Re: data file compact

Hi Fraser,

I read the info about extents and understand. But What is ment by "localy managed"?

We only have 2 table spaces that need work, RBS and USERS.

"ed zappulla" <zappullae_at_rcn.com> wrote in message news:9sm2pj$bq1$1_at_bob.news.rcn.net...
> Thanks for the help. Same for the help from Sybrand.
>
> We do a nightly export so I can kill the table space and recreate to
reclaim
> space.
>
> i'm not sure what you mean by, uniform extent size?
>
> I will defiitly check out the link.
>
>
> "Fraser McCallum" <fmcc_at_NOSPAModbaguru.com> wrote in message
> news:%HeH7.4648$ax1.49253_at_NewsReader...
> > Ed,
> >
> > Try Alter tablespace xxxx coalesce;
> >
> > This will do the defragmentation of free space, what this means is that
if
> > there are two segments of free space next to each other it will make
them
> > one larger segment. However it does not shrink datafile nor does it
> > rearrange the contents of the tablespace to compact the data.
> >
> > You can shrink a datafile (look up alter datafile) if and only if there
is
> > no data at the tail end of it.
> >
> > I suspect your real problem is a lack of uniform extent size. The best
> space
> > allocation comes when you choose table and index sizes using uniform
> extent
> > sizes. Rather than re hashing what's been said well else where suggest
you
> > look at http://www.ixora.com.au/tips/creation/extents.htm for a good
> > explanation of what I'm talking about.
> >
> > Ultimately I would suggest, and this is my personal preference, a
> > reorganisation of your database into locally managed tablespaces with
> > uniformed extent sizes.
> >
> > Kind Regards
> >
> > Fraser McCallum
> > MVP Oracle Administration
> > www.brainbench.com
> >
> > "ed zappulla" <zappullae_at_rcn.com> wrote in message
> > news:9sjqj3$oks$1_at_bob.news.rcn.net...
> > > Compacting refers to the process where by holes in data files are
> > > deframented and the data file shrunk to release unused space.
> > >
> > > We do have the table spaces on auto extend. purposfully. our thought
> was
> > > that it was needed to allow for growth.
> > >
> > > Dose Oracle not reuse table space if auto extend is on, extend before
> > > reusing freed space?
> > >
> > >
> > > "Sybrand Bakker" <postbus_at_sybrandb.demon.nl> wrote in message
> > > news:tuqhjc537ah764_at_corp.supernews.com...
> > > >
> > > > "ed zappulla" <zappullae_at_rcn.com> wrote in message
> > > > news:9sjedu$c8j$1_at_bob.news.rcn.net...
> > > > > Is there a way to compact the data files that oracle 8.1.6 uses?
> They
> > > > seem
> > > > > to be growing very large while the amount of data an indexs held
> > remains
> > > > the
> > > > > same.
> > > > >
> > > > >
> > > > >
> > > >
> > > > There is no mechanism to 'compact' the datafiles, whatever you may
> mean
> > by
> > > > compacting.
> > > > Please check whether you have any tablespace(s) on autoextend. This
> must
> > > be
> > > > the case otherwise datafiles wouldn't grow. Please also check how
much
> > of
> > > > the allocated space is actually occupied.
> > > > If you don't know how to do that please read the Oracle Server
> > > > Administrators Manual.
> > > >
> > > > Hth
> > > > --
> > > > Sybrand Bakker
> > > > Senior Oracle DBA
> > > >
> > > > to reply remove '-verwijderdit' from my e-mail address
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>
Received on Tue Nov 13 2001 - 07:35:34 CST