Server Administration :: Big Datafile Vs Multiple Small Datafiles

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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Delete One Datafile From Tablespace Which Contain 2 Datafiles?

Oct 29, 2008

i want to delete one datafile from tablespace witch contain 2 datafiles

i did

ALTER DATABASE DATAFILE 'ton_fichier' OFFLINE DROP;

and delete the file physiquly but i have already my datafile witch i have delete in my tablespace

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Server Administration :: Value Of Sga-target Too Small?

Jun 8, 2013

How can i increase the sga_target in this case.Im unable to create a pfile.

SQL> startup
ORA-01078: failure in processing system parameters
ORA-00821: Specified value of sga_target 2048M is too small, needs to be at least 4112M
SQL> startup nomount

[code]...

The $ORACLE_HOME/dbs location has a spfile.

more initQR01MRA1.ora
SPFILE='+DB_DATA/QR01MRA/spfile'

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Server Administration :: Pfile Very Small

Jun 26, 2011

When creating manually a pfile from an spfile

create pfile ='mypfile.ora' from spfile;

I noticed that many parameters are missing in the generated pfile, there are just some 20 parameters instead of 250 ! where are the others ?

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Server Administration :: Removing A Tablespace And Its Associated Datafiles?

Jul 12, 2010

Due to improper documentations of a certain project, I need to drop a DEFAULT tablespace of a newly created instance including it's associated datafiles by using this command:

"DROP TABLESPACE <tablespace name> INCLUDING CONTENTS AND DATAFILES;"

The default tablespace name is QWER (qwer01.dbf) and I added 2 datafiles in it, re: OPD_SML01.dbf & EXYT_SML01.dbf.

Do I have to do it online or offline?

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Server Administration :: Adding Datafiles To Tablespace

Dec 20, 2011

Can we add a datafile mapped to a shared network drive in windows server.

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Server Administration :: MR Lock / Show All Datafiles

Nov 25, 2010

Just noticed MR(media recovery lock ) in our database,further check showd all datafiles had this lock since our database was shutdown abortly but was startup gracefully.

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Server Administration :: 10g Change Disk With Datafiles

Nov 17, 2011

What is best practice to change small disk D:? I am beginner with Oracle. 10g on W2008. 5 datafiles (all indexes,second data file, 2 undotabs)*.dbf (34;30;1;34;12 GB) is on D:. Part of tablespaces (1 data, 1 undo)has files on c:.

I.
1.Shutdown 2008 server.
2.Copy D: image with GHOST to USB, network.
3.Connect new D, create RAID.
4.Restore image to D.
5.Start 2008 server.

II.
1.Stop application.
2.CONNECT AS SYSDBA
3.SHUTDOWN NORMAL or (IMMEDIATE)?
4.Copy files *.dbf at OS level from d: to ... USB disk, network.
5.Shutdown 2008 server.
6.Change disks, create RAID in BIOS.
7.Start W2008.
Is Oracle at this moment in SHUTDOWN mode?
8.Copy back *.dbf to new D: (with directory structure).
9.STARTUP Oracle.

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Server Administration :: Why 3 Mount Points For Datafiles

Feb 3, 2013

i encoutered lately on such statement:

Table D-7 shows a hierarchical file mapping of a sample OFA-compliant installation with two Oracle home directories and two databases. The database files are distributed across three mount points, /u02, /u03, and /u04. URL....

why three mount points (/u02, /u03, and /u04) for datafiles? don' understant this. isn't it better to store all datafiles in one mountpoint?

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Server Administration :: ARC File Size Too Small?

Oct 2, 2012

I noticed my DB is generating a lot of "small" .arc files and I am usure why. As you can see from the v$log query my log file size is set to 50MB. But yet BLOCKS*BLOCK_SIZE never adds up to 50MB.

Is there anything else I can look into to see how to make the .arc files larger?

SQL> select group#, thread#, bytes from v$log;
GROUP# THREAD# BYTES
---------- ---------- ----------
1 1 52428800
2 1 52428800
3 2 52428800
4 2 52428800

select blocks, block_size, blocks*block_size from v$archived_log where sequence# between 63876 and 72851 and thread# = 1

BLOCKS BLOCK_SIZE BLOCKS*BLOCK_SIZE
---------- ---------- -----------------
28 512 14336
28 512 14336
28 512 14336
55 512 28160

[code]...

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Server Administration :: Estimating Size Of Database / Datafiles

Jul 3, 2010

I have checked the space of my tablespaces/datafiles in my database. I have 8 GB space left in my database server. I cant add more hard-disk as there is no slot left. We r planning to buy a new server with latest config.

My question is, how can we know upto what size our database can increase and when a datafile need to be added in advance. Sometimes even though datafiles have space left,it shows errors abt extents cannot be extended. We have coalesce the tablespaces and added a new datafile.

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Server Administration :: RMAN Restore Failure All Datafiles

Jul 1, 2013

I am facing an issue while rebuilding a DR (Physical Standby) site using RMAN.Rman is failing to restore all the datafiles to the stanby site.

There are 403 datafiles that should be restored among which after restoring 50-60 datafiles the channel is abruptly getting terminated.Please note this exercise is not new I have done this many times (once a year after a DR testing) and the same script is being used.The rcv file is as follows

/u03/oracle/admin/mpr/scripts/dataguard/configure_dr.rcv
connect auxiliary sys/XXXX@YYY
run {
duplicate target database for standby nofilenamecheck dorecover;
}
exit
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET;
configure_dr.rcv: END
[code]....

The trace file says "krso_proc_add: Detected dead process 13828326; subsuming V$MANAGED_STANDBY slot
INFO: krsr_rfs_atc: RFS processes are temporarily disallowed"

I have also started RMAN debug tracing and the trace is also scanned as it is huge.I have seen the following in the trace error 3015 signalled during compilation..I do not find any specific oracle error to check on .

The only change that happened is that the Primary production server has been moved to a new datacentre and after its move all the connections seems to be working fine.

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Server Administration :: To Reduce Number Of Datafiles In Tablespace

Feb 25, 2012

We have two tablespace xyz_ts & pqr_ts having 167 datafiles . We have to reduce this number of files. These tablespace having 580 GB size .

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Server Administration :: Check Tables Located In Which Datafiles?

Aug 6, 2010

would want to check which tables located in which datafiles.

Tried with this command:
select B.FILE_NAME from dba_segments a, dba_data_files b
where a.header_file=b.file_ID and segment_name='TABLE_NAME'

Seems like it only shows 1 datafile. Some tables are large and i suppose it's resided in more than 1 datafile.

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Server Administration :: Recover Database With Some Datafiles And Archivelogs?

Dec 24, 2010

We have lost some datafiles and some archivelogs. We have backup of whole database taken on Dec 20 and archivelogs until Dec 23.So we dont have 1 day worth of archivelogs which can lead to incomplete recovery.

Now question is do we need to restore all datafiles or only lost datafiles for incomplete recovery since we dont have all archivelogs ? lost datafiles belong to different tablespaces.

Datafiles which are still intact are with current SCN and we restore lost datafiles only and recover unitl our last available archivelog it will have different SCN. Will we be able to open database or we need to resotre whole database for this scenario?

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Server Administration :: Rollback Segment Too Small ORA-01555

Jan 19, 2012

One of the users received the error
ora-01555: rollback segment too small

I have read about the error and saw that it is caused by transactions made upon same data, filling to maximum one of the UNDOTBS rollback segments.It happens only once in a while, each time on a different Rollback Segment.

I've read that i should do a few things to enlarge those segments, such as bring a 1. segment offline, 2. drop it and then 3. create it with a bigger size & possibly a bigger extent setting

i've also read that those actions aren't relevant if you have the parameter UNDO_MANAGEMENT set on AUTO, which is actually the case.is that why when i execute ALTER ROLLBACK SEGMENT RB_SEG_NAME_11$ OFFLINE;

1. How do i solve my issue with the Rollback segment being too small to contain the snapshot with the requested SCN?

2. what does the parameter UNDO_MANAGEMENT mean? should i change it, in order to adjust my Rollback Segments attributes, to prevent my error of re-occurring?

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Server Administration :: Find Tablespace Usage Including Datafiles

May 25, 2010

I am looking for a script to find the tbs usage including datafiles. Tablespaces Datafile Size Used Free Used% Free% Max MB

Need all the data in MB and all the datafile space in every tablespace.I have searched internet,but couldn't find this type of format.

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Server Administration :: How To Drop Datafile

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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Server Administration :: How To Drop A Datafile

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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Server Administration :: Duplicate Datafile Name

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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Server Administration :: Resize Datafile

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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Server Administration :: Move Datafile To Another Tablespace

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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Server Administration :: ORA-01157 / Cannot Identify Datafile 1

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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Server Administration :: When Did A Datafile Auto-extend

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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Server Administration :: How To Find When The Datafile Was Resized

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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Server Administration :: Move File System Datafile To ASM

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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Server Administration :: Trying To Change Tablespace And Datafile Properties On Fly

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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Server Administration :: Renaming Datafile - Change Name In OS Level Also

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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Server Administration :: How To Offline Datafile In No Archive Mode

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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Server Administration :: Find Out Used Space Of A Specific Datafile

Mar 21, 2012

post some script which will find out the used space of a specific datafile.

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