RE: dbms_stats
- From: John Hallas <John.Hallas@xxxxxxxxxxxxxxxxxx>
- To: "piontekdd@xxxxxxxxx" <piontekdd@xxxxxxxxx>, "jaromir@xxxxxxxxxxxx" <jaromir@xxxxxxxxxxxx>, "mhdmehraj@xxxxxxxxx" <mhdmehraj@xxxxxxxxx>, "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 3 Jun 2009 16:09:45 +0100
In agreement with what others have said but doesn't analyze lock the table as
well which is a definite no-no. It also does not have a parallel degree option.
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Bradd Piontek
Sent: 03 June 2009 12:44
To: jaromir@xxxxxxxxxxxx; mhdmehraj@xxxxxxxxx; oracle-l@xxxxxxxxxxxxx
Subject: Re: dbms_stats
I'd also rerun the dbms_stats call with 'cascade=true'. Leaping to the
conclusion that analyze is better than dbms_stats using a couple
queries and providing no metrics other then elapsed time isn't very
good proof.
Bradd
On 6/3/09, jaromir nemec <jaromir@xxxxxxxxxxxx> wrote:
> Hi,
>
>>
>> so from my test , i show analyze is better than DBMS_STATS..... Any
>> other ideas plz
>
> This shows first of all that the second test runs better then the first one.
> This could be a result of caching.
>
> I'd suggest:
>
> 1) run the selects with autotrace on to see if you have different
> execution plans
>
> 2) repeat the runs to see the ratio of logical and physical I/O (also
> visible in autotrace output)
>
> HTH
>
> Jaromir
>
>
>
> --
> //www.freelists.org/webpage/oracle-l
>
>
>
--
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Bradd Piontek
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the greatest joy is in having someone
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