Monitor Performance

You can monitor the performance levels of all volumes on an array or a specific volume.
  1. Go to Monitor → Performance.
  2. Select one of the following time intervals:
    • Real time
    • One of the predefined time intervals
    • Custom interval
    1. If you selected Real Time, you can click Pause to stop real-time updates and freeze the data on screen.
    2. Click Resume to continue tracking space usage.
  3. Enter the name of the volume that you want to monitor in the Filter by Volume field.
  4. Select the name of the volume you want to monitor from the popup list.
    The following data appears:
    • Latency, which displays the average time that the array takes to internally complete read and write requests
    • IOPS (input/output requests per second), which are a measure of performance and display how many requests per second the array handles
    • MiB/s, which displays the number of mebibytes per second that is being successfully delivered by the array
    • Cache hit rate for random reads, which displays the percentage of read requests that have been received and served by the flash cache

      When the application tries to access data, it first checks the cache. If the data is already in the cache, the data is then displayed. Otherwise the array attempts to access the data from the disk drive. This process is known as a cache hit.