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Re: Extent size

From: herve.MAYNE <herve.MAYNE_at_wanadoo.fr>
Date: Sun, 5 Dec 1999 09:03:47 +0100
Message-ID: <82d6hg$209$1@wanadoo.fr>


hello
remarks for number max extents:
7.0-2 : the max number is depending of your db_block_size

            db_block_size = 2048  then max extents <= 121
            db_block_size = 4096 then max extents  <= 249
            db_block_size = 8192 then max extents   <= 505
in 7.3.3-4 and 8.x:
            db_block_size = xxxxx max extents can be unlimited but it ' s
better to limit your max extents .
good luck

<vijaylamba_at_my-deja.com> a écrit dans le message : 82at7i$oks$1_at_nnrp1.deja.com...
> Hi Pierre,
> First of all if your oracle version is 7 then u can have maximum 249
> extents but if it is oracle 8 then it is a much higher value.
> Therefore if u specify a small extent size, then in case of oracle 7, u
> might get the maxextents error. u should size your extents depending on
> the version u're using. It is always good to have initial and next
> extent of the same size with pctincrease 0. also think beforehand about
> pctfree and pctused depending on updates, deletes and inserts.(defaults
> given by oracle are not appropriate)
> Also do create a temporary tablespace in case u have not created.
> I hope this has helped.
> All the best
> Vijay
>
> In article <3846A6AF.1369BC92_at_pyramique.fr>,
> Pierre STREEL <pstreel_at_pyramique.fr> wrote:
> > Hi,
> >
> > I want to optimize my new database. I have 3 types of tables :
> > - with 1.000.000 Rows (a lot of insertion in one time)
> > - with 100.000 Rows (a lot of insertion in one time)
> > - with 10.000 Rows
> > - with 1.000 Rows
> >
> > I created 3 tablespaces for these data :
> > - 128 K extent size for the first one
> > - 96 K extent size for the second one
> > - 64 K extent size for the third
> > - 8 K extent size for the last
> >
> > and 2 tablespace for index, one for the big table and the other for
> > small table
> >
> > Is it good to work like this, is it too much or too small ?
> > What's the best solution for storage, in general ?
> >
> > Thanks in advance :o)
> >
> > Pierre
> >
> >
>
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.
Received on Sun Dec 05 1999 - 02:03:47 CST

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