Riverbed AppResponse is designed to provide high-fidelity performance data. For its Standard Groups, which rely on pre-computed aggregates, the system collects and summarizes performance statistics at a base interval of one minute. This is the highest level of granularity available for historical reporting and analysis. All longer-term reporting intervals (e.g., 5-minute, 1-hour) are created by "rolling up" or further aggregating these foundational one-minute data points. Therefore, the minimum possible reporting interval is one minute.

B. 5 minutes: This is a common, but not the minimum, aggregation interval. It is typically a roll-up of five 1-minute data points.

C. 1 hour: This is a long-term aggregation level used for trend analysis over extended periods, far from the minimum available granularity.

D. 6 hours: This represents a very high-level data aggregation, used for capacity planning or long-range historical views, not for detailed analysis.

1. Riverbed AppResponse 11.13.0 User's Guide: In the chapter "Working with Insights," the section "Creating an insight" describes the "Granularity" setting for charts and reports. The documentation and user interface show that the finest available granularity for viewing aggregated data is "1 minute." This reflects the base interval at which statistics are pre-computed. (Reference: Chapter 5, "Working with Insights").

2. Riverbed AppResponse 11 Concepts Guide: The guide explains the data aggregation model, stating that performance metrics are initially stored at the highest resolution (1-minute intervals) and are subsequently rolled up into coarser granularities (5-minute, 1-hour, etc.) over time to manage storage. This confirms that the foundational, minimum interval is one minute. (Reference: Chapter on "Data Collection and Storage").