UNDOTBS1 INCLUDING CONTENTS AND DATAFILES CASCADE CONSTRAINTS;
-- Last command threw the following error:
ORA-01548: active rollback segment '_SYSSMU6$' found, terminate dropping tablespace
I am using oracle 10.2.0.4G on Linux Redhat.
Any help is appreciated.
Thanks!Hi,
I think you need to wait until there's no active rollback segments in the old undotbs before you can drop it. You can also restart the instance to force Oracle to release the old undotbs.
HtH
//Johan -
Tive que criar uma segunda undo tablespace, mas agora não preciso mais dela. Posso apagá-la normalmente com um drop tablespace ou tenho que fazer alguma verificação antes? Ela não é mais a undo tablespace da instância.
Tive que criar uma segunda undo tablespace, mas agora
não preciso mais dela. Posso apagá-la normalmente com
um drop tablespace ou tenho que fazer alguma
verificação antes? Ela não é mais a undo tablespace
da instância.Writing in a language different from english greatly reduces your chances to receive an answer. The official forum language is english. People here have made a great effort to reply to your post. You could try those on-line translators to translate from Portuguese to English, instead of letting the posters translate your request.
On the other hand, once you have created a second undo tablespace which is no longer requried, just drop the tablespace, assuming you have not declared this as your database undo tablespace at the UNDO_TABLESPACE instance parameter. You may issue the command:
drop tablespace yourUndoTablespace including contents and datafiles;
and you are done.
~ Madrid
http://hrivera99.blogspot.com/ -
Drop undo tablespace but space not release (du and df show different value)
hi guys,
i just change my undo and drop the previous 1.
create undo tablespace UNDOTBS4 DATAFILE '/u03/oradata/starhub/undotbs4.dbf' size 2g;
Tablespace created.
SQL> ALTER SYSTEM SET UNDO_TABLESPACE = undotbs4;
System altered.
SQL> drop tablespace undotbs3 including contents and datafiles;
Tablespace dropped.
SQL>
However, when i check my diskspace using df -h , it is still showing. 32 gig is used. where infact, only 30G should be used.
71G 32G 37G 47% /u03
when i check using du -h, it is showing only
30G ./oradata
I have to bounce the database to get my 2G back, why ?
Is there anyway to get my 2G back without bouncing the DB ?
Regards,
NoobOracle has the file still open, so the i-node of that file is still in use, so the file shows up.
Learn your Unix!
Sybrand Bakker
Senior Oracle DBA -
Hi,
I am running Oracle 9.2 on Solaris. I have Automatic undo management turned on and have a Undo tablespace by name UNDOTBS. It has a single datafile and has AUTOEXTEND feature turned on. My UNDO_RETENTION was set to 4 hours.
Presently, the size of UNDOTBS has grown to around 40G and has filled up the file system in which it resides. I need to clean up the file system. In order to do this, I followed the below procedure.
SQL> create undo tablespace UNDOTBS1 datafile '/u04/oradata/proddb/undo_00.dbf' size 1024M autoextend off;
SQ> alter system set undo_tablespace=undotbs1 scope=both;
SQL> alter system set undo_retention=3600 scope=both;
Now, i checked the alert log and it is offlining all the UNDO segments of the first undo tablespace UNDOTBS. It is taking time and has been more than 1.5 hours. I have a couple of questions here,
1. As i have issued "alter system undo_tablespace=undotbs1 scope=both", all the new transactions will use the new UNDOTBS1. No new transactions will be using the first undo tablespace UNDOTBS right?
2. Since, i have issued "alter system undo_retention=3600 scope=both", all the transactions in first undo tablespace UNDOTBS will be rolled back after 2 hours, no matter if it is commited or not. After this period, i am safe to drop the first undo tablespace using "drop tablespace UNDOTBS including contents and datafiles;". Did i get it right?
Any information will be of a great help.
THanks,
Harris.Hi,
Thank you all for the replies. It has been two days since i switched the undo_tablespace to use the new tablespace(undotbs1) but my alert log is still being flooded with " Undo tablespace 1 moved to pending switch out state". I tried the following to see if there are any rows returne from the above query and it did 3 rows, showing some undo segments with the following output
SQL> select a.name, b.status from v$rollname a, v$rollstat b where a.name in (select segment_name from dba_segments where tablespace_name='UNDOTBS') and a.usn=b.usn;
Name Status
_SYSSMU15$ UNKNOWN
_SYSSMU33$ UNKNOWN
_SYSSMU9$ PENDING OFFLINE
I have seen gone through the metalink id: 341372.1 that speaks about this SWITCH-OUT state. How can i make sure what old transactions are still using the Undo segments in first undo tablespace and how can i go about killing them. Could anyone please let me know that i could use the following queries to find the correct sessions that are using the Old Undo tablespace.
SQL> select ADDR, XIDUSN,STATUS, START_TIME from v$transaction;
SQL> SELECT
a.usn,
a.name,
b.status,
c.tablespace_name,
d.addr,
e.sid,
e.serial#,
e.username,
e.program,
e.machine,
e.osuser
FROM
v$rollname a,
v$rollstat b,
dba_rollback_segs c,
v$transaction d,
v$session e
WHERE
a.usn=b.usn AND
a.name=c.segment_name AND
a.usn=d.xidusn AND
d.addr=e.taddr AND
b.status='PENDING OFFLINE';
Just wanted to make sure that the second query lists the PENDING OFFLINE segments of the first tablespace right?
This is a prod. box, so wanted to confirm with you guys before proceeding.
Thanks,
Harris. -
Dropping UNDO did not free space at OS level
Hi,
As my UNDO tablespace grew very large, i had to drop it by creating a second UNDO tablespace and switching the database to use it. After i successfully dropped the first UNDO, the file systems, which hosted the datafiles of the first UNDO still shows that they are 100% full. I have checked the alert log and everthing looks perfectly fine with the following message
drop tablespace undotbs1 including contents and datafiles
delted file '/u04/oradata/sunshine/undotbs1.dbf'
deleted file '/u06/oradata/sunshine/undotbs1_1.dbf'
Completed: drop tablespace undotbs1 including contents and datafiles
Even the two datafiles 'undotbs1.dbf' and 'undotbs1_1.dbf' were deleted with the "drop tablespace ........" command itself.
Is it required to bounce the database for the changes to be reflected at the OS level?
Any insight?
THanks,
Harris.Hi,
My Oracle version is 9.2.0.5 and i am running on Solaris 9. I have created a new UNDO tablespace UNDOTBS2 and dropped the old UNDO tablespace UNDOTBS1. After i issued the "drop tablespace UNDOTBS1 including contents and datafiles" it deleted the physical datafiles at the OS level too. I do not see any datafiles of the first dropped undo tablespace UNDOTBS1 in the directories specified i.e.,
'/u04/oradata/sunshine/undotbs1.dbf'
'/u06/oradata/sunshine/undotbs1_1.dbf'
So, the tablespace along with datafiles has been dropped (at the OS level too) with the "drop tablespace........" command itself. But, the file system still does not show the freed up space. I have altered the system to use the second undo tablespace UNDOTBS2 before dropping the first.
The second undo UNDOTBS2 has auto extend off, so there is no issue of this increasing to this much of size. The first undo tablespace that i dropped was around 15G of size and it has autoextend ON.
Any suggestions?
Thanks,
Harris. -
Iam getting error when dropping undo tablespace
drop tablespace undotbs1 including contents and datafiles;+
ORA-01548: active rollback segment '_SYSSMU1$' found, terminate dropping tablespace+
Version 10.2
Thanks in Advance
Abkas per the document
http://www.dba-oracle.com/t_fix_undo_log_corruption.htm
select
segment_name,
status
from
dba_rollback_segs
where
tablespace_name='undotbs1'
and
status = ‘NEEDS RECOVERY’;
_SYSSMU1$
_SYSSMU2$
_SYSSMU3$
_SYSSMU4$
_SYSSMU5$
_SYSSMU6$
_SYSSMU7$
_SYSSMU8$
_SYSSMU9$
_SYSSMU10$
_SYSSMU11$ -
While dropping the old undo tablespace we get an error
Hello friends ,
i Cannot drop old undo tablespace. While dropping the old undo tablespace we get an error
ERROR at line 1:
ORA-01548: active rollback segment '_SYSSMU77$' found, terminate dropping
tablespace
SQL> select tablespace_name, status, segment_name from dba_rollback_segs where status != 'OFFLINE';
TABLESPACE_NAME STATUS SEGMENT_NAME
SYSTEM ONLINE SYSTEM
APPS_UNDO NEEDS RECOVERY _SYSSMU77$
Please help
Thanks
Edited by: Vicky C on Dec 23, 2012 9:23 AMHi peter
We not using rman backup only cold backup.. i tried using cold backup in ramn block media recovery but that recovery needs archive log
RMAN> BLOCKRECOVER DATAFILE 158 BLOCK 48829;
Starting blockrecover at 18-DEC-12
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=437 devtype=DISK
channel ORA_DISK_1: restoring block(s) from datafile copy /var/undo/undo02.dbf
starting media recovery
media recovery failed
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of blockrecover command at 12/18/2012 16:45:11
ORA-00604: error occurred at recursive SQL level 1
ORA-01422: exact fetch returns more than requested number of rows
ORA-00279: change 5975281035000 generated at 12/08/2012 06:00:58 needed for thread 1
ORA-00289: suggestion : /prod/archlogs/1_465484_683651989.dbf
ORA-00280: change 5975281035000 for thread 1 is in sequence #465484
ORA-00278: log file '/prod/archlogs/1_465484_683651989.dbf' no longer needed for this re covery
we did not have block media recovery needed archivelog
Regards
Vignesh C -
Cannot drop old undo tablespace. Cause: active rollback segment
dear all.
db: oracle 10.2.0.1
os: rhel as version 5 64 bits.
This is a testing database. And my database is online and open. But i can free the external usb disk that contains my ols undotbs.
I want to drop old undo tablespace but this is not possible.
1.- In order to open my database i had my datafile( '/mnt/hdext/back_plelds/undotbs02.dbf') offline drop, and then i can to open my database.
2.- When i try to delete my old undo tablespace im getting this error:
SQL> drop tablespace undotbs1 including contents and datafiles;
drop tablespace undotbs1 including contents and datafiles
ERROR at line 1:
ORA-01548: active rollback segment '_SYSSMU1$' found, terminate dropping
tablespace
3.- My default undo_tablespace is another that i was created before step 1.
SQL> sho parameter undo_ta
NAME TYPE VALUE
undo_tablespace string UNDOTMP
SQL>
Well i search in metalink ORA-01548 code error and in 18947.1 doc whows me that the solution is:
Action: Shut down instances that use the active rollback segments in the
tablespace and then drop the tablespace.
4.- I try to shutdown but im getting:
SQL> shutdown immediate;
ORA-00376: file 10 cannot be read at this time
ORA-01110: data file 10: '/mnt/hdext/back_plelds/undotbs02.dbf'
SQL>
This /mnt/hdext is an external USB disk and i have all permissions. I exported tables without any problem and i can read all files.
i search un metalink again ora codes (ORA-00376 ORA-01110) and the doc id: 427801.1 shows in the solution:
Drop the old undo tablespace instead of making it offline.
but when i try to drop the tablespace it shows the error describe in the step 2.
Facts:
- my tablespace UNDOTBS1 is ONLINE. I put in offline and this is not the solution.
- This is the status of my rollback segments:
SQL> select segment_name, status from dba_rollback_segs where
2 tablespace_name='UNDOTBS1';
SEGMENT_NAME STATUS
_SYSSMU1$ NEEDS RECOVERY
_SYSSMU2$ NEEDS RECOVERY
_SYSSMU3$ NEEDS RECOVERY
_SYSSMU4$ NEEDS RECOVERY
_SYSSMU5$ NEEDS RECOVERY
_SYSSMU6$ NEEDS RECOVERY
_SYSSMU7$ NEEDS RECOVERY
_SYSSMU8$ NEEDS RECOVERY
_SYSSMU9$ NEEDS RECOVERY
_SYSSMU10$ NEEDS RECOVERY
_SYSSMU11$ OFFLINE
SEGMENT_NAME STATUS
_SYSSMU12$ OFFLINE
12 rows selected.
SQL>
- I have the note (Unable to drop und tablespace In this article describe the problem but this is not the same. The difference is that i cannot drop the rollback segment that describe in step 2.
SQL> drop rollback segment "_SYSSMU1$";
drop rollback segment "_SYSSMU1$"
ERROR at line 1:
ORA-30025: DROP segment '_SYSSMU1$' (in undo tablespace) not allowed
in metalink the doc id: 173696.1 shows the solution:
Action: Check the undo segment name and reissue statement if necessary.
i cannot drop the rollback_segment
What can i do ???
thanks a lot.in step 4 did you try with shutdown abort?
If its still does not work then create another new table space with new file and then swtich to that tablespace http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/undo.htm#sthref1504Khurram -
Cannot drop old undo tablespace.
Hello friends ,
i Cannot drop old undo tablespace. While dropping the old undo tablespace we get an error
ERROR at line 1:
ORA-01548: active rollback segment '_SYSSMU77$' found, terminate dropping
tablespace
Please help
ThanksHere's a blog post that may help you:
http://davidalejomarcos.wordpress.com/2010/11/09/ora-01548-active-rollback-segment-syssmu1xxxx-found-terminate-dropping-tablespace-while-deleting-undotbs/ -
TEST -- Active Undo Tablespace Drop
TEST
SUMMARY:-
When no active transactions are in UNDO tablespace, I can offline the undo datafile and subsequently drop the tablespace. No problems there.
Active Undo transactions combined with SHUTDOWN ABORT , I cannot open the database?
*****************SCREEN OUTPUT ************************
SQL>alter system set undo_tablespace='undotbs2' scope=spfile;
SQL> update mytst set table_name='jj';
1 row updated.
From another x-session I issued shutdown abort.
$mv undotbs02.dbf zz_undotbs02.dbf -- SImulate failure
SQL>ALTER DATABASE DATAFILE '/u02/app/oracle/oradata/HLCL/undotbs02.dbf' OFFLINE DROP ;
Database altered.
When i try to open the DB it gives
SQL> alter database open;
alter database open
ERROR at line 1:
ORA-01092: ORACLE instance terminated. Disconnection forced
I tried to trace the error:-
alter system set "_smu_debug_mode"=1 scope=spfile;
alter system set event = "10015 trace name context forever, level 10" scope=spfile;
No pertinent information in trace file is generated either. Any pointers.ARC0: STARTING ARCH PROCESSES COMPLETE
ARC0: Becoming the 'no FAL' ARCH
ARC0: Becoming the 'no SRL' ARCH
ARC0: Becoming the heartbeat ARCH
ARC1 started with pid=17, OS id=4502
Thu Jun 22 17:58:28 2006
Errors in file /u02/app/oracle/admin/HLCL/udump/hlcl_ora_4498.trc:
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 2
ORA-00376: file 6 cannot be read at this time
ORA-01110: data file 6: '/u02/app/oracle/oradata/HLCL/undotbs02.dbf'
Thu Jun 22 17:58:28 2006
Error 704 happened during db open, shutting down database
USER: terminating instance due to error 704
Instance terminated by USER, pid = 4498
ORA-1092 signalled during: ALTER DATABASE OPEN...
/u02/app/oracle/admin/HLCL/udump/hlcl_ora_4498.trc:
Hash table buckets = 32768
Longest hash chain = 0
Average hash chain = 0/0 = 0.0
Max compares per lookup = 0
Avg compares per lookup = 0/0 = 0.0
tkcrrsarc: (WARN) Failed to find ARCH for message (message:0x1)
tkcrrpa: (WARN) Failed initial attempt to send ARCH message (message:0x1)
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 2
ORA-00376: file 6 cannot be read at this time
ORA-01110: data file 6: '/u02/app/oracle/oradata/HLCL/undotbs02.dbf'
Thanks for looking. -
How to drop an undo tablespace which is in Pending Offline status
Dear All,
I changed my undo tablespace from undotbs1 to undonew in order to drop undotbs1.
But my undotbs1 is in pending offline state, how can i drop undotbs1
Thanks
MahiCheck here
Managing the Undo Tablespace
Query V$TRANSACTION find out which transaction holding rollback segment on old undo tablespace. Commit or rollback it.
Or simply wait for a while patiently.
Quote "
The switch operation does not wait for transactions in the old undo tablespace to commit. If there are any pending transactions in the old undo tablespace, the old undo tablespace enters into a PENDING OFFLINE mode (status). In this mode, existing transactions can continue to execute, but undo records for new user transactions cannot be stored in this undo tablespace.
An undo tablespace can exist in this PENDING OFFLINE mode, even after the switch operation completes successfully. A PENDING OFFLINE undo tablespace cannot be used by another instance, nor can it be dropped. Eventually, after all active transactions have committed, the undo tablespace automatically goes from the PENDING OFFLINE mode to the OFFLINE mode.
"
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