| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
 |
 | |||
| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
|
| |||
Home -> Community -> Mailing Lists -> Oracle-L -> [oracle-l] Re: Index block count
Yes, good question, we analyze each night. There are loads going on all the
time.
-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On
Behalf Of Bobak, Mark
Sent: Tuesday, January 27, 2004 4:12 PM
To: oracle-l_at_freelists.org
Subject: [oracle-l] Re: Index block count
Tom,
You say the blevel is 2. At the risk of stating the obvious, are stats up to date? Have you loaded any data recently?
Mark J. Bobak
Oracle DBA
ProQuest Company
Ann Arbor, MI
"Imagination was given to man to compensate him for what he is not, and a sense
of humor was provided to console him for what he is." --Unknown
-----Original Message-----
From: Terrian, Tom (Contractor) (DAASC) [mailto:Tom.Terrian_at_dla.mil]=20
Sent: Tuesday, January 27, 2004 4:08 PM
To: 'oracle-l_at_freelists.org'
Subject: [oracle-l] Index block count
I have a b-tree, unique, local, prefixed, range partitioned index. The blevel on all of the partitions is 2. There are no chained/migrated rows in the table. =20 I have a query that selects 1 record and only uses the index. I am not sure why the query uses 4 blocks. I would think that it would just have to use 1 for the branch block and 1 for the leaf block. Can someone explain it to me? (I have run the query 8,000 times and the average blocks per execution is 4.1) Thanks, Tom
 |
 |