The reader server for an apply process dequeues messages from the queue. The reader server computes dependencies between LCRs and assembles messages into transactions. The reader server then returns the assembled transactions to the coordinator, which assigns them to idle apply servers.
This metric shows the rate at which message are getting spilled (per second) by the reader server for the apply process since the last time the apply process was started.
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 |
|
All Versions |
Every 5 Minutes |
After Every Sample |
> |
Not Defined |
Not Defined |
1 |
Total number of spilled messages for Apply Process [%APPLY_NAME%] is %value% . |
For this metric you can set different warning and critical threshold values for each "Apply Name" object.
If warning or critical threshold values are currently set for any "Apply Name" 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 "Apply Name" object, use the Edit Thresholds page. See Editing Thresholds for information on accessing the Edit Thresholds page.
For this metric, the data source is Target database, gv$streams_apply_reader view.
None
Related Topics
About Alerts
About the Metric Detail Page
Editing Thresholds
Understanding Line Charts
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