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This alert indicates that Serving Node CPU utilization has remained above the configured threshold. Sustained CPU pressure can increase query latency or reduce query throughput.

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Assess serving health

  1. Open the project’s metrics page in the RisingWave Cloud portal. Select a time range that starts before the alert was triggered and includes the current time.
  2. Compare the following metrics with the project’s normal baseline and with your application-level query metrics.
  3. Check application-level signals for increased latency, timeouts, or failed queries.

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Scale serving resources

If serving performance is affected or the project does not have sufficient CPU headroom, rescale the project:
  1. Open the project overview page.
  2. Select Rescale.
  3. Open the custom configuration for Serving.
  4. Apply one or both of the following changes:
    • To scale up, increase the RWUs allocated to each Serving Node.
    • To scale out, increase the number of Serving Nodes.
  5. Review and apply the new configuration.

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Confirm recovery

Monitor CPU Utilization and the query metrics until they return to their normal baselines. Confirm that application query latency and error rates have recovered and that the alert has cleared. If CPU pressure or query degradation continues after rescaling, contact the RisingWave Cloud support team. Include the project name, alert trigger time, metric screenshots, and the serving-resource changes already applied.