Rollback segment in locally manage tablespace

Is it possible to create rollback segment in
locally manage tablespace in oracle 8i(8.1.6)
kuljeet pal singh

Srini,
Both the 10gR2 and 11gR2 versions of the database are using automatic undo management.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
SQL> show parameter undo
NAME TYPE VALUE
_undo_autotune boolean TRUE
undo_management string AUTO
undo_retention integer 14400
undo_tablespace string UNDOTBS1
SQL>
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> show parameter undo
NAME TYPE VALUE
undo_management string AUTO
undo_retention integer 14400
undo_tablespace string UNDOTBS1
SQL>
Do you know anything about Oracle no longer automatically creating R0 in 11gR2?
Thanks,
Bill

Similar Messages

Error:cannot use system rollback segment for non-system tablespace

Hi,
I have created a oracle database 10.2.0 on fedora 9 system. I have created a user and assigned the default tablespace SATYA and given the permissions. But when I create a table in the user I am getting the following error.
Can anyone help me in rectifying this error.
ORA-01552: cannot use system rollback segment for non-system tablespace 'SATYA'
thankyou
satya

Undo management is either AUTO or Manual, no local
http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/undo.htm#sthref1469
Since you are using 10g, you are recommended to use Auto undo management
If you still plan to use manual undo management, make sure you have other non-system rollback segment in place.

Explain local manage tablespace and dictionary manage tablespace

hi all,
kindly help me to understand local manage and dictionary manage tablespace
i have read search result and oracle corporation book still unable to understand
what i know that local is managed by bitmap(no redo) and dictionary is managed by dictionary(generates redo) plz explain this as well
and also suggest me some documentation.
thanks
Navin

Navin,
These are excerpts from Oracle documentation
Dictionary Managed Tablespace_
If you created your database with an earlier version of Oracle, then you could be using dictionary managed tablespaces. For a tablespace that uses the data dictionary to manage its extents, Oracle updates the appropriate tables in the data dictionary whenever an extent is allocated or freed for reuse. Oracle also stores rollback information about each update of the dictionary tables. Because dictionary tables and rollback segments are part of the database, the space that they occupy is subject to the same space management operations as all other data.
Lcaolly Managed Tablesapce_
A tablespace that manages its own extents maintains a bitmap in each datafile to keep track of the free or used status of blocks in that datafile. Each bit in the bitmap corresponds to a block or a group of blocks. When an extent is allocated or freed for reuse, Oracle changes the bitmap values to show the new status of the blocks. These changes do not generate rollback information because they do not update tables in the data dictionary (except for special cases such as tablespace quota information).
Locally managed tablespaces have the following advantages over dictionary managed tablespaces:
Local management of extents automatically tracks adjacent free space, eliminating the need to coalesce free extents.
Local management of extents avoids recursive space management operations. Such recursive operations can occur in dictionary managed tablespaces if consuming or releasing space in an extent results in another operation that consumes or releases space in a data dictionary table or rollback segment.
The sizes of extents that are managed locally can be determined automatically by the system. Alternatively, all extents can have the same size in a locally managed tablespace and override object storage options.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/physical.htm#sthref518
Regards

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.

Portal, Tablespace defragmentation and Locally Managed tablespaces

We are setting up a Big portal installation. We want to use seperate small, medium and large tablespaces for data, lobs and index as described in the de-fragmention start living white paper. We will also use locally managed tablespaces.
Has anybody set-up a portal installation like this. What where the large and medium data, index and lob segments ?
null

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by David Stoller ():
Anyone try using IFS in a Locally Managed Tablespace? Is it OK?<HR></BLOCKQUOTE>
Yes, we have all tablespaces managed locally. No problems with that.

Create table with storage parameters in a locally managed tablespace

Hi,
Can we create object with storage parameters in a locally managed tablespace.
CREATE TABLE my_hash_table_6 (
name VARCHAR2(30),
value VARCHAR2(4000) )
STORAGE (
INITIAL 1M
NEXT 512K
PCTINCREASE 0
MINEXTENTS 2
MAXEXTENTS UNLIMITED )
users default tablespace is locallly managed.
Then this table's extent management will be managed as per the tablespace or as the storage parameters which
were specified at the time of table creation.

Why don't you try it yourself ?
TEST@db102 > select * from dba_tablespaces
2 where TABLESPACE_NAME='USERS';
TABLESPACE_NAME                BLOCK_SIZE INITIAL_EXTENT NEXT_EXTENT MIN_EXTENTS
MAX_EXTENTS PCT_INCREASE MIN_EXTLEN STATUS    CONTENTS LOGGING   FOR EXTENT_MAN
ALLOCATIO PLU SEGMEN DEF_TAB_ RETENTION   BIG
USERS                                8192          65536                       1
2147483645                   65536 ONLINE    PERMANENT LOGGING   NO LOCAL
SYSTEM    NO AUTO   DISABLED NOT APPLY   NO
TEST@db102 > CREATE TABLE my_hash_table_6 (
2 name VARCHAR2(30),
3 value VARCHAR2(4000) )
4 STORAGE (
5 INITIAL 1M
6 NEXT 512K
7 PCTINCREASE 0
8 MINEXTENTS 2
9* MAXEXTENTS UNLIMITED )
TEST@db102 > /
Table created.
TEST@db102 > select * from user_segments
2 where segment_name='MY_HASH_TABLE_6';
SEGMENT_NAME
PARTITION_NAME                 SEGMENT_TYPE       TABLESPACE_NAME
     BYTES     BLOCKS    EXTENTS INITIAL_EXTENT NEXT_EXTENT MIN_EXTENTS
MAX_EXTENTS PCT_INCREASE FREELISTS FREELIST_GROUPS BUFFER_
MY_HASH_TABLE_6
                               TABLE              USERS
   2097152        256          2        1572864                       1
2147483645                                         DEFAULT
TEST@db102 >

Default storage for locally managed tablespaces

the documentation says you cannot have a default storage parameter for locally managed tablespaces. Does this mean that we cannot specify
INITIAL
NEXT
PCTINCREASE
MINEXTENTS
MAXEXTENTS for such tablespaces, or is there another way we can, without using default storage?
thanks

I amnot sure where you read that part that the default storage clause can't be given.Please see here,
http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/tspaces.htm#sthref1149
From the doc,
Creating a Locally Managed Tablespace
If the CREATE TABLESPACE statement includes a DEFAULT storage clause, then the database considers the following:
If you specified the MINIMUM EXTENT clause, the database evaluates whether the values of MINIMUM EXTENT, INITIAL, and NEXT are equal and the value of PCTINCREASE is 0. If so, the database creates a locally managed uniform tablespace with extent size = INITIAL. If the MINIMUM EXTENT, INITIAL, and NEXT parameters are not equal, or if PCTINCREASE is not 0, the database ignores any extent storage parameters you may specify and creates a locally managed, autoallocated tablespace.
If you did not specify MINIMUM EXTENT clause, the database evaluates only whether the storage values of INITIAL and NEXT are equal and PCTINCREASE is 0. If so, the tablespace is locally managed and uniform. Otherwise, the tablespace is locally managed and autoallocated.
HTH
Aman....

Locally Managed tablespaces?

Into the Design Editor, Admin tab: How can I define a tablespace as Locally Managed?

Harvinder,
Locally managed tablespaces are part of the new features of Oracle 8i. the advantages
are when they database objects need to allocate space, they need not go through the
data dictionary, they can find the free space
through bitmaps in the datafile, hence the name locally managed tablespaces.
this improves performance because recursive sql (update/insert/select of data dictionary tables) is avoided.
temporary tablespaces are prime candidates for locally managed tablespaces.
yes the whole database can be created with locally managed tablespaces..but with some restrictions. see oracle documentation for further details.
Mukundan.

Bitmap indexes to track extents in locally managed tablespaces

does any body have any idea that how oracle tracks free and used extents with bitmap indexes in locally managed tablespaces ?
please reply

There are no bitmap indexes, there is a 64k tablespace header block containing the bitmap of occupied and free extents.
Sybrand Bakker
Senior Oracle DBA

ORA-01552: cannot use system rollback segment for non-system tablespace

i try to create a table in new schema test1 and got the following error. please help.
SQL> create table employer1 as select * from a.employer;
create table employer1 as select * from a.employer
ERROR at line 1:
ORA-01552: cannot use system rollback segment for non-system tablespace 'TEST1'

Hi,
This is an example:
SQL>
CREATE UNDO TABLESPACE "UNDOTMP"
DATAFILE 'UNDOTMP.DBF01' SIZE 100M REUSE
AUTOEXTEND ON NEXT 51200K MAXSIZE 15000M
ALTER SYSTEM SET undo_tablespace=UNDOTMP SCOPE=BOTH;
Regards
David Duenas
Edited by: David Duenas on Jul 4, 2009 7:33 PM

Cannot use system rollback segment for non-system tablespace

I am getting the below error suddently
ORA-01552: cannot use system rollback segment for non-system tablespace 'USERS'

SQL> show parameter undo
Version : Oracle 10g
NAME TYPE VALUE
undo_management string AUTO
undo_retention integer 10800
undo_tablespace string UNDO
SQL>
SQL> select distinct tablespace_name, status from dba_rollback_segs
2 ;
TABLESPACE_NAME STATUS
SYSTEM ONLINE
UNDO OFFLINE
UNDO ONLINE

Locally managed tablespaces in Apps 11.0.3

Hi,
we are on Oracle Apps 11.0.3. we recently upgraded the database to 8i ( 8.1.7.4 ). I would like to change some high activity tablespaces to locally managed tablespaces to improve performance. Are there any issues in doing this ? Can I benefit from this or will I have any issues.
thanks
Ram

We moved all the tablespaces to locally managed. Although we convereted the tablespaces to locally managed, occassionally we would see some of the ddl commands hang, cause being system still trying to update fet$ and uet$ tables. We were able to fix this by creating new locally managed tablespaces and move the contents to new locally managed tablespaces.

Downsides to Locally Managed Tablespaces?

I am creating a database from scratch and am looking at locally managed tablespaces.
Are there any downsides to locally managed tablespaces?
I understand that if the SYSTEM tablespace is locally managed, then all other tablespaces need to be locally managed. Are there any cons to this?

<quote source="AskTom.oracle.com">
Locally managed tablespaces are much faster at allocating and de-allocating
extents - many order of magnitudes faster.
locally managed tablespaces decrease contention on the data dictionary.
There is nothing bad about them, only good things.
</quote>
http://asktom.oracle.com/pls/ask/f?p=4950:8:720407411417074486::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:409670433426

ORA-03264: cannot drop offline datafile of locally managed tablespace

Hi list
A datafile was acidentally created on filesystem in one node of two nodes RAC.
After that the filesystem on which the datafile was created was out of space because of automatic control file backup and sysadmin move this datafile to another device. And before this action RMAN backup stopped work.
Now we replace the datafile to the original location, but it stay offline and recover status, and we cant bring them online because the customer dont have necessary archive logs to recover this datafile. RMAN backup is now working. But now we need to create a DataGuard on a third server and want to drop this datafile.
This datafile dont have any data segment and stay in most critical tablespace of the customer application which have more datafiles. This datafile in question isnt the first datafile of the tablespace.
SQL> select file#, status from v$datafile where name='/oracle/product/db/ars/dbs/arsystem.old';
FILE# STATUS
21 RECOVER
SQL> select file#, status from v$datafile_header where name='/oracle/product/db/ars/dbs/arsystem.old';
FILE# STATUS
21 OFFLINE
How can I drop this datafile?
Thanks
Cristiano

Review this metalink note, what to do:
How to 'DROP' a Datafile from a Tablespace
Doc ID:111316.1
If you cannot recover the datafile, you have to export the 'rest' of the tablespace (after statement 'alter database datafile '/oracle/product/db/ars/dbs/arsystem.old' offline drop;' was successfully issued). Afterwards drop the tablespace,recreate it and import the data).
Werner

Error rollback segment - urgent

hi
i have created locally managed tablesspace and in init.ora file i have sent unto management as manual as our application needs to specify rollback segments
when i created rollback segments and attached to a locally managed tablespace i am getting ora-01552 error
i have also speecified names of rollback segment in init.ora file
ERROR at line 1:
ORA-01552: cannot use system rollback segment for non-system tablespace 'ROLLTBLS'
can i not specify a rollback segment to locally managed tablespace
regards
Kedar

the database is in open mode and the undo_management is set to manual. after i created the locally managed tablespace i ran the script for rollback segment refering to one of the above locally managed tablespace
what other checks do i have to make for creating rollback segment.

Rollback segment in locally manage tablespace

Similar Messages

Maybe you are looking for