Dba_outstanding_alerts-addm

Question

can any one tell me ADDM. I have got message from dba_outstanding_alerts.
EVENT_CLASS Warning 5
Metrics "Database Time Spent Waiting (%)" is at 60.98381 for event class "Other"
Run ADDM to get more performance analysis about your system.
please clarify this alert.

Answer 1

dbaforu,
I presume you have not read the documentation that i have pointed out;
http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/diagnsis.htm
+6.2.4.1 Running ADDM Using addmrpt.sql+
To invoke ADDM analysis for the scenario previously described, you can simply run the addmrpt.sql script at the SQL prompt:
+@$ORACLE_HOME/rdbms/admin/addmrpt.sql+
When running the addmrpt.sql report to analyze the specific time period in the example scenario, you need to:
+1.+
Identify the last snapshot that was taken before or at 7 P.M. and the first snapshot that was taken after or at 9 P.M. of the previous night from the list of recent snapshots that the report initially displays. The output is similar to the following:
Listing the last 3 days of Completed Snapshots
+...+
Snap
Instance     DB Name        Snap Id    Snap Started    Level
main         MAIN               136 20 Oct 2003 18:30      1
+137 20 Oct 2003 19:00 1+
+138 20 Oct 2003 19:30 1+
+139 20 Oct 2003 20:00 1+
+140 20 Oct 2003 20:30 1+
+141 20 Oct 2003 21:00 1+
+142 20 Oct 2003 21:30 1+
+2.+
Provide the snapshot Id closest to 7 P.M. when prompted for the beginning snapshot and the 9 P.M. snapshot Id when prompted for the ending snapshot.
Enter value for begin_snap: 137
Begin Snapshot Id specified: 137
Enter value for end_snap: 141
End   Snapshot Id specified: 141
+3.+
Enter a report name or accept the default name when prompted to specify the report name.
Enter value for report_name:
Using the report name addmrpt_1_137_145.txt
Running the ADDM analysis on the specified pair of snapshots ...
Generating the ADDM report for this analysis ...
After the report name is specified, ADDM analysis over the specific time frame is performed. At the end of the analysis, the SQL script displays the textual ADDM report of the analysis. You can review the report to find the top performance issues affecting the database and possible ways to solve those issues.
Instructions for running the report addmrpt.sql in a non-interactive mode can be found at the beginning of the $ORACLE_HOME/rdbms/admin/addmrpt.sql file.
Ogan