Dell iDRAC Telemetry Reference Guide
Cumulative System Usage
The provided text describes various cumulative system usage metrics, including CPU, memory, and I/O usage, which are measured as percentage readings and provide insights into system utilization and resource consumption. These metrics, such as CPUUsage, MemoryUsage, and IOUsage, are collected at regular intervals, typically 5 s, and offer a comprehensive view of system performance. The metrics are categorized by type, units, and sensing interval, allowing for detailed analysis and monitoring of system usage.
| Metric Ids | Description | Metric Type | Units | Sensing Interval (seconds) |
|---|---|---|---|---|
| CPUUsage | The combined CPU utilization of all the CPU cores in the system as a percentage reading. Utilization is based on time that is spent in an active state compared to time spent in an inactive state. | Numeric | Percentage (%) | 5 |
| MemoryUsage | There are individual counters to measure memory traffic occurring at each memory channel or memory controller instance. These counters are combined to measure the cumulative memory traffic across all the memory channels on the system. This number is a measure of memory bandwidth consumption and not the capacity of the system memory. | Numeric | Percentage (%) | 5 |
| IOUsage | Each root port in the PCIe root complex has a counter that measures the traffic from or directed to the root port. These counters are combined to measure traffic for all PCIe segments derived from the package. This aggregate number is a measure of PCIe root complex I/O bandwidth utilization for the system. | Numeric | Percentage (%) | 5 |
| AggregateUsage | This value is calculated by combining CPU, memory, and I/O indexes considering the load factor of each resource. The load factor depends on the nature of the workload on the system. | Numeric | Percentage (%) | 5 |
| CPUMaxUsage | CPU Max Usage Percent | Numeric | Percentage (%) | 5 |
| CPUUsageHighFrequency | CPU Usage Percent sampled at higher frequency, that is, 200 ms | Numeric | Percentage (%) | 200 |
| MemoryMaxUsage | Memory Max Usage Percent | Numeric | Percentage (%) | 5 |
| IOMaxUsage | I/O Max Usage Percent | Numeric | Percentage (%) | 5 |
| AggregateMaxUsage | CPU Max Usage Percent | Numeric | Percentage (%) | 5 |
| CPUUsagePctReading | CPU system utilization as percentage reading. Data from RMCs (dedicated chipset Resource Monitoring Counters) for each CPU core is aggregated to provide cumulative utilization of all the cores in the system. This utilization is based on time that is spent in active and inactive states. | Numeric | Percentage (%) | 5 |
| MemoryUsagePctReading | Utilization of memory bandwidth represented in percentage terms. RMCs (dedicated chipset Resource Monitoring Counter) measure memory traffic occurring at each memory channel or memory controller instance. Data from these RMCs is aggregated to measure the cumulative memory traffic across all the memory channels on the system. This measure can indicate if the workload is memory intensive or not. | Numeric | Percentage (%) | 5 |
| IOUsagePctReading | I/O bandwidth utilization for the system as a percentage reading. There is one RMC (dedicated chipset Resource Monitoring Counter) per root port in the PCI Express Root Complex to measure PCI Express traffic emanating from or directed to that root port and the lower segment. Data from these RMCs is aggregated for measuring PCI express traffic for all PCI Express segments emanating from the package. | Numeric | Percentage (%) | 5 |
| SystemUsagePctReading | System utilization aggregates CPU, Memory, and I/O index considering a predefined load factor of each system resource. The load factor depends on the nature of the workload on the system. This represents the measurement of the compute headroom available on the server. | Numeric | Percentage (%) | 5 |
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