Server Administration :: How To Reclaim Space After Deleting A Data File

Jun 30, 2010

i have a tablespace with a datafile of 20g. now by mistake i delete the datafile and then try to delete the tablespace from EM but i got an error which says that data file is not present to delete

Now initially after deleting the file physically so then i check space by applying df -ah at os lvl so it didn't reclaim the space now i try to delete the tablespace from em so it gives me the above error. This might be due to tablespace existence. so how can i reclaim the space.

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Server Administration :: How To Reclaim Wasted Space Thoroughly

Mar 26, 2013

In one of our Data warehousing DB, even though, all the tablespaces' space should keep on at least 1 month, but our leader want us to estimate how much space can free up with db method.

I have referenced

<Administrator Guide> - Reclaiming Wasted Space


I have several questions on reclaim space:

1. It seems that segment adviser give a really cool view to know which segment should be shrink and how much size will free up after shrink. But actually, this need a very a job or manually do this. I have once heard about some query from can estimate this :

A script from MOS, but actually I found this it's not very accurate with segment adviser. This script should report the real space the table occupy, but after shrink space, the space doesn't free up.

SELECT TABLE_NAME , (BLOCKS *8192 / 1024/1024 ) - (NUM_ROWS*AVG_ROW_LEN/1024/1024)
"Data lower than HWM in MB" FROM DBA_TABLES WHERE UPPER(owner) =UPPER('&OWNER') order by 2 desc;

Also there is a script evaluate the tablespace fragments from some people:

SELECT tablespace_name,
SQRT (MAX (blocks) / SUM (blocks))
* (100 / SQRT (SQRT (COUNT (blocks))))
FROM dba_free_space
GROUP BY tablespace_name

if the value is very low, we can coalesce the tablespace. But after I coalesce the tablespace, I can't see any space free up.

From <Concepts>:
Quote:Coalescing extents is not necessary in
locally managed tablespaces, because all contiguous free space is available for
allocation to a new extent regardless of whether it was reclaimed from one or more

2. is there any good way to estimate how much space we should free up? ( After free up the space , dba_free_space should see this result)

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Server Administration :: Disk Space When Add Data File On Primary Database?

Jun 24, 2013

I'm new into Oracle, consider the below scenario and respond it accordingly.

I want to add 500GB data file at primary database side, but doesn't have space at standby database side. My STANDBY_FILE_MANAGEMENT is set to Auto.

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LOB - Storage - Reclaim Space In Database?

Jan 5, 2008

I am having an issue with the LOBs in our Database. Our production DB is about 71G right now - if i do export/import using the DataPump - I see the data volume becomes 40G. I am sure its because of the LOBs in my Database. Our application uses lots of LOB datatype and I think the space is not being released.

The challenge is I cant do a full export/import in my Production DB as its a 24/7 system and to do export/import I need min. 5 hrs - which my business will not permit. I can I claim the unused space here. I have used Segment Advisor - but it has only given me 6G of space gain.

Is there any script I can try to use to reclaim space in the database.

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Use Shrink To Reclaim Space On Some Tables

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:

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

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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SQL & PL/SQL :: Drop Schema And Reclaim Disk Space?

Jun 29, 2011

I need to drop one of the schema with 700 tables. There are other schemas in same database and tablespaces are shared across.

How can I reclaim the disk space after dropping the particular schema?

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Server Administration :: How To Reclaim Temp Free Blocks

Jul 26, 2011

we have 5 tempfile ( each of 65 gb ) allocated to TEMP tablespace...and still we are running in short of space..when i checked the TEMP segment usage, i am able to see much FREE blocks. how to release those space ?

------------ ---------- ------------------------------------------- ----------
TEMP 1 +DATA/tedw/tempfile/temp.3043.727779755 65535.9688
TEMP 2 +DATA/tedw/tempfile/temp.3042.727779749 65535.9688
TEMP 3 +DATA/tedw/tempfile/temp.3041.727779741 65535.9688
TEMP 4 +DATA/tedw/tempfile/temp.4065.730387401 65535.9688
TEMP 5 +DATA/tedw/tempfile/temp.4075.731586241 65535.9688SELECT tablespace_name,
total_blocks*16/1024 as total_MB,
used_blocks*16/1024 as used_MB,
free_blocks*16/1024 as free_MB
FROM v$sort_segment;

------------ ------------ ----------- ----------- ---------- ---------- ----------
TEMP 9994624 1007360 8987264 156166 15740 140426

1 row selected.
further when i checked the session details using TEMP segment, i got below output:

SELECT b.tablespace, b.segfile#, b.segblk#, b.blocks, a.sid, a.serial#,a.username, a.osuser, a.status
FROM v$session a,v$sort_usage b
WHERE a.saddr = b.session_addr
ORDER BY b.tablespace, b.segfile#, b.segblk#, b.blocks;

------------------------------- ---------- ---------- ---------- ---------- ---------- ------------------------------ ------------------------------ --------
TEMP 15001 3549184 576 475 1237 EQUIPMENT infa ACTIVE
TEMP 15001 4002368 64 796 4677 CRM infa ACTIVE
TEMP 15002 580608 20352 868 615 EDW infa ACTIVE
TEMP 15002 3962112 832 92 1065 EDWSTG infa ACTIVE
TEMP 15002 4021120 576 1236 7257 EQUIPMENT infa ACTIVE
TEMP 15003 23936 64 819 5586 EDW infa ACTIVE
TEMP 15003 3798400 832 855 1801 EDWSTG infa ACTIVE
TEMP 15004 205056 21632 795 8171 EDW infa ACTIVE
TEMP 15004 4031488 832 403 1299 EDWSTG infa ACTIVE
TEMP 15004 4131456 576 19 6802 EQUIPMENT infa ACTIVE
TEMP 15005 3617856 832 1166 6204 EDWSTG infa ACTIVE
TEMP 15005 3741760 576 862 953 EQUIPMENT infa ACTIVE
TEMP 15005 4042752 18176 1226 5379 CDM infa ACTIVE

3 rows selected.
if i killed the SID - 1226, then those temp blocks ( 18176 blocks ) will be released and can other session use that space further ?

there is one more column - SEGBLK#
explain what is the exact meaning of this column ?

to reclaim the space, should i issue below command -
sql>alter tablespace TEMP coalesce;

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Server Administration :: Running Out Of Space For Archive File System

Apr 2, 2012

In normal days size of archives generated in a day is 14-15GB. But since yesterday morning, almost 150GB of archives have been generated and are still getting generated(200MB every 1-2 minutes).

There was a sudden reboot of server yesterday morning. At that time there was heavy load of transactions on database. Can it be a reason that smon is still doing recovery? (I am not sure on this). Also, Undo tablespace is increased from 18 GB to 50 GB since yesterday (autoextend on).

Now we are running out of space for archive file system (can't delete them also until they are transferred to DR) Size of redo log is 200MB. This database supports around 2500 users.

performance wise I don't see any hit. Also wait events are normal. (only few db file sequential read) finding the query/session which are causing this much huge amount of archives?

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Server Administration :: Any Relation Of Tablespace Disk Space And Actual Data Present In Tables

Aug 16, 2012

We are using Oracle 10g and have 10 tablespaces defined for our Database which have 108 tables. Size of 108 tables is around 251 MB as seen during importing the dump. While creating these 10 tablespaces I used below parameters for allocation of space


which set the initial space for 10 tablespaces to around 1032Kb each. Now my Question is after importing the dump , how the disk space for 10 tablespaces increases to 398 MB in total ?

Is there any relation of Tablespace disk space and Actual Data present in the tables ?

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Forms :: Deleting Uploaded File From Server?

Oct 11, 2010

We uploaded files to application server,using webutil_file_transfer.client_to_as_with_progress Now, we want to delete the file through forms, when user click a button.

we tried this,using HOST command.

CURSOR c_path
SELECT attachpath
WHERE apid = :parameter.apid;


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Server Administration :: Deleting Archive Log In DR

Mar 6, 2012

I have a small question to be clarified. Is there any way to find out the "Applied Archive log files" in DR and "Deleting them through .

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Server Administration :: ORA-01111 / Name For Data File 636 Is Unknown - Rename To Correct File

Nov 3, 2012

i have two tablespaces dictionary managed (SYSTEM,APPLSYSX) i tried to change to locally cause it will cause problem in future when trying to run OATM migration.i did it successfully on APPLSYSX,when i did it on system upon oracle procedure.i have to change all tablespaces to read only when i did that with tablespace APPLSYSD(alter tablespace APPLSYSD read only) i received errors

SQL> alter tablespace APPLSYSD READ ONLY;
alter tablespace APPLSYSD READ ONLY
ERROR at line 1:
ORA-01230: cannot make read only - file 636 is offline
ORA-01111: name for data file 636 is unknown - rename to correct file
ORA-01110: data file 636: '/vol5u/oracle/prddb/9.2.0/dbs/MISSING00636'
i have not this file on the OS

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Server Administration :: Deleting Unwanted SYS Schema Objects?

May 25, 2011

I was importing one schema from Oracle 10g to 11g using traditional import. I imported as a SYS user, so all the objects created in SYS schema. how can I remove these objects and retain only default SYS objects

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Server Administration :: What Can Be Maximum Size Of Data File

Nov 24, 2011

I am having I/O issues if i create 20 GB DATAFILES on SMALL TABLE SPACE. guide me with the maximum size limit of data file that I can create in Windows 2003 32 bit server.

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Server Administration :: Data File / Table Relation

Feb 25, 2011

I have 2 schemas in my database with over 500 tables in each.i am trying to know which tables actually belong to which datafile in which tablespace.

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Server Administration :: ORA-01157 / Cannot Identify / Lock Data File 201

Aug 12, 2013

Our server got crash in server1 and we recovered the same DB to server2 using RMAN back up. But while running our scheduler for email alert we got the error message as ORA-01157: cannot identify/lock data file 201 - see DBWR trace file ORA-01110: data file 201: 'D:ORADATAKFDBTEMP01.DBF' Our temp file is already in E folder.

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Server Administration :: Location Of Table In Tablespace / Data File

Jul 6, 2010

I was wondering if there is any way to know in which Tablespace and Datafile my Table is located. I have exported a table and about to delete it as i am partitioning it.

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Server Administration :: Database File System Architecture For Data Warehouseing Application

Mar 14, 2011

Which is the best possible way of configuring the Physical file structure in case of Data Warehouseing application?

I mean to ask you Multiplexing of the data file or control file is required. Or any best possible way to configure Physical file structure.

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Server Administration :: RBS Tablespace Is Not Releasing Space

Aug 27, 2012

In My database rollback segment space is not releasing space even though, there is no transaction is using RBS. RBS tablespace size is around 70GB. Unfortunately still our environment is running in 9i due to application code

SQL> show parameter undo

------------------------------------ ----------- ------------------------------
undo_management string MANUAL
undo_retention integer 1800
undo_suppress_errors boolean FALSE

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Server Administration :: Calculate Used Space In A Block

Nov 17, 2011

Is there any way I can calculate percentage of space used in a block.Eg if a table size is 100 blocks,How Can I check the percentage of used space in block.

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Server Administration :: How To Know Which Block Contains Free Space

Feb 26, 2013

for some reason,i want to know which data block contains free space,or which table/index contains free space.

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Server Administration :: Segment Space Management?

Oct 13, 2010

am using Oracle 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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Server Administration :: Managing Space In Drive E

Oct 27, 2010

In my drive E: I'll have a space issue soon because one file is taking all space. SYSTEM01. DBF size is around 25GB. I want to know if I delete some data in my database I'll gain space.

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Server Administration :: Verify Tablespace Space

Jan 9, 2012

Application team requested hosting team to add some space to tablespace as it was exceeding 80% used.Now the hosting team have added the space as per recommendation and the application team wants us to verify if the space was added. How to check the space was added in GB to list of tablesapces ?

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Server Administration :: Pre-allocate Space For Temporary Tablespace?

Jan 4, 2012

I just want to know whether we have to pre-allocate space for temporary tablespaces?

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Server Administration :: How To Delete Flashback Log And Release Space

Feb 15, 2012

How to delete flashback log and to release the space?

I guess that it maybe like archive log ,it can release the space using RMAN.But when i try a test ,it fail.


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Server Administration :: Free Space In Standby Database?

Jul 23, 2011

How do we find the free space in tablespaces in a standby database

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Server Administration :: System And Users Table Space

Oct 15, 2011

a newbie dba here..

sum(BYTES) Total_free_space,
max(BYTES) largest_free_extent
from dba_free_space

result output is attached .txt file.

the SYSTEM & USERS table space shows only <10 mb free space. Is it a bad sign? What I should do ?

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Server Administration :: Recover Space After Index Rebuild?

Apr 26, 2011

We have separate tablespaces for Tables and Indexes. Also Temp is in different temporary tablespace and UNDO also in UNDO tablespace and Index tablespace contains only Indexes. The tablespace usage for tables is 80% and Index is 91%.There is not enough disk space to allocate for the datafile on our system. I ran a rebuild on one of the Index but now notice the Index tablespace is 98% used soon after the rebuild finished.

How can i free up space for Index tablespace and why does the size of Index tablespace increased after the rebuild.

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Server Administration :: Segment Space Management Is Auto?

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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