Metrics Retention Period

At regular intervals, NSX Advanced Load Balancer Service Engines collect values for a wide range of metrics and send them to the NSX Advanced Load Balancer Controller. The Controller then aggregates these metric values into several buckets.

For more information on the types of metrics, see Metrics List.

The frequency of metrics collection is determined by the setting with a virtual service’s analytics setting. This can be as infrequent as every five minutes or as frequent as every 5 seconds. If a DDoS event is detected by an SE, the SE immediately sends information about the attack to the Controller rather than storing it locally until the next polling interval.

The following table lists the increments in which metrics data can be displayed in the web interface. The data granularity per increment and the retention period also are listed.

Note:

Metric Increments	Data Granularity	Retention Period
Real time*	5 seconds	1 hour
Past 6 hours	5 minutes	1 day
Past day	5 minutes	1 day
Past week	1 per hour	1 week
Past Month	1 per day	1 year
Past quarter	1 per day	1 year
Past year	1 per day	1 per year

Note:

Real-time metrics are activated by default for the first 30 minutes of a virtual service’s life. After these initial 30 minutes, real-time metrics are deactivated to conserve resources. Real-time metrics can be re-activated manually at any time.