Undo tablespace continues to grow

Similar Questions

• Undo tablespace unable to grow beyond 31 GB.

  Hello
  
  ORACLE 11g
  Solaris 10
  BS.
  
  Undo tablespace unable to grow beyond 31 GB. It gives the error message below when importing dump file that contain data of 45 GB.
  
  ORA-30036: unable to extend segment by 8 in undo tablespace "UNDOTBS1.
  

  CREATE UNDO TABLESPACE undotbs_02 DATAFILE '+DATA/lims/hdb/undotbs02.dbf' SIZE 100M REUSE AUTOEXTEND ON NEXT 10M MAXSIZE UNLIMITED;
  
  SQL> show parameter undo
  
  NAME                                 TYPE        VALUE
  ------------------------------------ ----------- ------------------------------
  undo_management                      string      AUTO
  undo_retention                       integer     900
  undo_tablespace                      string      UNDOTBS_02
  
  
                                                               %
  Tablespace Name        KBytes         Used         Free   Used
  ---------------- ------------ ------------ ------------ ------
  *UNDOTBS_02        33,546,240   33,546,240            0  100.0
                   ------------ ------------ ------------
  sum                33,546,240   33,546,240            0

  with similar configuration machine, it works fine with the same dump file. is there something that we are missing?
  
  concerning
  Sachin

  You came to size max os for your data file. Add more data files to the undo tablespace.

• Undo tablespace in oracle 10g

  Hi all;

  Hello!

  I'm confused about undo tablespace size.

  Under query showing my undo tablespace size is 120Mo.

  but DBA_TABLESPACE_USAGE_METRICS view showing the undo tablespace size is 4194302

  > > Check free space

  SQ > select t.tablespace, t.totalspace as ' TOTAL_SPACE (MB).

  round ((t.totalspace-fs.freespace), 2) as "USED_SPACE (MB)",
  FS. FreeSpace as "FREE_SPACE (MB).
  round (((t.totalspace-fs.freespace) /t.totalspace) * 100, 2) like "% used (s),"
  round ((fs.freespace/t.totalspace) * 100, 2) as "% free" of
  (select round (sum (d.bytes) /(1024 * 1024)) as totalspace,)
  tablespace dba_data_files d.tablespace_name d
  Group d.tablespace_name) t,.
  (select round (sum (f.bytes) /(1024 * 1024)) as freespace,)
  tablespace dba_free_space f.tablespace_name f
  Group of f.tablespace_name)
  FS where t.tablespace = fs.tablespace order of t.tablespace.

  
  

  TABLESPACE TOTAL_SPACE (MB) USED_SPACE (MB) FREE_SPACE (MB) % used free %

  ------------------------------ --------------- -------------- -------------- ---------- ----------

  EXAMPLE                                    100             68             32         68         32

  240 230 10 SYSAUX 95,83 4.17

  480 475 5 98.96 SYSTEM 1.04

  UNDOTBS1                                   120            120              0        100          0

  1005 75 930 USERS 7.46 92.54

  SQL > select * from dba_tablespace_usage_metrics, where nom_tablespace like '% UNDO;

  NOM_TABLESPACE USED_SPACE TABLESPACE_SIZE USED_PERCENT

  ----------------------------    ----------  ---------------  ------------

  UNDOTBS1                              440        4194302 .010490422

  This is because:

  Tablespace_size in DBA_TABLESPACE_USAGE_METRICS takes the maximum file size for CanGrow tablespace that matches maxblocks in dba_data_files.

  This is not the same value you can get from dba_data_files.

  DBA_TABLESPACE_USAGE_METRICS shows essentially the maximum size to which a data file can grow. And DBA_DATA_FILES (+ DBA_FREE_SPACE) the current size of the tablespace.

  Watch more document MOS (My Oracle Support):

  Difference in size of dba_data_files Tablespace and dba_tablespace_usage_metrics/V values $ Filespace_usage (Doc ID 455715.1)

• Question about Undo Tablespace?

  Hello;
  
  The necessary size of the undo tablespace is the number and size of the transactions that occur on the database. But I do not need to interview one of these transactions for a schema or table using flashback it is a way to disable transactions writing on a table or schema of undo tablespace?
  
  Published by: Ecimen on 04.Mar.2013 03:50
  
  Published by: Ecimen on 03:51 04.Mar.2013

  Ecimen wrote:

  Rob_J wrote:
  OK, it's fine, so what makes you say you build too UNDO? What is the problem you're trying to solve? Or you want to know if you could get back to CANCEL in writing?

  Our log tables generate too much to cancel because we need you connecting all these data (insert and update for the most part)... but we don't care about these log tables, we want to reduce the cancellation written for these tables logs so that we could use more flashback query timestamp older due to more space in the undo tablespace...

  I think I mentioned in my other two answers above that it is not possible to disable the generation of the cancellation, or at least I don't know that there is no way to do it! What you can do, if you are worried about the Undo tablespace grows, it is that make you a tablespace size Undo fixed by controlling the Undo data that are generated. You can use Cancel Advisor of the to do. With the Undo retention period of your proposed, she would like the size of the Undo tablespace tips and you can add about 20-30% extra size and you should be fine. But as I've already said too much, he has No way to stop generating cancellation.

  Aman...

• Undo tablespace recreation

  Hi all
  
  I use oracle 9i running in solaris 9.I having a called undotbs1 undo tablespace that is size approximately 8.5 GB and
  
  the UNDO_RETENTION setting * 10800 * I want to reduce to 2000 and I want to create a tablespace, undo size about 3 GB and the value in the default undo for the database tablespace.
  
  change the system undo_retention = 2000 scope = both set
  create the undo tablespace undotbs2 datafile 'posted' size 3 G
  ALTER system set undo_tablespace = undotbs2 scope = both
  
  Drop tablespace undotbs1 including content and data files
  
  Is there a problem if I... I ask because my current undo tablespace size is 8.5 GB?
  
  Thanks and greetings
  Yvon Das

  >
  change the system undo_retention = 2000 scope = both set
  create the undo tablespace undotbs2 datafile 'posted' size 3 G
  ALTER system set undo_tablespace = undotbs2 scope = both

  Drop tablespace undotbs1 including content and data files

  Is there a problem if I... I ask because my current undo tablespace size is 8.5 GB?
  >
  It won't be a problem, but you must change a step you gave.
  After the ALTER SYSTEM you will not be able to drop the old table space until it disconnects.

  Display deleted mosaic then you will need to have two tablespaces to cancel online and that means a sufficient for both disk space.
  >
  The database is online, while the switch operation is performed and user transactions can be executed while this command is running. When the switch operation completes successfully, all transactions started after the beginning of the switching operation are assigned to the transaction tables in the tablespace new undo.

  The switch operation does not wait for transactions in the old undo tablespace to commit. If there is any pending transactions in the old undo tablespace, the old undo tablespace concludes an offline pending (status). In this mode, existing transactions can continue to run, 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. A cancellation pending offline tablespace cannot used by another instance, nor can it be moved. Finally, after all the active transactions have committed, the undo tablespace automatically goes to offline mode offline pending
  >

  See switching Undo tablespace in the Guide DBA 9i
  http://docs.Oracle.com/CD/B10501_01/server.920/a96521/undo.htm#9117

• Undo Tablespace - newbie question

  Q1. An Undo Tablespace is required in a database? I thought that only agents were SYSTEM and SYSAUX of TEMP?
  
  Q2. What happens if you do not have an Undo Tablespace?
  
  Q2. How are they an Undo Tablespace to undo / Rollback Segments in a database?

  Jim,

  I did not notice that it is not mentioned in the documentation, or at least I couldn't find if its somewhere. But when 9i has been released, I'm sure that stated explicitly that the number of segments that would be created is 10.

  However, what determines exactly how much is created in the first place? In my case, my database has 61 segments!

  But are you sure that 61 segments belong to a single undo tablespace? My best guess is that you have several Undo tablespace created and the number of segments is of each of them. Can you check and confirm please?

  I understand that the parameter UNDO_RETENTION will determin when these segments can be replaced, but I am trying to get my head round how my database has finished with 61 undo segments and will be he never ever get rid of the any of these segments? (i.e. is it just continue to add but never remove all know is that as a concept of the high water line?)

  Not to my knowledge at least. I know that the number of segments can be less than the number 10, but more which would be created at any time and that too in such a number of top, no, did not meet any reference that has never mentioned it.

  LSO a number of segments are offline - why should it be?

  Yet once, which just goes to confirm my doubt that these segments are displayed including tablespaces offline are not defined by default for your database. A tablespace can be set to the default db only its segments, and it would have also shown online. Again, check parameter undo_tablespace and see dba_rollback_segs as if the segments that are shown as online, belong only this tablespace or more.

  HTH
  Aman...

• Why import data if ready schema and index create, increase in Undo TableSpace

  I have a problem importing data.
  When I export data don't have schema import include the index schema.
  And then I import the schema ready.
  When I import data, I find this Undo TableSpace increase very fast.
  I have therefore two tests.
  1. IMPORT of data and index, every thing ok look
  2 import a schema includes index
  and then import data. Undo Tablespace very rapid increase

  If you mean undo tablespace increase in order to read consisten read.

  N ° cancel space use increases due to the DML. (requests for consistent readings read undo, they generate no cancellation to grow)

  so you're saying that redo log appear, rollback undo segment will increase.

  N ° increase in written cancellations results increase in roll forward.

  IF we import large data, we must export data with the index and import data right now

  If you import large data, you must create the indexes after the data is imported. If the index definitions are included in the export, the default behavior is that import will create them once the data is imported. To do this, undo lower for indexes.
  Note This will generate redo for the creation (but does not cancel and therefore not generate recovery for cancellation). You can avoid this by manually running CREATE INDEX... NOLOGGING - but it means you need to get and modify the scripts CREATE INDEX.

  Hemant K Collette

• Problems with UNDO tablespace

  Hello
  
  DB_VERSION: 10.2.0.4
  OS_VERSION: Windows 2003 server
  
  SQL > show Cancel parameter
  
  VALUE OF TYPE NAME
  ------------------------------------ ----------- ----------------
  UNDO_MANAGEMENT string AUTO
  UNDO_RETENTION integer 900
  undo_tablespace string UNDOTBS1
  
  I know that UNDO tablespace stores the old image of o / old value when the cancellation of the user, the old value is returned to the user throgh UNDO.
  
  
  My UNDO tablespace grows up to 24GO as a developer frequently updates the database in the morning and in the evening.
  
  Basically, it runs a script to offset that includes the INSERT and UPDATE and it is important to extermely.
  
  Whenever the UNDO SCT is full, I create a new one with autoextend on, what happens if I do not autoextend?
  
  1. what would be the impact on queries, if I do like above I always created UNDO tablespace with autoextend 2Go on.
  
  2. What is the best time to drop the old UNDO tablespace?
  
  Thanks in advance.

  Dear user12000301,

  Firstly the undo tablespace is not just there to roll back the transaction. You can use the for recovery undo tablespace (roll back during the recovery of the instance), coherent reading and also for operations of blowback.

  If you have defined a tablespace undo with the goal of conservation of 15 minutes, but have fixed size then;

  http://download.Oracle.com/docs/CD/B19306_01/server.102/b14231/undo.htm

  +"+
  + The following points explain the exact impact of the undo retention UNDO_RETENTION parameter: +.

  + The UNDO_RETENTION parameter is ignored for a fixed size undo tablespace. The database can overwrite the information to cancel remaining when the tablespace space becomes low. +

  + For a tablespace undo with the option enabled AUTOEXTEND, the database tries to honor the minimum retention specified by UNDO_RETENTION period. When space is low, instead of crushing the cancellation information remaining, the self-aggrandizing tablespace' extends. If the MAXSIZE clause is specified for an auto-croissant undo tablespace when the maximum size is reached, the database can begin to replace the cancellation information remaining. +
  +"+

  Be careful with the settings to cancel it. The size, before you add the new data files in the tablespace, undo or autoextending for your pain, you must consider the DML that caused the growing undo tablespace. Necessaryly should generate redo or cancel? If so, know the total amount of undo blocks through the relevant DML.

  If you have created a with 2 GB undo tablespace and mark as CanGrow that the data file can be up to 32 GB. The DBCA you will create a petit_fichier undo tablespace but you can create another like bigfile and pretend the tablespace default undo for the operation.

  The best time to drop an undo tablespace is to wait at least undo_retention period of time has elapsed to make sure you don't need to have the copy of the coherent image transactions are committed. I think that the solution could be achieved as underlined Chinar but be careful on the active rollback segments in your database. You can also dynamically change the default undo tablespace anytime if the database uses the spfile.

  Hope that helps.

  Ogan

• JMS store the size of the file continues to grow

  Hello

  In our production system, the file size of the JMS store continues to grow (1 GB per day and statitistics on the show file size it is linear in time, so not because of a burst of time messages).
  First we thought that this is due to unconsumed messages or transactions not recognize, but console weblogic JMS statistics view current or pending message in one of the WAD of the file (and the application logs does not trace of error).
  The only exception is some of the messages that go on a SOL JMS file without being consumed her, but it's only 2000 messages to them and which represent all together less than 10 MB, so it doesn't seem to be related (unless there is a very specific fragmentation problem that ignore us).

  In addition, we have compact the jms store files using WLST and several trips are compact in 7.1 MB:
  Before:

  -rwx - 1 webadm webgrp 1, 24 3 August 10:51 FILESTORE_CANOEJMSSERVER_1000000.DAT

  -rwx - 1 webadm webgrp 1, 24 3 August 10:53 FILESTORE_CANOEJMSSERVER_1000001.DAT

  -rwx - 1 webadm webgrp 761 M 24 August 10:54 FILESTORE_CANOEJMSSERVER_1000002.DAT

  Command:

  Java weblogic.store.Admin

  Compact - ed.

  quit smoking

  After:

  -rw - r - r - 1 webadm webgrp 7, 1 M 25 August 11:33 FILESTORE_CANOEJMSSERVER_1000000.DAT

  We also release the content of the file using wlst, and we get an xml file of 11 containing only the message in the DLQ JMS file.

  The application treats about 10,000 JMS messages every 5 minutes on both nodes of a cluster. Watch application logs that he used successfully up to approximately 150 JMS message in a second.
  The size seems to increase only on the first node (the second node jms store file size is 50 MB without be compacted, 1 MB after beeing Compact):

  -rwx - 1 webadm webgrp 54 M 24 August 10:55 FILESTORE_CANOEJMSSERVER_2000000.DAT

  We have not seen this problem on other platforms.

  We do not know whether it can have a link, but the disk partition where the Bank JMS file are is not the same on the production platform.

  If you have an idea about the source of the problem or the things we should look at to understand what is happening, it would be greatly appreciated (because the problem appeared on the production platform, we have no access directly and must apply to the intervention. Thus information on the problem is not as easy as we would like to be).

  Thank you.

  Kind regards

  Hello

  To keep this conversation updated some information.
  So we managed to avoid this problem by failing to put messages in GENERAL store (and instead of remove them). A special consumer on the file have certainly solve the problem too.
  It seems that the jms server could not reuse space of the message successfully consumed for about 10,000 are added simultanesouly (every 5 minutes) and some of the 10,000 messages (3 to be exact) are unsuccessful are wrong and go (after 3 unsuccessful attempts) in file DLQ JMS in the same jmsstore.

  Note: in this case, add a limitation on the maximum number of bytes the Server JMS or modifying synchronous write strategy does not change the behavior: the size of file storage continues to increase until the file system is full.

  [edit] I forgot to mention that we you of the different priorities of JMS to the message in the JMS file [/ Edit]

• It will frequently commit resolve ora-30036 (cannot extend the undo tablespace)

  I use 11.2.0.3 database. I confused on the use of validation to resolve ora-30036.

  I have the script in migration once that has many updates and I'm getting ORA-30036 (unable to extend segment by 4 in the "UNDOTBS" undo tablespace) .

  Our undo tablespace in NO mode autoextend and like this is just a one time event, we will not increase it.   He is currently 6 GB.

  We would commit determination ORA-30036 in my case? If not why? Is there a better solution to solve it.

  
  

  When I say commit frequent, I won't commit after each line, I just want to commit after may be million lines, so that my active cancellation extend turn into cancellation remaining will extend and Oracle will be able to use it in case of pressure of space.

  
  

  Note:

  UNDO_MANAGEMENT: AUTO

  UNDO_RETENTION: 2700

  Undo tablespace retention is NOGAURANTEE.

  I have the script in migration once that has many updates and I'm getting ORA-30036 (unable to extend segment by 4 in the "UNDOTBS" undo tablespace).

  Our undo tablespace in NO mode autoextend and like this is just a one time event, we will not increase it.   He is currently 6 GB.

  Why don't you increase it?

  You must use the correct size of UNDO necessary for the work that will be done.

  A lot of shops to create a for big lots new UNDO tablespace and then switch to it for batch processing. Once the task is completed, they switch back to the normal UNDO. That prevents the normal RETURN of autoextending far where it is normally necessary:

  ALTER SYSTEM SET UNDO_TABLESPACE

• Transaction is written to the log file and it is not written to undo tablespace. During a failure of the system how oracle rolls back the transaction.

  Hi all

  My question is:

  Transaction is written to the log file and it is not written to undo tablespace.

  During a failure of the system how oracle rolls back the transaction.

  I have already provided the answer, you ignored if well (you seem to only read the responses by people of your country).

  Redo log is always written * first * before * writing to the data block (redo log writing is much more aggressive). So it DOESN 'T MATTER if you lose these scriptures of rollback segment.

  Valuation: rear roller followed by roll forward, using redo log files and/or archive redo log files.

  Sybrand Bakker

  Senior Oracle DBA

• How to UNDO tablespace size?

  As legend. Thank you!

  An UNDO tablespace sizing requires three data items.

  (UR) UNDO_RETENTION in seconds
  (UPS) Number of undo the blocks of data generated per second
  (DBS) Overhead varies on position and size of the file (db_block_size)

  The necessary cancellation space is calculated as:

  UndoSpace = HEART * (UPS * DBS)

  read the Doc ID 262066.1 it has retail formula.

• undo_segments in the undo tablespace

  (1) at least how undo_segments in undo tablespace?

  Is optimal?
  If I increase the size of the undo tablespace, undo_segments counts also have increased!

  Version of DB is 10g

  Hello

   

  The two time oracle maintains exactly 10 segments. (you can see nom_segment begins by _SYSSMU11)

  I'm not clear on what exactly 10 segments. I have undo tablespace of ~ 250 GB with 6676 stored in dba_rollback_segs.

  3) why undo tablespace with the only spaceMo 46,8125 '?

  
  

  (4) I mean why he is stiil 450Mo undo_retention even through time or same validation has occurred?

  Just Oracle - Doc

  Once a transaction is committed, the undo data are more necessary for purposes of recovery rollback or transaction. However, for consistent read purposes, long-running queries may require old undo information to produce older images of data blocks. In addition, the success of several Oracle Flashback features can also depend on the availability of the old cancellation information. For these reasons, it is desirable to keep the old information of cancellation for as long as possible.

  Introduction to the management of the automatic cancellation

  With undo tablespace, you would see extended with the status ACTIVE, EXPIRED, extents still to RUN.

  Active cancellation extended are used by transactions and will be always active, because they are needed for the restoration.

  Extensions has expired are not used by transactions, the data contained in these extended is committed and the time UNDO_RETENTION is passed, so it is not necessary for the coherence of reading and can be reused.

  Not expired extensions are extended no assets but honor UNDO_RETENTION. Transactions belonging to these bodies of cancellation are determined, but the retention time has failed, and it may be necessary for the coherence of reading!

  Paste the query result - below

  ! undo_extent_stat.SQL more

  status of collar for a30

  Select the State,

  round (sum_bytes / (1024 * 1024), 0) like MB,.

  Tour ((sum_bytes / undo_size) * 100, 0) as PERC

  Of

  (

  Select the State, sum (bytes) sum_bytes

  of dba_undo_extents

  Status group

  ),

  (

  Select sum (a.bytes) undo_size

  from dba_tablespaces c

  Join v$ tablespace b on b.name = c.tablespace_name

  Join v$ datafile on a.ts # b.ts = #.

  where c.contents = 'UNDO '.

  and c.status = 'ONLINE '.

  );

  Anand

• Concept on Undo tablespace in RAC environment

  Why we need two different Undo tablespace for two different instances in RAC environment. What are the internal mechanisms behind it? No explanation of the concept will be great for me. What will be the scenario if we have same tablespace undo for two instances?

  Thanks in advance.

  Hello

  To reduce CONTENTION and the complexity of the software.aslo oracle instances share not undo tablespace using cancel separate increase the availability of data undo files.

  Note: all instances can still read that cancel all blocks for coherent reading purposes. In addition, any instance can update the any tablespace undo during the restoration of the transaction,

  as long as undo tablespace is not currently used by another instance to cancel generation or a recovery operation.

  HTH

  Tobi

• Need information on objects not expired undo tablespace

  We are facing a problem in our database for 3-4 days.

  The objects remaining in the database increases day after day. As our ts cancel autoextend enabled, it increases the storage space.

  Currently the following is the scenario.

  SQL > SELECT DISTINCT STATUS, SUM (BYTES) / 1024/1024/1024 GB, COUNT (*)

  2 GROUP OF DBA_UNDO_EXTENTS BY THE STATE;

  STATUS GO COUNT (*)

  --------- ---------- ----------

  61.5925903 10995 REST TO RUN

  3.33197021 356 EXPIRED

  ACTIVE 18.478515625

  Thus, the remaining data 61GB while active is only 478 MB and expired is 3.3 GB.

  My questions are

  1. How can I check the object or sql query or a program that contains the data to cancel "RUN" so. How can I find the names of these objects?

  2. If I turned off autoextend undo ts if this solves the problem and take the new space to cancel from space to cancel remaining?

  Help, please.

  1. the UNEXPIRED is not bound to a query, but the UNDO for UNDO Tablespace retention period. And the Undo retention is a value set automatically when the parameter UNDO_RETENTION is minium.

  The Oracle Documentation says:

  For an undo tablespace with the AUTOEXTEND option is enabled, the database tries to honor the specified minimum retention period by UNDO_RETENTION . When space is low, instead of crushing the cancellation information remaining, the self-aggrandizing tablespace' extends. If the MAXSIZE clause is specified for an auto-croissant undo tablespace when the maximum size is reached, the database can begin to replace the cancellation information remaining.

  2. Yes this will fix the issue that now the calcution for UNDO retention is different.