Hi Luc,
It depends on the size of your sorts.
You can check the extents column in v$sort_usage, if
it's always bigger than 1, it means the extent size is
too small.
- "DEMANCHE Luc (Cetelem)" <luc.demanche_at_cetelem.fr>
a écrit : > Stephane,
>
> What situation would make you choose a certain value
> (i.e.: using '3'
> versus '4.5')?
>
> -----Message d'origine-----
> De: paquette stephane [
> mailto:stephane_paquette_at_yahoo.com
> <mailto:stephane_paquette_at_yahoo.com> ]
> Date: Tuesday, April 24, 2001 6:03 PM
> À: Multiple recipients of list ORACLE-L
> Objet: Re: sort_area_size + temp tablespace extent
> sizing
>
>
> The extent size of the temp tablespace should be a
> multiple of the sort_area_size parameter + 1 block.
>
> If your sort_area_size is 128K and if you need to go
>
> to temp tablespace that means that 128K is not
> enough
> so you should allocate for more than 128K.
>
> temp extent = (sort_area_size*n)+ 1 block
> where n goes from 2 to usually 4,5
> depending on your situation
>
>
>
> --- Adrian Roe <adrian.roe_at_telewest.co.uk> a écrit :
> >
> Hi List,
> >
> > Quick question regarding temp tablespace extent
> > sizing.
> >
> > I have always assumed that the extent size for a
> > temporary tablespace needs
> > to be equal to the size that sort_area_size is set
>
> > to. A sort that can't fit
> > into memory then goes and grabs temp tablespace
> > extents of a size equal to
> > sort_area_size. However, I have read somewhere
> that
> > the extent size should
> > be equal to sort_area_size + block size (the block
>
> > being used for header
> > infomation or something like that) eg. 8k block
> size
> > and 64k sort area size
> > results in 72K temp tablespace extent size.
> >
> > So, assume I have a sort area size of 128K and
> block
> > size of 8k, do I need
> > to set temp tablespace extent sizes to 128K or
> 136K,
> > or doesn't it really
> > matter.
> >
> > Thanks,
> >
> > Ade
> >
> >
> >
>
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> > Author: Adrian Roe
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> =====
> Stéphane Paquette
> DBA Oracle, consultant entrepôt de données
> Oracle DBA, datawarehouse consultant
> stephane_paquette_at_yahoo.com
>
>
>
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Stéphane Paquette
DBA Oracle, consultant entrepôt de données
Oracle DBA, datawarehouse consultant
stephane_paquette_at_yahoo.com
Do You Yahoo!? -- Pour faire vos courses sur le Net,
Yahoo! Shopping :
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--
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Author: =?iso-8859-1?q?paquette=20stephane?=
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Received on Wed Apr 25 2001 - 12:46:42 CDT
