VM Disk Activity

VM Disk Activity report reveals disk I/O performance statistics. This report is helpful for diagnosing read and write latency.

Slow read and write speeds can be indicators of VM memory exhaustion. Use this report together with the VM Memory Utilization report.

Virtual Machine. Device name/CPU type (CPU index in parenthesis).
Read: 1 Hour Avg. Average disk read rate.
Read: 1 Hour Max. Peak disk read rate observed in last hour.
Read: Hour Current. Last observed disk read rate.
Write: 1 Hour Avg. Average disk write rate.
Write: 1 Hour Max. Peak disk write rate observed in last hour.
Read: Hour Current. Last observed disk read rate.
Poll Time. Date and time group of last poll.

Generate a report

Choose device. Choose one or more host devices you want to see VM Disk Activity measurements for.

Choose time constraints. Choose times for the VM Disk Activity. (For recently observed measurements, select Last Polled from the Date Range drop down list.)

Filter and reduce by row and by column. Sort and remove columns, group rows based on specific column values, and remove noise and chaff from the table.

Chart, adjust output, and visualize. Fine tune report presentation and range of values displayed using the Report Settings dialog (optional).

Note: This report only returns VM Disk Activity metrics for virtual machines when vCenter or Hyper-V hosts already have the appropriate WMI or SNMP credentials. For more information, see Using Credentials.

Hyper-V Considerations

To return each Hyper-V virtual machine's metrics in this report, VM Disk Activity monitoring needs to be switched on in the virtual machine's Monitor Setup page . For more information, see Hyper-V Disk Activity Monitor.

Print, share, and export

Generated VM Disk Activity report data can be visualized, shared, and reused:

Print. Print grid and chart views.
Share. Share VM Disk Activity reports with other users in a single or combined view.
Export. Export VM Disk Activity data and leverage outside of WhatsUp Gold.

Control	Purpose
Device	Browse and choose a single device.
Single Interface	Choose an interface on a device.
Device Group	Choose an existing group of one or more devices. You can also create custom or dynamic groups.

Control	Purpose
Date Range	Choose or define an overall date range.
Business hours	Focus on specific days of the week and periods within each day. Reveal trends that are sensitive to business hours, time zones, and other periodic attributes in the observed data.

Control	Purpose
Sort.	Sort column in ascending or descending order.
Columns.	Pick the columns you want to view. Click a check box to display the column. Clear the check box to hide it.
Group by this field.	Group table into collapsible rows wherever the current column contains identical data ("field") values.
Filters.	Provide a keyword to view only rows that contain the keyword for this column.

Control	Purpose
Show Top n Items	Limit items to the samples with the highest utilization.
Threshold Type	Switch between minimum or maximum mode for cutoff values for the ranked list. At or Over. Show peak usage period. (Utilization percentage equal to or greater than Threshold.) At or Under. Show usage periods where resources are unused or possibly down. (Utilization percentage equal to or less than Threshold.)
Threshold (percent)	Baseline value used to trim devices at peak or subpeak capacity from the Top n list.

Control	Purpose
Display Options	Present data as a chart, a table grid, or both.
Chart Type	Line/Area. Scatter graph that connects adjacent measurements with straight lines. Spline/Area Spline. Choose a graph with a smoothed appearance where adjacent samples exhibit a gradual slope.
Chart Options (percent)	Legend, Grid Lines, Range Selector. Include legend, grid lines, and range selector for readability. Trend Lines. Present data with a smoothed average to show trend.

VM Disk Activity

Generate a report

Choose time constraints for data view

Filter and pick by column

Specify threshold and top n:

Chart and visualize data over time (time series graph)

Hyper-V Considerations

Print, share, and export