Re: decrease initial extent

----- Original Message -----

From: Adams, Matthew (GECP, MABG, 088130)

To: Multiple recipients of list ORACLE-L

Sent: Thursday, December 04, 2003 5:04 PM

Subject: RE: decrease initial extent

Mladen,

Keep reading, it's further down.

From the 8.1.7 SQL Reference Manual, under the ALTER TABLE entry
(top of page 8-36):

"If you specify KEEP, then the specified amount of space is kept
and the remaining space is freed. When the remaining
number of extents is less than MINEXTENTS, then
MINEXTENTS is adjusted to the new number of extents. If the
initial extent becomes smaller than INITIAL, then INITIAL
is adjusted to the new size."

----
Matt Adams - GE Appliances - matt.adams@appl.ge.com
Their fundamental design flaws are completely
hidden by their superficial design flaws.
          - Douglas Adams

-----Original Message-----
From: Mladen Gogala [mailto:mladen@wangtrading.com]
Sent: Wednesday, December 03, 2003 5:19 PM
To: Multiple recipients of list ORACLE-L
Subject: Re: decrease initial extent

I don't understand. Here is what manual says:

deallocate_unused_clause

Use the deallocate_unused_clause to explicitly deallocate unused space at the end of the table,
partition or subpartition, overflow data segment, LOB data segment, or LOB index and make the
space available for other segments in the tablespace.

It's not supposed to change the characteristics of the initial extent. Funny. I'll test it
at home.

On 12/03/2003 04:44:27 PM, nelson.petersen@homehardware.ca wrote:
> Since I agreed with Mladen that it wouldn't work, I just had to test this.
> 
> On 8.1.7.3 on OpenVMS the "deallocate unused keep # " shrinks the initial
> extent.
> It shrank a test table from  1m to 8k.  I'm not sure why it chose 8k.
> (db_block_size=4k, default initial_extent for the tablespace=64k)
> 
> I assume it would work on SYS tables as well.
> (No sacrificial database that I'm willing to try it on.)
> 
> Nelson
>
> -----Original Message-----
> [mailto:Alexander.Feinstein@mitchell1.com]
> Sent: Wednesday, December 03, 2003 4:09 PM
> To: Multiple recipients of list ORACLE-L
>
>
>
> If you use "keep <int>" it will.
>
> Alex.
>
>
> -----Original Message-----
> <mailto:mladen@wangtrading.com> ]
> Sent: Wednesday, December 03, 2003 12:59 PM
> To: Multiple recipients of list ORACLE-L
>
>
> That will not do anything for the initial extent.
> You may try with
>
> alter table <table> pray intensely for the desired change;
>
>
> On 12/03/2003 03:34:25 PM, Alexander.Feinstein@mitchell1.com wrote:
> > alter table <tbl_name> deallocate unused keep 1;
> >
> > Alex.
> >
> >
> > -----Original Message-----
> > Sent: Wednesday, December 03, 2003 10:09 AM
> > To: Multiple recipients of list ORACLE-L
> >
> >
> > Is there any way to decrease the initial extent allocated to a table.
> > It is one of the system tables, so I do not want to drop and recreate
> > it. I can not export/import as it appear in noexp$. It has long field
> > so I can not do alter table move.
> >
> > Yechiel Adar
> > Mehish
> > --
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> > --
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> >   INET: adar76@inter.net.il
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> Mladen Gogala
> Oracle DBA
>
>
>
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Mladen Gogala
Oracle DBA

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