RE: automatic extent allocation

>From the version 9.2 Reference Manual:

MAXEXTENTS
 Default value
 Derived from tablespace default storage or DB_BLOCK_SIZE initialization parameter  

Maximum
 Unlimited  

I was thinking that "Unlimited" actually corresponds to 2 billion. In any case it is a lot and probably more than enough for most shops.

HTH -- Mark D Powell --

-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Roger Xu Sent: Friday, January 07, 2005 3:53 PM
To: Jonathan Lewis; Oracle-L_at_Freelists. Org (E-mail) Subject: RE: automatic extent allocation

So the suggestion would be to move it to its own tablespace with uniform extent allocation? What is Oracle 9i's limit as far as the number of extents in a table? Thanks.
-----Original Message-----
From: Jonathan Lewis [ mailto:jonathan_at_jlcomp.demon.co.uk] Sent: Friday, January 07, 2005 2:33 AM
To: Roger Xu; Oracle-L_at_Freelists. Org (E-mail) Subject: Re: automatic extent allocation

In the first place, I would consider moving the object out of the current tablespace (or move everything else out of the tablespace) because it sounds like nothing else should be sharing that tablespace. (Consider the problem of recovering the entire tablespace because one of the other tables gets a corrupt block - if you can't take advantage of rman block level recovery).

Secondly, at 3GB per month, I would consider partitioning the table at something like one partition per month - thus making your question moot.

It sounds like your object is still using 64MB extents - it would be interesting to see if there is another step size when you hit a total of 64GB, or whether you keep going at 50 extents per month.

I suspect the problems you __might__ get from having 2,000 extents are much less significant than the problems you __might__ get if you have a 100GB segment by the end of next year.

Regards

Jonathan Lewis

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