Example alert setup scenario for thread pool statistics
Follow these steps to access and configure TP statistic alerts.
There are many TP statistic alerts available. Configure the alerts of interest with thresholds appropriate for your environment.
A suggested basic alert to configure is TP: Migrations Pending above 2 for more than 1 minute.
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Click the Alerts menu.
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In the Active Alerts dialog, click Manage Alerts.
The Add Alert dialog appears.
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In the Notify me when menu, choose Advanced > Cassandra > TP: metric name.

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Select the alert notification criteria and the nodes to monitor.

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Click Save Alert.
The alert appears in the Manage Alert Rules list. Repeat these steps for each additional alert.