How To Shrink A Datafile
Feb 13, 2013
Database Version :11gR2
I have a tablespace which has around 32gb space consumed. But if i check the used space then its only 16GB. When i tried to resize the datafile it throws the error
ORA-03297: file contains used data beyond requested RESIZE valueAs per my understanding there are not continous blocks which are there in datafile due to fragmentation may be and there by not able to resize it. If i export the tablespace using datapump and reimport this will release the space.
But i want to know if there are any alternative ways to do the same.
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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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Aug 22, 2012
if the command is successful:>alter table my_table shrink;The segment will be defragmented and the High Water Mark will be moved.But what is the importance of the HWM?
Whats the difference between commands?
>alter table my_table shrink; -- move HWM
>alter table my_table shrink compact; -- not move HWV
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Jun 11, 2013
I am trying to Shrink Table space using the following SQl. As we are dropping large datasets. Later i am trying to shrink the table space
Alter Tablespace table_name Shrink Space Keep 20M;
Is this the best way to do in oracle 11G
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Mar 10, 2011
Well, I have a oracle database 10g and the tablespace INDX was getting up to 32 GB size. Now I added second datafile to the space, but can I shrink this space? In my view this space is responsible for indexes, right? There is a command to rebuild the indexes or there's another trick?
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Oct 2, 2013
What Influence PCTFREE on Shrink?.
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Jun 7, 2010
I have a tablespace with 5GB size, data in the tablespace is 4.8GB. if i want to shrink the tablespace then much size could be shrinked.
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Sep 26, 2011
My table can not shrink, why?
SQL> Alter Table tb_hxl_user Shrink Space Cascade;
Alter Table tb_hxl_user Shrink Space Cascade
*
ERROR at line 1:
ORA-10635: Invalid segment or tablespace type
SQL> desc tb_hxl_user;
Name Null? Type
----------------------------------------- -------- ----------------------------
STATEDATE NOT NULL DATE
USERNUMBER NOT NULL VARCHAR2(13)
PROVCODE NOT NULL NUMBER
[code]...
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Sep 4, 2012
I am trying to use shrink to reclaim space on some tables:
-First of all i am using this query to verify which tables are eligible to shrink:
select segment_owner, segment_name, segment_type,
trunc(((allocated_space)/1024)/1024) "aloc",
trunc(((used_space)/1024)/1024) "used" ,
trunc(((reclaimable_space)/1024)/1024) "reclaim"
from table(DBMS_SPACE.ASA_RECOMMENDATIONS()) where segment_owner='&owner' and segment_type='TABLE' order by reclaimable_space desc;
I'll show the toP1 below:
SEGMENT_OWNER SEGMENT_NAME SEGMENT_TYPE aloc used reclaim
-------------------------- --------------------------- ------------------ ---------------- --------
USR_CONTROLFIN CFI_PORTADOR TABLE 744 0 743
Fine, then i shrinked it:
10:06:39 brunos@gf> alter table usr_controlfin.cfi_portador enable row movement;
Table altered
Executed in 0,047 seconds
10:06:57 brunos@gf> alter table usr_controlfin.
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Jan 4, 2012
I have a table: desc STG_XML
Name Null Type
------------------------------ -------- ------------------------
ENTITY_ID NOT NULL VARCHAR2(100 CHAR)
ENTITY_TYPE_ID NOT NULL NUMBER
SOURCE_ID NOT NULL VARCHAR2(512 CHAR)
XML_SCHEMA_ID NOT NULL NUMBER
JOB_ID NOT NULL NUMBER
FINGERPRINT NOT NULL VARCHAR2(100 CHAR)
ENTITY_XML_DATA CLOB()
ARCHIVED NUMBER(1)
CREATION_DATE TIMESTAMP(6)
MODIFICATION_DATE TIMESTAMP(6)
ARCHIVING_DATE TIMESTAMP(6)
CREATED_BY VARCHAR2(50 CHAR)
MODIFIED_BY VARCHAR2(50 CHAR)
The problem is that the data of the table are 40GB while on the DB the table holds 400GB! How can I shrink and reuse that space except from drop/recreate and drop/import?
The table has no initial data, so that I can play with the INITIAL parameter. Data are inserted, updated and deleted all the time. I have run DBMS_ADVISOR which recommended to SHRINK table. I have performed the shrink :
alter table STG_XML shrink space COMPACT;
but I haven't gained any space.
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Jul 6, 2010
i am trying to shrink tablespace of 100gb which has objects.
i tried coalesce,then i try to shrink and also tried to resize the datafile with no luck
error message can't resize
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Jul 22, 2011
What is different between move table and shrink table?
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Oct 18, 2012
alter index test_idx1 shrink space;
I've heard that this statement causes a table lock but cant find any information on this.if it is so, is it a write lock or also a read lock of the table?
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Nov 4, 2013
I am trying to discern the difference between Shrink and Move and their impact on the High Water Mark of a table.
My understanding is that MOVE in effect rewrites every row of a table ( hence why it can deal with row chaining ) whereas SHRINK basically moves existing rows in a table 'down' the table into any available free space. This is why MOVE takes a table lock whereas SHRINK takes a row lock. What I am trying to discern is - does MOVE and SHRINK effect the high water mark and does both reallocate space and give it back to free space for the tablespace ? I believe MOVE does reduce the HWM and give freed space back to the tablespace. I am not so sure about SHRINK.
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Jun 27, 2013
It is not possible to run SHRINK SPACE against a table with a function based index. This is documented, and I've tested on the current release. I've reverse engineered it a bit, and the issue is in fact that you cannot SHRINK SPACE if there is an index on a virtual column:SQL> SQL> create table t1(c1 number, c2 as (c1*2)) segment creation immediate;
Table created.
SQL> alter table t1 enable row movement;
Table altered.
SQL> alter table t1 shrink space;
Table altered.
SQL> create index i1 on t1(c2);
Index created.
SQL> alter table t1 shrink space;
alter table t1 shrink space
ERROR at line 1: ORA-10631: SHRINK clause should not be specified for this object.
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Aug 3, 2009
i see in my alert.log this message:
Errors in file /oracle/BWP/saptrace/usertrace/bwp_ora_2728058.trc:
ORA-01114: IO error writing block to file 1030 (block # 602122)
ORA-27063: number of bytes read/written is incorrect
IBM AIX RISC System/6000 Error: 28: No space left on device
Additional information: -1
Additional information: 180224
But this file_id i don't have in my database, i am making these queries:
SQL> select FILE_ID from dba_temp_files order by FILE_ID;
FILE_ID
----------
1
2
3
4
5
6
7
8
9
[code]....
I don't have this file_id, why alert.log is showing me it? Of course, nobody has created this datafile and nobody has removed it too.
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Sep 4, 2013
I am using 11GR2 and looking to find out a way , where in I able to extract the data files name in such a manner , where it lists data file in order of mount points. say data1 first and then so on.. Snippet from my data files
output. /db/ptmtrain/data1/system01.dbf/db/ptmtrain/data2/sysaux01.dbf/db/ptmtrain/data1/undotbs01.dbf/db/ptmtrain/data3/tools01.dbf/db/ptmtrain/data24/users01.dbf/db/ptmtrain/data25/users02.dbf/db/ptmtrain/data26/users03.dbf/db/ptmtrain/data2/rbs01.dbf/db/ptmtrain/data3/rbs02.dbf/db/ptmtrain/data2/rbs03.dbf/db/ptmtrain/data23/sans01.dbf
should be something
like /db/ptmtrain/data1/system01.dbf/db/ptmtrain/data1/undotbs01.dbf/db/ptmtrain/data2/sysaux01.dbf/db/ptmtrain/data2/rbs03.dbf/db/ptmtrain/data2/rbs01.dbf/db/ptmtrain/data3/tools01.dbf/db/ptmtrain/data3/rbs02.dbf/db/ptmtrain/data23/sans01.dbf/db/ptmtrain/data24/users01.dbf/db/ptmtrain/data25/users02.dbf/db/ptmtrain/data26/users03.dbf
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Mar 7, 2011
In my Production DB. 5 Datafiles created in same tablespace. Datafile size is of 25GB. Data stored in all Datafile. Data is just 5GB in all datafile. I want to move data from 5 datafiles to single or couple of datafiles.
This is in Oracle 11g.
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Apr 18, 2007
I have a small problem, i will try to explain it, My tablespaces are Automatically extend datafile when full (AUTOEXTEND). It had checked "autoextend ON" checkbox.
What I need to know is, when happened that autoextend accion(day/hour), is it possible?.
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Sep 6, 2010
We have quarterly and yearly processes that deletes and updates data for millions of rows crossing different tables. To make room on the file system I would either like to remove empty datafiles (my preference) or coalesce TS to compact the data than remove the empty datafile.
Having said that, any query that can show me if a datafile has any data in it or a query that can show me whether a TS is a good candidate to be coalesced maybe a query with something displaying a percentage as to free and used extents and a YES/NO column whether to be coalesced or not.
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Mar 9, 2010
Every day we have use different data file for an external table to read from.
filename like this "filenameddmmyyyy"
Every day, I have to change name of datafile in external table script which is not a good way.
I want the automated way for external table to read the latest datafile from specified directory.
Further, there is anyway that we could know that the latest data file is available for external table.
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May 20, 2013
Suppose our database have 100 datafiles and right now rman has completed backup of 64 datafile(from file no 1 to file no 64) and in process of backup of 65 number datafile. In mean time I executed some query and it has changed the file no 55. so now my question whether rman will go and bacup this datafile(datafile no 55) again or it will leave this file as it is?
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May 13, 2013
I need to change data file path, and i got some document also but one thing confusing me, we need to offline the Tablespace, so my concern is all the table space like system, sys, user, temp etc. need to offline and then alter the database?
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Jun 18, 2013
My production DB has a couple of datafiles that were created in the wrong place, plus they are tiny - 100mb each. What is best way to get rid of them?
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Sep 19, 2012
i am working on oracle 10g windows & all my disks are full and i want to add a datafile on other computer . how can i do it ?
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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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Nov 10, 2010
I have Tow Virtual Servers (Connect As Cluster) in the Same Computer The Files In the Drive C Different (of the Tow Servers) And Others Like (e,f,q) The Same Files
And There is Database of both Servers That Have Same Name Let say orcl and both database Have same Schema let Say sch
How I can Share The Data when i am insert to table. in the schema sch in the server A i can see Same Data That I have Inserted In the Schema sch in the server B.
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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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Oct 12, 2010
How can i check for datafile corruption or a datafile error,its some tool like Linux (fsck) command in Oracle that can halp to me to chack a datafile?.
Is any way to isolate the disk region that is corrupted?
If a disk error exist an an ASM disk group how can i isolate the error from that disk group? It's an alternative different to the VALIDATE DATAFILE command in RMAN?I'm using Oracle 11GR2 on a Linux Box.
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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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