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  #1 (permalink)  
Old 09-07-10, 08:24
FoKwame FoKwame is offline
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How large can a Datafile be??

Dear Support,

I would like to seek some clarifications as a matter of urgency:

Database version is Oracle 10gR2 (10.2.0.1.0)
and Server is Windows Server 2003 R2

The issues I seek clarification on are:

1. How large can my datafiles be (can it be greater than 2GB )

2. Can a datafile that is not configured to Auto extend be Redone to Enable autoextend after it has reached 2GB?
If so, how can it be done?
3. Does windows platform has any limitations on Datafile size and autoextend enabled?

Any assistance is very much welcome
FoKwame
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Old 09-07-10, 08:29
FoKwame FoKwame is offline
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How large can a Datafile be??

Dear Support,

I would like to seek some clarifications as a matter of urgency:

Database version is Oracle 10gR2 (10.2.0.1.0)
and Server is Windows Server 2003 R2

The issues I seek clarification on are:

1. How large can my datafiles be (can it be greater than 2GB )

2. Can a datafile that is not configured to Auto extend be Redone to Enable autoextend after it has reached 2GB?
If so, how can it be done?
3. Does windows platform has any limitations on Datafile size and autoextend enabled?
4. Which is better? 1. To add additional datafiles or
2. To Enable autoextend and allow one datafile to grow very big (perhaps >5GB or >10GB??


Any assistance is very much welcome

FoKwame
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Old 09-07-10, 14:15
Littlefoot Littlefoot is offline
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Your questions are partially answered in Physical database limits document.

The rest - I wouldn't know, I'm not a DBA.
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Old 09-07-10, 14:56
drew drew is offline
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32GB is the max data file size in your situation.

And yes, you can set a data file to auto extend after it has reached the limit that was set previously.
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Old 09-07-10, 15:57
LKBrwn_DBA LKBrwn_DBA is offline
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Cool

Quote:
Originally Posted by Littlefoot View Post
Your questions are partially answered in Physical database limits document.

The rest - I wouldn't know, I'm not a DBA.
To answer the other part:
Quote:
3. Does windows platform has any limitations on Datafile size and autoextend enabled?
Just make sure "largefiles" is enabled.

Quote:
4. Which is better? 1. To add additional datafiles or 2. To Enable autoextend and allow one datafile to grow very big (perhaps >5GB or >10GB??
I prefer the "Divide and Conquer" approach (multiple small files, perhaps <= 32G)
This because with rman the minimum size of a backup file would be the size of the largest data file.
If you have just a few large data files, then the rman parallel threads are also limited and consequently the backup will take more time.
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Old 09-07-10, 16:00
LKBrwn_DBA LKBrwn_DBA is offline
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Cool

Quote:
Originally Posted by drew View Post
32GB is the max data file size in your situation.

And yes, you can set a data file to auto extend after it has reached the limit that was set previously.
Wow, didn't know 32GB was the max file size on WinDoze 2003?

Can you confirm this? Please post a link...

Thx.

PS: I don't do windoze.
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Old 09-07-10, 16:59
shammat shammat is offline
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Quote:
Originally Posted by drew View Post
32GB is the max data file size in your situation.

And yes, you can set a data file to auto extend after it has reached the limit that was set previously.
Only true for an 8K block size. If you increase the block size to 16KB a single datafile can be 64GB: Oracle Database Specifications for Windows


Quote:
Wow, didn't know 32GB was the max file size on WinDoze 2003?
The 32/64GB limit is an Oracle limit (and will probably apply to other OS as well due to the limit on the number of blocks)

The maximum size of a single file in NTFS is 16 Exabyte
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Old 09-08-10, 13:41
LKBrwn_DBA LKBrwn_DBA is offline
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Thumbs up Clear as mud...?

Quote:
Originally Posted by shammat View Post
Only true for an 8K block size. If you increase the block size to 16KB a single datafile can be 64GB: Oracle Database Specifications for Windows


The 32/64GB limit is an Oracle limit (and will probably apply to other OS as well due to the limit on the number of blocks)

The maximum size of a single file in NTFS is 16 Exabyte
Thanks for the clarification...
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