Draft Document for Review December 5, 2019 4:33 pm 8456ch_ConfigGUI.fm Figure 11-125 shows a comprehensive view of the available performance functions. To learn how to obtain statistics from the DS CLI, see 12.5, “Metrics with DS CLI” on  page 423. Figure 11-125 Performance monitoring graph comprehensive view 11.13.1 Performance statistics Important:  All of the listed performance statistics are averaged over one minute. The  performance graphs cover data that is collected for the last seven days. For long-term  performance statistics, use IBM Spectrum Control. Users can monitor the following resources and performance metrics: Chapter 11. DS8900F Storage Management GUI  355 GLYPH<SM590000> System performance metrics:  – IOPS: Total number of processed requests in thousand I/O operations per second  (KIOPS) for the selected I/O operations. – Latency: Response time  in milliseconds (ms) for the selected I/O operations. – Transfer Size: Number of kilobytes per I/O operation (KB/operation) for the selected I/O  operations. – Bandwidth: Number of megabytes per second (MBps) for the selected bandwidth type. – Cache: Percentage of read hi ts (read I/O operations that were fulfilled from the system  cache or memory) and write delays (I/O operations that were delayed because of write  cache space constraints or other conditions) during one minute. – Capacity: Total capacity and allocated capacity of the storage system in gibibytes  (GiB). – Power: Power usage of the storage system in watts. – Temperature: Average temperature of the storage system in degrees Celsius.