Specifications

l Hourly Rollup (peak): The highest values from the data collected during the
last hour.
l Daily Rollup (peak): The highest values from the hourly rollups during the
last 24 hour period.
l Weekly Rollup (peak): The highest values from the daily rollups during the
last seven days.
l Monthly Rollup (peak): The highest values from the daily rollups during the
last calendar month.
l Quarterly Rollup (peak): The highest values from the monthly rollups during
the last quarter.
Note: Monthly and quarterly rollups are not generated daily, as this operation
would generate a considerable computation load every day.
Although average and peak are the two most common metrics, other metrics
collected by the performance job use different rollups. For example, when the
Powered On status is rolled up, Virtualization Manager only retains whether the
system was mostly on or off during the rollup period.
Data retention
Raw performance data is saved for 14 days, and hourly rollups are saved for 90
days by default. You can change how long Virtualization Manager retains this
data under Setup > Advanced Setup > System Properties. Increasing the
length of time data is retained may slow down the application or the database if
you do not provide adequate storage resources. However, any increase to the
raw performance data and hourly rollup retention will significantly impact your
database size.
This can be configured in Setup > Advanced Setup > System Properties.
The following table provides data retention information per rollup period.
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Data retention