Server Administration :: Space Management - Unable To Resize Datafile?
Feb 13, 2013
I have one generic question about space management. I have one table with size of 1TB. This table stored in ORC1 tablespace. This tablespace contains 70 datafiles.
Since it's 10.2.0.4 database. I have dropped this table by using purge
drop table <<table_name>> purge;
Once table drop was completed. When I check the tablespace space it was 100% free but due to HWM was unable to resize the datafile from current size to small size. What was the reason behind this. Is there any process needs to follow when dropping big tables ? like instead of dropping the tables do I need to truncate first & then drop .
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Mar 21, 2011
Today i am facing an error when going to rezise the datafile its fixed size is 19000M abut after truncating all tables it is 112M, but when i am going to resize its datafile to 500M its get me an error ora-03297 file contain used data beyond requested size values.
I have done the same before a week without any error.But this time i got the error
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Oct 13, 2010
am using Oracle 10.2.0.4 on win 2008 server SP2. I would like to know if we can set the Segment Space Management feature to AUTO for RBS and Temporary tablespaces. As the data is not permanent in these tablespaces, will it manage automatically?
Presently its Segment Space Mgmt is manual for System, RBS, Temporary tablespaces.
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Oct 18, 2010
the syntax to make a tablespace's segment space mnagement auto which is segement management is *manual* and exent management is *local autoallocate*.
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Mar 21, 2012
post some script which will find out the used space of a specific datafile.
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Jun 10, 2013
I have one tablespace called U01. This tablepspace contains 31 data files. Due to high water mark I was unable to most datafiles. Since my database running onair application they will not provide me downtime to move the tables. Is there anyway to fix the high water mark without getting downtime window? almost 700+g space unused. I need to reuse them asap because running out of space with in asm diskgroup.
SQL> SELECT A.TABLESPACE_NAME,round(SUM(A.TOTS)/1024/1024) "Tot size MB",
2 round(SUM(A.SUMB)/1024/1024) "Tot Free MB",
3 round(SUM(A.SUMB)*100/SUM(A.TOTS)) "%FREE",
100-round(SUM(A.SUMB)*100/SUM(A.TOTS)) "%USED",
round(SUM(A.LARGEST)/1024/1024) MAX_FREE,SUM(A.CHUNKS) CHUNKS_FREE
4 5 6 FROM (
7 SELECT TABLESPACE_NAME,0 TOTS,SUM(BYTES) SUMB,
[code]...
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Jul 28, 2011
I need to resize my datafile as i have allocated more space and need to reduce ( i.e.data load completed now). my tablespace is having 11.74 gb free space now. it has 3 datafile.
TABLESPACE TOTAL USED FREE PCT_FREE LARGEST FRAGMENTS
------------------------ ---------- ---------- ---------- ---------- ---------- ----------
CFC_DATA 150528 138780.6 11747.4 7.80412946 1251 992
TABLESPACE_NAME FILE_ID FILE_NAME Size(MB)
------------------ ---------- ------------------------------------------------------- ----------
CFC_DATA 71 +DATA/dedw/datafile/cfc_data.4074.731085435 65535.9688
CFC_DATA 334 +DATA/dedw/datafile/cfc_data.4473.757566557 20480
CFC_DATA 1710 +DATA/dedw/datafile/cfc_data.2012.728095695 64512I used below script to find out HWM in order to resize the datafile.
db_block_size is 16KB.
[code]....
in TOAD, we have an option, that is "Minimum size" button against each datafile.. Need the SQL which is running behind when we press this button from TOAD ?
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Sep 15, 2012
We are in the process of gaining some space in our database. We identified a tablespace that occupied around 400GB of space. The datas are required for us. Hence, we truncated (with drop storage) the tables, gathered statistics and shrinked the tables. After doing that we found the datafile occupied around 32GB of space. We tried to resize it to 5 GB and we got "ORA-03297: file contains used data beyond requested RESIZE value". We could see that size in dba_free_space against that tablespace. We would like to give back everything to OS.
We also tried exporting the tablespace without rows, dropped the tablespace and re-created and imported again. But the datafile grows to around 32G and we are unable to resize it.
We are sure that the tablespace has only the table definitions without data. But we do not know why is it occupying around 32G of space and we could see that size in dba_free_space. We would like to give back everything to OS. How can we do that?
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Sep 19, 2012
I've been ASM quite a while. I've two diskgroups extdg and nordg which are of external and normal redundancy respectively. Total diskgroup size is 9G, usuable space came down to 3mb when i tried to resize it to itz maximum. the value under usable column shows the same.
FYI... i've totally three disks in nordg, two in one failgroup and one in another.The disk sized equally 3g each.
Quote:
NAME TOTAL_MB FREE_MB USABLE_FILE_MB
------------------------------ ---------- ---------- --------------
EXTDG 2047 1995 1995
NORDG 9201 3073 3
The command i used to resize all disk to their max is Quote:SQL> alter diskgroup nordg resize all size 3067M;
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Jun 30, 2010
i got a error temp tablespace cannot be resized. How to Resize Temp Tablespace?
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Dec 23, 2012
My system tablespace size is 800mb and it sends an alert saying that it has exceeded 80% of its usage.However its total max size is 30gb.
FYI
Its autoextensible is set to 'YES'.
2 Node RAC database.
File system is ASM
My question here is... is it advicable to resize a system tablespace to some size when autoextensible is set to 'YES'
or genrally can we resize a system tablespace when autoextensible is set to 'No' ?
SQL> col FILE_NAME format a40
SQL> /
FILE_NAME BYTES/1024/1024 AUT MAXBYTES/1024/1024
---------------------------------------- --------------- --- ------------------
+DATA/ge01114/datafile/system.556.2254454 800 YES 30000.9844
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Jul 30, 2013
Version: 10.2, 11.2Platform : Unix, Linux flavours
Question1. From googling , I gather that ASSM ( Automatic Segment Space Management ) is a new method used by Oracle to manage space inside data block. If this is the case, then it should have been named 'Automatic Block Space management' . Right ?
Question2.What was the most notable advantage in your opinion in using ASSM as opposed Manual Segment space management ?
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May 25, 2012
I can not drop datafile in a tablespace, how can i do?
SQL> Alter Database Datafile '/u02/app/oracle/oradata/oracl/hxl06.dbf'
Offline 2
3 /
Database altered.
SQL> Alter Tablespace tps_hxl
Drop Datafile '/u02/app/oracle/oradata/oracl/hxl06.dbf'; 2
Alter Tablespace tps_hxl
*
ERROR at line 1:
ORA-03264: cannot drop offline datafile of locally managed tablespace
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Dec 31, 2011
How to drop a datafile of tablespace.
SQL> alter database datafile '/u01/app/oracle/oradata/oracl/hxl01.dbf' offline drop;
Database altered.The command success,but the dic view show the datafile also.
SQL> select file_name,tablespace_name from dba_data_files;
FILE_NAME TABLESPACE_NAME
--------------------------------------------- ------------------------------
/u01/app/oracle/oradata/oracl/users01.dbf USERS
/u01/app/oracle/oradata/oracl/sysaux01.dbf SYSAUX
/u01/app/oracle/oradata/oracl/undotbs01.dbf UNDOTBS1
/u01/app/oracle/oradata/oracl/system01.dbf SYSTEM
/u01/app/oracle/oradata/oracl/hxl02.dbf TPS_TEST
/u01/app/oracle/oradata/oracl/hxl01.dbf TPS_TEST
6 rows selected.
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Feb 29, 2012
I have oracle 10g running on Solaris with file system and some one created database files with same name but in different directories for example data01.dbf in two different directories, say /u01/oradata/data01.dbf and /u02/oradata/data01.dbf. Now, I want to find out the duplicate datafiles (data01.dbf in this case) sitting in different directories, is there anyway to find this out?
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Apr 7, 2013
I have read this article:
[URL].........
And i see:
Quote:
If MEMORY_TARGET is set to non zero value:
SGA_TARGET, SGA_MAX_SIZE and PGA_AGGREGATE_TARGET are set to 0, 60% of memory mentioned in MEMORY_TARGET is allocated to SGA and rest 40% is kept for PGA.
So, I have set:
alter system set sga_target=0 scope=spfile;
alter system set pga_aggregate_target=0 scope=spfile;
alter system set sga_max_size=0 scope=spfile;
alter system set memory_max_target=512M scope=spfile;
alter system set memory_target=300M scope=spfile;
, and then bounced the instance.
After startup, I see:
SQL> startup
ORACLE instance started.
Total System Global Area 272027648 bytes
Fixed Size 1384012 bytes
Variable Size 100663732 bytes
Database Buffers 163577856 bytes
Redo Buffers 6402048 bytes
Database mounted.
Database opened.
SQL>
But Total System Global Area should't be in that case 60% of memory mentioned in MEMORY_TARGET? Memory mentioned in MEMORY_TARGET was 300M, and 60% of 300M is 180M, which is not 272027648 bytes.
I just want to use automatic memory management, so I've set the other parameters above to 0. My instance is on my local machine, so just for my own personal use.
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Feb 16, 2012
Erroneously created datafile, re: "/path/../large_rbs_03.dbf" was created under the SYSTEM tablespace which is supposedly be in the LARGE_RBS tablespace.
How do I make the said datafile be under LARGE_RBS?
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Jun 28, 2010
I have a database of branch A whose files are located in E: Drive. I want to download it in branch B.I placed all the files of Branch A in D: Drive of Branch B. When i start the database i was getting controlfle error. I made required corrections in initorcl.ora. Now when i start the Database,its mounted, but I am getting ORA-01157: Cannot identify datafile 1. I tried to rename the file, but the "alter database rename file1 to file2;" option is not working.
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Dec 21, 2010
Is there a way to find out when a datafile for an undo tablespace with autoextend enabled actually extended? I've done a few tests, and nothing is written to the alert log or any trace file that I've found. I can't find any V$ or DBA view that will give me the history of a file's size.
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Jan 17, 2012
We need to find when any datafile was resized ( if at all)in a tablespace. Actually, by noting the created date from v$datafile , we used to know the data growth in a tablespace. Now as the number of datafiles have increased, we want to resize them. This diagnostinc have to be done without changing/adding anything in DB.
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Jul 31, 2010
I have been reading various articles about the undo management. This basic concept of undo management is simple but how oracle implements it is bit harder for me to grasp.
What i have read and understood is that whenever a DML(Update, Delete, Insert) statement is issued by a user, the data is fetched from datafile to database buffer cache and at the same time a copy of the original data is saved in undo segment. Now if other users requests the same data, they are presented with the unchanged copy in the undo segment.
Now I have the following questions:
1) In case of Insert statement, what data is saved in undo segment. Is it the complete data in the table to which we want to insert the new row?
2)When the user issues DML statement, there are three copies of the same data, one in Memory (which is changed and not the same as original data), second in Undo segment (Which is unchanged copy of original data) and third in datafile file ( which is original data). What is the difference in the data in undo segment and data in datafile at this stage. Why are the other users presented with the data from undo segment rather than original data from the datafile to maintain read consistency.
3)When the user issues rollback, the changes made to the copy of data in memory are undone.The copies of data in memory and undo segment are now same?. What happens to the before change copy in undo segment. Is it still there or deleted.
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Jan 5, 2012
I have some table spaces manual and others automatic, i just want to know what's the recommended one, to change it to the best way.
How to change Segment Space Management of a tablespace from MANUAL to AUTO? in oracle 10g R2 and also want to know the main difference between Manaul and Automatic Segment Space Management.
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Oct 23, 2012
I mistakenly added a datafile to a tablespace which is asm, however the datafile was created in a default location and not the asm location:
alter tablespace pdaiidata1 add datafile '<filename>' size 2048M;
What I should have done:
alter tablepsace <tablespace_name> add datafile '+DATA1' size 2048M;
Is there any way to move this filesystem datafile into the asm tablespace? In previous Oracle versions, I've taken a tablespace offline, moved a datafile, renamed it, then brought the tablespace back online. Can I do something similar here in this situation?
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Aug 21, 2011
This facility has one last 10g database and a very problematic tablespace and last datafile associated with it. The tablespace was set up with INITIAL_ EXTENT of 131,072 (128K) instead of the more 'normal' 4,194,304 (4M) and NEXT_EXTENT of 262,144 (256K) instead of 4,194,304 (4M).
More worryingly, the datafile has INCREMENT_BY set to 1 (8K) instead of 1,280 (10M) or 2,048 (16M).Has anyone ever updated sys.ts$.dflinit and sys.ts$. dflincr to modify the INITIAL_EXTENT and NEXT_EXTENT, and sys.file$.inc to modify the INCREMENT_BY?
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Nov 3, 2012
While renaming the datafile.
1) ALTER TABLESPACE .... OFFLINE;
2) CHANGING THE DATAFILE NAME IN OS LEVEL;
3) ALTER TABLESPACE .... RENAME DATAFILE 'FILE_OLD' TO 'FILE_NEW';
4) ALTER TABLESPACE .... ONLINE;
In the above steps, I HAD FORGOTTON TO FOLLOW THE 2ND STEP.
At the step of 3rd, i got error message, now i am not able to change the name in OS level Also.
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Oct 31, 2011
I want to drop a datafile in my test db which is in no archive mode,at first, i want to offline the datafile,but it failed,is there any way to do it?
SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 3237
[code].......
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Jun 17, 2010
what's the difference between having BIG datafile (32GB) vs many small datafiles (4GB) replacing a Big one.
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Dec 21, 2010
I want to create system table space's extent management dictionary with the syntax:
CODEcreate database
logfile
group 1 ('/u01/app/oradata/anand/redo1a.log') size 100M,
group 2 ('/u01/app/oradata/anand/redo2a.log') size 100M,
group 3 ('/u01/app/oradata/anand/redo3a.log') size 100M
datafile '/u01/app/oradata/anand/system.dbf' size 400M extent management dictionary
sysaux datafile '/u01/app/oradata/anand/sysaux.dbf' size 300M
default temporary tablespace temp tempfile '/u01/app/oradata/anand/temp.dbf' size 50M
but it is giving error
ERROR at line 6:
ORA-25141: invalid EXTENT MANAGEMENT clause
how can I make system tablespace's extent management dictionary?
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Mar 6, 2011
I have create one table emp under scott schema, and this schemas default tablespace is USERS and this tablespace has 3 datafiles.
Now how do I identify the object EMP is residing on which datafile in USERS tablespace?
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Dec 29, 2011
when i make a datafile offline,can i add the following option: normal or immediate?
such as like here:
SQL> ALTER DATABASE DATAFILE 5 OFFLINE NORMAL;
OR
SQL> ALTER DATABASE DATAFILE 5 ONLINE IMMEDIATE;
when i try a test ,it occurs an error:ORA-00933.
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