Skip to Main Content
Oracle Data Warehouse Tuning for 10g
book

Oracle Data Warehouse Tuning for 10g

by Gavin JT Powell
April 2011
Intermediate to advanced content levelIntermediate to advanced
504 pages
16h 49m
English
Digital Press
Content preview from Oracle Data Warehouse Tuning for 10g
196 7.3 Tools for Tuning Queries
Note: The IDLEEVENT function filters events on the V$SESSION_
WAIT view.
A faster result is possible for the above query by joining DBA_
EXTENTS.FILE_ID and DBA_EXTENTS.BLOCK_ID, retrieving only
wait events for extent headers as follows:
sw.block_id BETWEEN de.block_id AND de.block_id + blocks -1
Idle Events
An idle event is idle because nothing is happening. An idle event is a result
of a process that is busy waiting for something else to respond. Idle events
are generally insignificant as far as performance is concerned, although they
can sometimes show a distinct lack of activity, a lack of use of resources or
simply over ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Oracle 10g Data Warehousing

Oracle 10g Data Warehousing

Lilian Hobbs, Susan Hillson, Shilpa Lawande, Pete Smith
Expert Oracle Enterprise Manager 12c

Expert Oracle Enterprise Manager 12c

Kellyn Pot'vin, Anand Akela, Gokhan Atil, Bobby Curtis, Alex Gorbachev, Niall Litchfield, Leighton Nelson, Pete Sharman

Publisher Resources

ISBN: 9781555583354