This metric signifies that the database being monitored has generated a corrupted block error to the ALERT file since the last sample time. The ALERT file is a special trace file containing a chronological log of messages and errors. An alert event is triggered when data block corrupted messages are written to the ALERT file.
The rest of the information in this section is only valid for this metric when it appears in either the Enterprise Manager Grid Control or the Enterprise Manager Database Control (if applicable).
The following table shows how often the metric's value is collected and compared against the default thresholds. The 'Consecutive Number of Occurrences Preceding Notification' column indicates the consecutive number of times the comparison against thresholds should hold TRUE before an alert is generated.
|
Target Version |
Evaluation and Collection Frequency |
Upload Frequency |
Operator |
Default Warning Threshold |
Default Critical Threshold |
Consecutive Number of Occurrences Preceding Notification |
Alert Text |
|
pre-10g; 10.1.0.x; 10.2.0.x |
Every 15 Minutes |
After Every Sample |
CONTAINS |
Not Defined |
ORA- |
1* |
A data block was corrupted at time/line number: %timeLine%. |
* Once an alert is triggered for this metric, it must be manually cleared.
For this metric you can set different warning and critical threshold values for each "Time/Line Number" object.
If warning or critical threshold values are currently set for any "Time/Line Number" object, those thresholds can be viewed on the Metric Detail page for this metric.
To specify or change warning or critical threshold values for each "Time/Line Number" object, use the Edit Thresholds page. See Editing Thresholds for information on accessing the Edit Thresholds page.
$ORACLE_HOME/sysman/admin/scripts/alertlog.pl where $ORACLE_HOME refers to the home of the Oracle Management Agent.
Examine ALERT log for additional information. Note: This event does not automatically clear since there is no automatic way of determining when the problem has been resolved. Hence, you need to manually clear the event once the problem is fixed.
Related Topics
About Alerts
About the Metric Detail Page
Editing Thresholds
Copyright © 1996, 2009, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its affiliates.
Other names may be trademarks of their respective owners.