"db file sequential read" means single block read, which can be either from
an index or from a table. Likewise, "db file scattered read" means
multiblock read, which again can be either from a table or from an index.
At 10:01 AM 6/11/2003 -0800, you wrote:
Good day all,
We have a bunch of queries in our data warehouse environment that are
taking a long time to complete.
I did a select on v$session_wait on one of the queries when it is running
and it shows the wait event to be 'db file sequential read', which means
it is scanning index blocks, correct? But when I put the p1 p2 p3 values
into another query to see which segment it belongs to, it shows me a
table, not an index. How can this be?
Wolfgang Breitling
Oracle7, 8, 8i, 9i OCP DBA
Centrex Consulting Corporation
http://www.centrexcc.com
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Author: Wolfgang Breitling
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Fat City Network Services -- 858-538-5051 http://www.fatcity.com
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Received on Wed Jun 11 2003 - 13:12:27 CDT
