Re: p1 p2 - is it a header block?

brain-finger-disconnect.

there is a pointer in the segment header block (DBA) tht points to the extent map block. When that is full it will point to the next extent map block.

Anjo.

Rachel_Carmichael_at_Sonymusic.com wrote:

> Anjo!
>
> don't leave us in suspense... pointer in where to the extent map? :)
>
> |--------+----------------------->
> | | |
> | | |
> | | anjo_at_oraperf.|
> | | com |
> | | |
> | | 05/08/2002 |
> | | 09:13 AM |
> | | Please |
> | | respond to |
> | | ORACLE-L |
> | | |
> |--------+----------------------->
> >----------------------------------------------------|
> | |
> | To: ORACLE-L_at_fatcity.com |
> | cc: (bcc: Rachel Carmichael) |
> | Subject: Re: p1 p2 - is it a header |
> | block? |
> >----------------------------------------------------|
>
> Danes over 40 are no longer wanted on the list ;-)
>
> DBA_SEGMENTS shows the header_file and header_block of a segment. There is a
> pointer in the to extent map block (if allocated and if you are using unlimited
> extents).
> Those blocks are just part of the segment..
>
> Anjo.
>
> Mogens Nørgaard wrote:
>
> > The "first" header block will have the lowest block number for that
> > segment. When I say "first" I mean that in 7.3 (because of unlimited
> > maxextents) they created a new type of "overflow" blocks that might in
> > extreme cases also show up as the first blocks - I'm not sure, but Anjo
> > or someone probably knows?
> >
> > Mogens
> >
> > (back on the list after mysteriousely being thrown out some time ago?).
> >
> > Greg Moore wrote:
> >
> > >If you have the file number and block number, you can find which segment it
> > >is. (You find the block belongs to the EMP table.)
> > >
> > >Is there a way to tell if that block is the header block of the segment?
> > >
> >
> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.com
> > --
> > Author: Mogens =?ISO-8859-1?Q?N=F8rgaard?=
> > INET: mln_at_miracleas.dk
> >
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> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Anjo Kolk
> INET: anjo_at_oraperf.com
>
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> --
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> Author:
> INET: Rachel_Carmichael_at_Sonymusic.com
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Anjo Kolk
  INET: anjo_at_oraperf.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
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