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  Oracle Tips by Burleson

Easy Oracle Automation
Chapter 4 -
Automatic Workload Repository and Automatic Database Diagnostic Monitor

AWR Snapshots

Verify the new values by running the query on dba_hist_wr_control. For the above example the following results are obtained:

SNAP_INTERVAL             RETENTION
------------------------- -------------------------
+00000 00:30:00.0         +00030 00:00:00.0

A manual snapshot can also be taken by calling the PL/SQL procedure dbms_workload_repository.create_snapshot. This procedure will immediately take a snapshot and record it in wrm$_snapshot. The metrics at the typical level are collected as the default. This will help to capture system behavior at specific points in time outside the monitoring interval. A high interval value may lead to missing workload spikes.

The following section examines the different types of statistics and metrics collected and at what frequency they can be collected.

 


The above text is an excerpt from:

Easy Oracle Automation
Oracle10g Automatic Storage, Memory and Diagnostic Features

ISBN 0-9745993-6-0

by Dr. Arun Kumar R.
 


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