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An alert is a warning about a potential problem or an indication that a critical threshold has been crossed. There are two types of alerts:
Stateless: Alerts that indicate single events that are not necessarily tied to the system state. For example, an alert that indicates that a capture aborted with a specific error is a stateless alert.
Stateful: Alerts that are associated with a specific system state. Stateful alerts are usually based on a numeric value, with thresholds defined at warning and critical levels. For example, an alert on the current Oracle Streams pool memory usage percentage, with the warning level at 85% and the critical level at 95%, is a stateful alert.
To view the alerts for a database:
Log in to Enterprise Manager as an administrative user, such as the Oracle Streams administrator.
Go to the Database Home page of the database you want to manage.
View the alerts for the database in the Alerts section. You might need to scroll down to see the Alerts section.
Oracle Streams has its own set of alerts. Table: Oracle Streams Alerts describes the alerts related to Oracle Streams.
Oracle Streams Alerts
Alert | Message | Alert Type |
---|---|---|
|
STREAMS capture process capture_name aborted with ORA-error_number |
Stateless |
|
STREAMS propagation process source_queue, destination_queue, database_link aborted after 16 failures |
Stateless |
|
STREAMS apply process apply_name aborted with ORA-error_number |
Stateless |
|
STREAMS error queue for apply process apply_name contains new transaction with ORA-error_number |
Stateless |
|
Automatically set by alert infrastructure |
Stateful |
Note: Oracle Streams alerts are informational only. They do not need to be managed. If you monitor your Oracle Streams environment regularly and address problems as they arise, then you might not need to monitor Oracle Streams alerts.