Call now: 252-767-6166  
Oracle Training Oracle Support Development Oracle Apps

 E-mail Us
 Oracle Articles
New Oracle Articles

 Oracle Training
 Oracle Tips

 Oracle Forum
 Class Catalog

 Remote DBA
 Oracle Tuning
 Emergency 911
 RAC Support
 Apps Support
 Oracle Support

 SQL Tuning

 Oracle UNIX
 Oracle Linux
 Remote s
 Remote plans
 Application Server

 Oracle Forms
 Oracle Portal
 App Upgrades
 SQL Server
 Oracle Concepts
 Software Support

 Remote S


 Consulting Staff
 Consulting Prices
 Help Wanted!


 Oracle Posters
 Oracle Books

 Oracle Scripts

Don Burleson Blog 









Disable statistics with gather_stats_job

Oracle Database Tips by Donald Burleson

First, learn about gather_stats_job at  using gather_stats_job

It's important to understand that there are two scheduled activities related to the collection of Oracle "statistics".  These are very different:

  • AWR statistics:  Oracle has an automatic method to collect AWR "snapshots" of data that is used to create elapsed-time performance reports.  (in Oracle 10g ONLY)

  • Optimizer statistics:  Oracle has an automatic job to collect statistics to help the optimizer make intelligent decisions about the best access method to fetch the desired rows.  This job is disabled with this command:

exec dbms_scheduler.disable('SYS.GATHER_STATS_JOB');

Oracle collects optimizer statistics for SQL via the default of autostats_target = auto.  Sadly, this is confusing because this command appears to be similar in function to this command to disable statistics collection:

SQL> exec dbms_scheduler.disable('SYS.GATHER_STATS_JOB');

Let's take a closer look at how to disable the automated collection of optimizer statistics.

Oracle MOSC notes that there are some DBA activities that require disabling the automatic statistics collection and provides this disable script.  As the SYS user, use the following query to check for this automatic collection job:


If not disabled, use the following command to disable the job:

SQL> exec dbms_scheduler.disable('SYS.GATHER_STATS_JOB');

See my related dbms_stats notes:




Oracle Training at Sea
oracle dba poster

Follow us on Twitter 
Oracle performance tuning software 
Oracle Linux poster


Burleson is the American Team

Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. All legitimate Oracle experts publish their Oracle qualifications.

Errata?  Oracle technology is changing and we strive to update our BC Oracle support information.  If you find an error or have a suggestion for improving our content, we would appreciate your feedback.  Just  e-mail:  

and include the URL for the page.


Burleson Consulting

The Oracle of Database Support

Oracle Performance Tuning

Remote DBA Services


Copyright © 1996 -  2020

All rights reserved by Burleson

Oracle ® is the registered trademark of Oracle Corporation.