CPU and storage are key resources that you need to monitor in Spanner to make sure that your instance is provisioned with enough nodes to give you the expected performance. Spanner already has integration with the [Google Cloud Monitoring]  suite, where you can [set alerts]  for CPU and storage utilization metrics based on [recommended thresholds] . You will be automatically alerted when the value of the metrics cross the threshold. You can visit the monitoring tab in the [Spanner console]  to look at the metrics in detail and analyze how those change over time.

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