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Re: is this block cleanout ?

From: Tim Gorman <Tim_at_SageLogix.com>
Date: Sat, 19 Oct 2002 07:18:29 -0800
Message-ID: <F001.004EE1D0.20021019071829@fatcity.com>


index blocks need to be cleaned out too...

> "Deshpande, Kirti" wrote:
> >
> > That's sounds about right...
> >
> > - Kirti
> >
> > -----Original Message-----
> > Sent: Saturday, October 19, 2002 3:48 AM
> > To: Multiple recipients of list ORACLE-L
> >
> > when i do a count(*) an a 1.2GB table, just after an app finishes
inserting
> > 20 million records
> > i can see from iostat that, that disk is being read as well as written
to
> > !!!
> >
> > the only reason i can think of WRITES being performed while being READ
is
> > the block cleanout is being performed by the count(*) !!
> >
> > i would appreciate if anyone could explain further !
> >
> > regards
> >
> > PS: 7.3.2 on AIX, the file is raw and async_io is true
> >
>
> Kirti,
>
> This is also what I thought, but wouldn't a 'count(*)' just use the
> primary key? (Unless it is a 1.2 G unindexed table). Morover, in my mind
> a block cleanout is associated with a delete, not an insert. Might it be
> say the cleanout of temporary segments after say a direct load ?
>
> Regards,
>
> Stephane Faroult
> Oriole Software
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Stephane Faroult
> INET: sfaroult_at_oriole.com
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Tim Gorman
  INET: Tim_at_SageLogix.com

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Received on Sat Oct 19 2002 - 10:18:29 CDT

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