RE: Which is the frequency to execute GATHER_DICTIONARY_STATS & GATHER_FIXED_OBJECTS_STATS

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_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Juan Carlos Reyes Pacheco
Sent: 17 November 2005 19:30
To: oracle-l_at_freelists.org
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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http://www.freelists.org/webpage/oracle-l Received on Mon Nov 21 2005 - 06:17:45 CST