RE: RE: Time to read 6000 (block size 2k) blocks
- From: J.Velikanovs@xxxxxxxx
- To: oracle-l@xxxxxxxxxxxxx
- Date: Fri, 6 Aug 2004 20:57:44 +0300
Thank you father!
.
The lesson you have given me is invaluable.
Lets me guess for the next step.
I imagine that we can try use our magic artifact,
which we have received from Mag
with beautiful name Oracle8i.
.
I gona use magic of DBMS_STATS.
Please allow me to try?!
.
Jurijs
+371 9268222 (+2 GMT)
============================================
Thank you for teaching me.
http://otn.oracle.com/ocm/jvelikanovs.html
"Cary Millsap" <cary.millsap@xxxxxxxxxx>
Sent by: oracle-l-bounce@xxxxxxxxxxxxx
06.08.2004 20:21
Please respond to oracle-l
To: <oracle-l@xxxxxxxxxxxxx>
cc:
Subject: RE: RE: Time to read 6000 (block size 2k) blocks
Excellent to watch this, buys.
Now, if I might suggest: Please take the next step as well, which is to
figure out how to make the CBO execute the correct plan WITHOUT leaving =
the
hints in. Doing this step now will save you some potentially difficult
maintenance tasks later on.
Cary Millsap
Hotsos Enterprises, Ltd.
http://www.hotsos.com
* Nullius in verba *
Upcoming events:
- Performance Diagnosis 101: 8/10 Boston, 9/14 San Francisco, 10/5 =
Charlotte
- SQL Optimization 101: 7/26 Washington DC, 8/16 Minneapolis, 9/20 =
Hartford
- Hotsos Symposium 2005: March 6-10 Dallas
- Visit www.hotsos.com for schedule details...
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx =
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]
On Behalf Of jaysingh1@xxxxxxxxxxxxx
Sent: Friday, August 06, 2004 12:10 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: RE: Time to read 6000 (block size 2k) blocks
Jurijs
You are correct. It worked. Now it is doing 9 LIOs instead of 18,800 =
LIOs.
Thanks you so much.
----- Original Message -----
From: J.Velikanovs@xxxxxxxx
Date: Friday, August 6, 2004 11:12 am
Subject: Re: RE: Time to read 6000 (block size 2k) blocks
> Rows Row Source Operation
> ------- ---------------------------------------------------
> 1 SORT UNIQUE=20
> 1 COUNT STOPKEY=20
> 1 NESTED LOOPS=20
> 4766 TABLE ACCESS BY INDEX ROWID PROFILEDUSER (it has=20
> 450,000 rows)
> 4767 INDEX RANGE SCAN (PROFILEDUSER_IX03)
> 1 TABLE ACCESS BY INDEX ROWID EXTENDEDATTRIBUTES (it has=20
> 15,000=20
> rows)
> 9530 INDEX UNIQUE SCAN (ATTRIBUTES_PK)
>=20
> The idea is: to start NL with EXTENDEDATTRIBUTES table. Bacause in=20
> SQL you=20
> have E.CUSTOMERID =3D 'ABCDEFGH', and this seems ID value, which=20
> will return=20
> 1 row, instead 4766 loops thought PROFILEDUSER.
>=20
> Try to get EXTENDEDATTRIBUTES as driven table. Or I am wrong ?
>=20
>=20
> Jurijs
> +371 9268222 (+2 GMT)
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