| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
 |
 | |||
| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
|
| |||
Home -> Community -> Mailing Lists -> Oracle-L -> RE: RE: Time to read 6000 (block size 2k) blocks
Wrong :)
Event 10053 would do much better in this case.
Igor
-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of
J.Velikanovs_at_alise.lv
Sent: Friday, August 06, 2004 12:58 PM
To: oracle-l_at_freelists.org
Subject: RE: RE: Time to read 6000 (block size 2k) blocks
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)
"Cary Millsap" <cary.millsap_at_hotsos.com>
Sent by: oracle-l-bounce_at_freelists.org
06.08.2004 20:21
Please respond to oracle-l
To: <oracle-l_at_freelists.org>
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_at_freelists.org =
[mailto:oracle-l-bounce_at_freelists.org]
On Behalf Of jaysingh1_at_optonline.net
Sent: Friday, August 06, 2004 12:10 PM
To: oracle-l_at_freelists.org
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.
> 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) ----------------------------------------------------------------Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html ----------------------------------------------------------------- ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request_at_freelists.org put 'unsubscribe' in the subject line. -- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html ----------------------------------------------------------------- ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request_at_freelists.org put 'unsubscribe' in the subject line. -- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html ----------------------------------------------------------------- ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request_at_freelists.org put 'unsubscribe' in the subject line. -- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------Received on Fri Aug 06 2004 - 13:07:06 CDT
 |
 |