!! Please do not post Off Topic to this List !!
Christopher:
I don't have the histograms. Regarding the data,
I actually think they are equally spread, but I will
check. Is there any tool to do this, or is it just
select count() from .. where ...?
--- Christopher Spence <[EMAIL PROTECTED]> wrote:
> !! Please do not post Off Topic to this List !!
>
> You probably have histograms, and very skewed data.
>
> "Do not criticize someone until you walked a mile in
> their shoes, that way
> when you criticize them, you are a mile a way and
> have their shoes."
>
> Christopher R. Spence
> Oracle DBA
> Phone: (978) 322-5744
> Fax: (707) 885-2275
>
> Fuelspot
> 73 Princeton Street
> North, Chelmsford 01863
>
>
>
> -----Original Message-----
> Sent: Thursday, September 13, 2001 2:11 PM
> To: Multiple recipients of list ORACLE-L
>
> !! Please do not post Off Topic to this List !!
>
> Hi all:
>
>
> I have a query, which behaves differently depending
> on the input data (month/year). I have more than
> 15month worth of data in the database. The query
> is completed under 1 minute for the first 13 month,
> but for the last two months it just doesn't finish.
> I
> have cancelled it after 36 minutes. The explain
> plans
> are
> differ in that the "quick" query uses more hash
> jonts,
> while "slow" one utilizes more nested loops. All the
> tables are analyzed. This must have something to
> do with the data distribution, but what? Can anyone
> shed some light onto that?
>
> tia
>
> =====
>
>
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