RE-Create DB ==== Datafile size

Hi all
Q1 :
I have oracle 9i DB runing on windows2000 server.
Lately we made alot of changes in the structure of tables (alter table)
90% of the tables have been altered, relations, view ..etc are altered also.
Is it better to re-create the DB ?
if yes, is it ENOUGH to export data then drop the contents of the DB then
import the dump file?
or I have to drop the whole DB ?
Q2:
for the huge tablespaces, what is the maximum size you recommend for each datafile?
thanx in advance

hi,
Q1 :I have oracle 9i DB runing on windows2000 server.
Lately we made alot of changes in the structure of tables (alter table)
90% of the tables have been altered, relations, view ..etc are altered also.
Is it better to re-create the DB ?
if yes, is it ENOUGH to export data then drop the contents of the DB then
import the dump file?
or I have to drop the whole DB ? <<
I didnt get this, if you have altered everything in your DB, then whats the point of exporting and importing the altered database. If i am wrong please elaborate your scenario.
for the huge tablespaces, what is the maximum size you recommend for each datafile?If this is a big tablespace then can have 128 TB of datafiles.
Regards
Jafar

Similar Messages

Can we decrease the datafile size in 8.1.7.4

Hello All-
I have created a sample db with table space with datafile size of 2 GB. I may be needing hundreds of mb only.It is eating up the space on unix box server.
Is there any way I can decrease the size of the datafile attached to the tablespace in Oracle 8.1.7.4.
Any help would be appreciated.
Thanks
Vidya R.

Yes you surelly can
SQL> ALTER DATABASE DATAFILE '/u02/oracle/rbdb1/stuff01.dbf'
RESIZE 100M;
Cheers !!
Jagjit

Max datafiles size

hi there,
i want to know how much is the maximum size of a datafile?
I'm using oracle 8.1.7.4 on aix 4.3.3
db_block_size=8192
i have a datafile of 2GB and i need to expand it.
I was wondering if the maximum datafile size is 2 gb, so i do not need to increase this but create e new one
thanks

Without any reference at hand, the AIX (4.3.3, JFS) limits as I can recall
File size: 2GB
File size if large files enabled: near 64GB
File system size: 64GB with std fragment size.
Also observe the ulimit of the user who is using the file system.

Actual tables size is different than tablespace,datafile size

Hi,
I had created 10 tables with minimum extents of 256M in the same tablespace. The total size was 2560M. After 3 months run, all tables sizes were not increased over 256M. But the datafile size for that tablespace was increased sharply to 20G.
I spent a lot of time on it and could not find anything wrong.
Please help.
Thanks,

The Member Feedback forum is for suggestions and feedback for OTN Developer Services. This forum is not monitored by Oracle support or product teams and so Oracle product and technology related questions will not be answered. We recommend that you post this thread to the Oracle Technology Network (OTN) > Products > Database > Database - General forum.

OS page size+datafile size

Does Windows OS page size limit in my case 4GB, has some effect on creating size of new tablespace which could be 7GB, or does better way is, to create TBS with 2 datafiles x 3,5 GB?
Does creating multiple datafiles in TBS improve performance of db?
Thanks!

Does Windows OS page size limit in my case 4GB, has
some effect on creating size of new tablespace which
could be 7GB, or does better way is, to create TBS
with 2 datafiles x 3,5 GB?r.- To avoid contention in datafiles and risks to lose information is better to create a tablespace with multiple datafiles instead of creating one with a size very large.
Does creating multiple datafiles in TBS improve
performance of db?r.- yes, you gain I/O distribution
Thanks!Joel PÃ©rez
http://www.oracle.com/technology/experts

DATAFILE SIZE를 줄이는 방법 (resize)

제품 : ORACLE SERVER
작성날짜 : 2003-01-21
DATAFILE SIZE를 줄이는 방법
=====================
PURPOSE
Explanation
기존의 datafile을 resize하여 늘리거나 줄일 수 있습니다.
datafile size를 증가하는 경우는 disk에 free space만 있다면 다음과 같이 간단합니다.
다음과 같이 늘리면 되나 줄일 경우는 계산을 하여 줄여야 합니다.
<Bulletin No: 10165> 참고
SQL>alter database datafile '/oracle/dbs/toolsORA.dbf' resize 100M;
줄이실 경우는 주의가 필요합니다. 만일 지정한 size만큼 data가 있다면
error가 발생되고 resize되지 않습니다.
SQL> alter database datafile '/oracle/dbs/toolsORA.dbf' resize 100M;
alter database datafile '/oracle/dbs/toolsORA.dbf' resize 100M'
ERROR at line 1:
ORA-03297: file contains used data beyond requested RESIZE value
방법1
1) 줄이고자하는 file id를 확인합니다.
SVRMGR> select file_id, file_name from dba_data_files;
2) 얼마를 사용했는지 확인합니다.
SVRMGR> select block_id, blocks from dba_extents
2> where file_id='FILE_ID' order by block_id;
FILE_ID 대신에 줄이려는 file id를 기술합니다.
3)현재 사용중이 db block size를 확인합니다.
SVRMGR> show parameter db_block_size
만일 2048일 경우 다음과 같이 계산합니다.
2)에서 조회된 마지막의 block_id, blocks 값을 가지고 계산합니다.
block_id * 2048 + blocks * 2048 의 결과에 한 block더한 값만큼만 줄이는
것이 가능합니다.
만일 마지막으로 조회된 값이 block_id가 578261, blocks가 515일 경우
578261*2048 + 515*2048 =1185333248로 최소한 1.2GB이상은 써야 합니다.
4) 실제 datafile을 줄입니다.
svrmgr>alter database datafile '/oracle/dbs/toolsORA.dbf' resize
1200M;
방법 2
1) 기존의 data export
exp username/password file=filename owner=username log=username.log
2) tablespace drop
svrmgr>drop tablespace tbs including contents;
rm datafile
tbs대신에 작게 만드시려는 tablespace name을 기술합니다.
datafile대신에 tablespace와 연계된 모든 datafile을 remove합니다.
3) tablespace재생성
svrmgr>create tablespace tbs
datafile '...' size 100M;
원하시는 size로 줄입니다.
4) data import
imp username/password file=filename fromuser=username touser=username
commit=y log=imp.log
Example
Reference Documents
-------------------

제품 : ORACLE SERVER
작성날짜 : 2003-01-21
DATAFILE SIZE를 줄이는 방법
=====================
PURPOSE
Explanation
기존의 datafile을 resize하여 늘리거나 줄일 수 있습니다.
datafile size를 증가하는 경우는 disk에 free space만 있다면 다음과 같이 간단합니다.
다음과 같이 늘리면 되나 줄일 경우는 계산을 하여 줄여야 합니다.
<Bulletin No: 10165> 참고
SQL>alter database datafile '/oracle/dbs/toolsORA.dbf' resize 100M;
줄이실 경우는 주의가 필요합니다. 만일 지정한 size만큼 data가 있다면
error가 발생되고 resize되지 않습니다.
SQL> alter database datafile '/oracle/dbs/toolsORA.dbf' resize 100M;
alter database datafile '/oracle/dbs/toolsORA.dbf' resize 100M'
ERROR at line 1:
ORA-03297: file contains used data beyond requested RESIZE value
방법1
1) 줄이고자하는 file id를 확인합니다.
SVRMGR> select file_id, file_name from dba_data_files;
2) 얼마를 사용했는지 확인합니다.
SVRMGR> select block_id, blocks from dba_extents
2> where file_id='FILE_ID' order by block_id;
FILE_ID 대신에 줄이려는 file id를 기술합니다.
3)현재 사용중이 db block size를 확인합니다.
SVRMGR> show parameter db_block_size
만일 2048일 경우 다음과 같이 계산합니다.
2)에서 조회된 마지막의 block_id, blocks 값을 가지고 계산합니다.
block_id * 2048 + blocks * 2048 의 결과에 한 block더한 값만큼만 줄이는
것이 가능합니다.
만일 마지막으로 조회된 값이 block_id가 578261, blocks가 515일 경우
578261*2048 + 515*2048 =1185333248로 최소한 1.2GB이상은 써야 합니다.
4) 실제 datafile을 줄입니다.
svrmgr>alter database datafile '/oracle/dbs/toolsORA.dbf' resize
1200M;
방법 2
1) 기존의 data export
exp username/password file=filename owner=username log=username.log
2) tablespace drop
svrmgr>drop tablespace tbs including contents;
rm datafile
tbs대신에 작게 만드시려는 tablespace name을 기술합니다.
datafile대신에 tablespace와 연계된 모든 datafile을 remove합니다.
3) tablespace재생성
svrmgr>create tablespace tbs
datafile '...' size 100M;
원하시는 size로 줄입니다.
4) data import
imp username/password file=filename fromuser=username touser=username
commit=y log=imp.log
Example
Reference Documents
-------------------

Datafile size minor than 4 Gb: is this a bug?

Hi all! I have a tablespace made up by 1 datafile (size = 4 Gb). Oracle 9.2.0.4.0 (on Win2k server) seems incapable of managing this; in fact, I receive ora-04031: unable to allocate 8192 bytes of shared memory but the memory of Oracle is configured correctly. Resizing this tablespace and adding a new datafile so that every datafile is 2 Gb large, I don't receive the error any longer. what do you think about this?
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Hello everybody;
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If your problem is solved please click the "Accept as Solution" button ------------V
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Maximum datafile size for sqlloader

Hi,
I would like to load data from 4GB xls file into oracle database by using sql*loader. Could you please tell me the maximum datafile size that can support sql*loader?
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Edited by: user12052260 on Jul 2, 2011 6:11 PM

I would like to load data from 4GB xls file into oracle database by using sql*loader. Could you please tell me the maximum datafile size that can support sql*loader?you can post this question in SQL loader forum questions. CLose the thread here.
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HI
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I would like to load datafile from xls file which nearly 5 gb into oracle table by using sql*loader. Could you please tell me how much is max datafile size we can load by using sql*loader?
Thanks
VAMSHI

Hello,
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Tcode for creating new page size in smart forms

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How to shrink the system tablespace datafile Size

iam using oracle 9i R2 and i want to reduce my datafile size but it's show's that error when i try to resize it. ORA-03297

Hi,
We can directly resize datafilesTEST.SQL>SELECT FILE_NAME, BYTES FROM DBA_DATA_FILES WHERE TABLESPACE_NAME='SYSTEM';
FILE_NAME
     BYTES
/.../dbsGNX.dbf
419430400
TEST.SQL>ALTER DATABASE DATAFILE '/.../dbsGNX.dbf' RESIZE 390M;
Database altered.
TEST.SQL>SELECT FILE_NAME, BYTES FROM DBA_DATA_FILES WHERE TABLESPACE_NAME='SYSTEM';
FILE_NAME
     BYTES
/.../dbsGNX.dbf
408944640But the minimum file size is the size of the extend the furthest in the datafile:TEST.SQL>SELECT FILE_ID,FILE_NAME FROM DBA_DATA_FILES WHERE TABLESPACE_NAME='SYSTEM';
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FILE_NAME
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/.../dbsGNX.dbf
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SEGMENT_NAME                                                                      OWNER                          SEGMENT_TYPE
I_OBJAUTH2                                                                        SYS                            INDEX
TEST.SQL>SHOW PARAMETER BLOCK_SIZE
NAME                                 TYPE                             VALUE
db_block_size                        integer                          8192
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8192*25129
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Regards,
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RE-Create DB ==== Datafile size

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