vCenter Server Performance Intervals
A vCenter Server system aggregates performance data from all ESXi systems that it manages. The amount of data aggregated depends on the level setting configured for the vCenter Server. The level settings are reflected in the PerformanceManager.historicalInterval property for the vCenter Server system. historicalInterval is an array of PerfInterval data objects that define four different level settings, 1 through 4.
The following table lists the default values for the performance intervals on a vCenter Server system.
| Key | Name | Sampling Period | Length | Enabled | Level |
|---|---|---|---|---|---|
| 1 | Past Day | 300 | 86400 | TRUE | 1 |
| 2 | Past Week | 1800 | 604800 | TRUE | 1 |
| 3 | Past Month | 7200 | 2592000 | TRUE | 1 |
| 4 | Past Year | 86400 | 31536000 | TRUE | 1 |
By default, the collection level is set to 1 for each of the four intervals. Using the default level, a vCenter Server will collect data for all performance counters that specify collection level 1. Using the default length value, a vCenter Server will save collection data for the following time periods:
- 5-minute samples for the past day
- 30-minute samples for the past week
- 2-hour samples for the past month
- 1-day samples for the past year
Data older than a year is purged from the vCenter Server database.