Re: is this block cleanout ?

"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

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Author: Stephane Faroult
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