RE: Locally Managed Tablespace Uniform Extent

From: Connor McDonald <hamcdc_at_yahoo.co.uk>
Date: Tue, 03 Apr 2001 14:42:42 -0700
Message-ID: <F001.002E08C0.20010403144543@fatcity.com>

I think its to keep the extents identifiable within the segment header block - sort of in the same way that oracle used to do in the earlier versions (which limited the extents to 121, 249, 505 etc dependent on block size)

hth
connor

• Jacques Kilchoer <Jacques.Kilchoer_at_quest.com> wrote: > > -----Original Message-----
  > > From: Miller, Jay
  > [mailto:JayMiller_at_TDWaterhouse.com]
  > >
  > > My understanding was that the main reason to keep
  > the number
  > > of extents down
  > > was in case you needed to drop or truncate the
  > table it would
  > > take Oracle a
  > > long time to clean up the fet$ table.
  > > I think, and I emphasize that I am not certain of
  > this, that
  > > this is no
  > > longer a problem with locally managed tablespaces.
  > > I'm sure someone will correct me if I'm wrong...
  >
  > As usual, Steve Adams has some sage advice on the
  > subject. Check out his
  > article "Planning Extents"
  > http://www.ixora.com.au (click on Tips then on
  > Planning Extents)
  > in which he mentions that there are reasons for
  > keeping the number of
  > extents down even in a locally managed tablespace.
  >
  

  ---

Connor McDonald
http://www.oracledba.co.uk (mirrored at http://www.oradba.freeserve.co.uk)

"Some days you're the pigeon, some days you're the statue"

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Received on Tue Apr 03 2001 - 16:42:42 CDT