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 <[EMAIL PROTECTED]>
wrote: > > -----Original Message-----
> > From: Miller, Jay
> [mailto:[EMAIL PROTECTED]]
> >
> > 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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