Oracle Exadata Storage Server Software detects resource bottlenecks on Exadata Storage Servers by monitoring CPU utilization. When a bottleneck is found, work is relocated to improve performance. Each Exadata Cell maintains the following statistics:

• Exadata Cell CPU usage and push-back rate snapshots for the last 30 minutes.

• Total number of 1MB blocks that had a push-back decision on.

• Number of blocks that have been pushed back to the database servers.

• The statistic Total cpu passthru output IO size in KB.