Create Manual Snapshot
Login to the database using SYS user.
Then, execute the following command to create a manual snapshot.
EXECUTE dbms_workload_repository.create_snapshot();
Then wait for 30 min ( or required time period ) and create another manual snapshot by following
command.
EXECUTE dbms_workload_repository.create_snapshot();
Then generate the AWR between those two manual snapshots.
Generating an AWR Report
The awrrpt.sql SQL script generates an HTML or text report that displays statistics for a range of snapshot Ids.
To generate an AWR report for a range of snapshots:
At the SQL prompt, enter:
@$ORACLE_HOME/rdbms/admin/awrrpt.sql
Specify whether you want an HTML or a text report:
Enter value for report_type: text
Specify the number of days for which you want to list snapshot Ids.
Enter value for num_days: 2
A list of existing snapshots for the specified time range is displayed. In this example, snapshots captured in the last 2 days are displayed.
Specify a beginning and ending snapshot ID for the workload repository report:
Enter value for begin_snap: 150
Enter value for end_snap: 160
In this example, the snapshot with a snapshot ID of 150 is selected as the beginning snapshot, and the snapshot with a snapshot ID of 160 is selected as the ending snapshot.
Enter a report name, or accept the default report name:
Enter value for report_name:
Using the report name awrrpt_1_150_160
In this example, the default name is accepted and an AWR report named awrrpt_1_150_160 is generated.
