RE: Which is the frequency to execute GATHER_DICTIONARY_STATS & GATHER_FIXED_OBJECTS_STATS
- From: "Hallas, John, Tech Dev" <John.Hallas@xxxxxxxxxxxxxxxxx>
- To: <juancarlosreyesp@xxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 21 Nov 2005 12:15:31 -0000
Oracle suggests the following best practices for collecting statistics.
http://www.oracle.com/technology/books/pdfs/book_10g_chap9_ce1.pdf
* Collect statistics for normal data dictionary objects using
the same interval that you would analyze objects in your schemas. In
addition, you need to analyze the dictionary objects after a sufficient
amount of DDL operations have occurred.
* Use the procedures gather_database_stats or
gather_schema_stats with options set to GATHER AUTO. With this feature,
only the objects that need to be re-analyzed are processed every time.
* For fixed objects, the initial collection of statistics is
usually sufficient. A subsequent collection is not usually needed,
unless workload characteristics have changed dramatically. In the next
section, we will examine the changes introduced
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Juan Carlos Reyes
Pacheco
Sent: 17 November 2005 19:30
To: oracle-l@xxxxxxxxxxxxx
Subject: Which is the frequency to execute GATHER_DICTIONARY_STATS &
GATHER_FIXED_OBJECTS_STATS
Hi, please can some body share some rules about running this
dbms_stats procedures.
In documentation says, you have to run....
but I still don't got, how frequently, or if some background process
does it periodically so the only thing you have to do is for example
ste statistics level to typical or all.
Thank you
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Oracle Certified Profesional 9i 10g
Orace Certified Professional Developer 6i
8 years of experience in Oracle 7,8i,9i,10g and developer 6i
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