Determining Device I/O Response and I/O per Second

Determine how long it takes a device to respond to I/O requests and what its I/O rate is.

High response time can indicate problems in the functioning of the physical device or the storage layer, problems with the configuration of the storage layer, or that the device is busy.

  1. In the Perspective Resources view, select the server to monitor, click the drop-down arrow, and select Monitor.
  2. In the left pane, select Devices.
    You can also display the Devices screen by clicking a Devices link on another window in the SAP Adaptive Server Enterprise monitor view.
  3. (For shared-disk clusters only) Select Global to display global devices, and Local to display devices for instances of SAP ASE clusters.
  4. In the Devices table, select the device to monitor.
  5. The IO Response Time column and the Device IO/Sec graph on the Details tab shows detailed I/O activity for the selected device.
Related tasks
Modifying Device Sizes
Related reference
Device Statistics and Details