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Performance counters are modeled using the PerfCounterInfo data object type. Each instance of a PerfCounterInfo data object contains metadata about a specific metric available from the system. The storage adapter group of performance counters supports real-time performance metrics (such as latency and read- and write-speeds) for I/O operations on storage adapters. |
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| Counter | StatsType | Unit | Levels | RollupTypes | Labels | Entity | |||
|---|---|---|---|---|---|---|---|---|---|
| V | H | R | C | ||||||
| read | rate | kiloBytesPerSecond | 2 | average | Read rate | ο | • | ο | ο |
| Rate of reading data by the storage adapter. | |||||||||
| write | rate | kiloBytesPerSecond | 2 | average | Write rate | ο | • | ο | ο |
| Rate of writing data by the storage adapter. | |||||||||
| numberReadAveraged | rate | number | 2 | average | Average read requests per second | ο | • | ο | ο |
| Average number of read commands issued per second by the storage adapter during the collection interval. | |||||||||
| numberWriteAveraged | rate | number | 2 | average | Average write requests per second | ο | • | ο | ο |
| Average number of write commands issued per second by the storage adapter during the collection interval. | |||||||||
| totalReadLatency | absolute | millisecond | 2 | average | Read latency | ο | • | ο | ο |
| Average amount of time for a read operation by the storage adapter. Total latency = kernel latency + device latency. | |||||||||
| totalWriteLatency | absolute | millisecond | 2 | average | Write latency | ο | • | ο | ο |
| Average amount of time for a write operation by the storage adapter. Total latency = kernel latency + device latency. | |||||||||
| commandsAveraged | rate | number | 2 | average | Average commands issued per second | ο | • | ο | ο |
| Average number of commands issued per second by the storage adapter during the collection interval. | |||||||||