Viewing Performance Data

The Performance tab shows performance data for the selected server or virtual machine in graph form.

For servers you can view:

  • CPU, memory and network I/O usage data, and you can add graphs showing additional resource usage data, if required. For example, you can include the Control Domain Load: this is the average (Linux loadavg ) of the number of processes queued inside the XenServer Control Domain (dom0) over the last 5 minutes.
  • Lifecycle events for all the VMs hosted on the server are shown in the VM Lifecycle Events pane.

For virtual machines, graphs showing CPU, memory, network I/O and disk usage data are shown by default.

At the bottom of the tab, the summary graph gives a quick overview of what has been happening on the machine and also allows you to adjust the time frame shown in the other graphs, either to show data from a longer or shorter period of time, or to show data from an earlier period of time.

To include other types of performance data on the tab or to change the appearance of the graphs, see Configuring performance graphs.

To view data from a longer or shorter time period

By default, data from the last 10 minutes is displayed. To view data from a longer or shorter time period, do one of the following:

  • To view available performance data for the last hour, 24 hours, week month or year, click Zoom and then select 1 Hour , 1 Day , 1 Week , 1 Month or 1 Year.
  • To resize the time period displayed in the graphs, in the summary graph, point to the vertical split bar at the edge of the sample area. When the pointer changes to a double-headed arrow Resize Cursor , drag the vertical split bar right or left. For example: Two images. The top shows a 10 minute interval selected with the resize cursor hovering over on end of the timeframe. The second image is afer the resize cursor has been used. The window has been enlarged to 40 minutes.

To view data from a different time period

To move the time frame for data displayed in the graphs, point to any graph and when the pointer changes to a move cursor Move Cursor. An equal armed cross with an arrowhead at each line end. , simply drag the graph or the sample area in the summary graph to the left or right. For example: Two images. The top shows a 40 minute interval selected with the move cursor. An arrow on the diagram indicates the direction that the cursor is to be moved.  The second image is afer the move cursor has been used. The window has been shifted to highlight an earlier 40 minutes.

To view VM lifecycle event data on a server

To view lifecycle events for the VMs hosted on a server, use the VM Lifecycle Events list.

  • Each event has a tooltip with the full message for that lifecycle event (“Virtual Machine ‘Sierra’ has been started”).
  • You can use the cursor keys to navigate the items in list.
  • Double clicking or pressing Enter will zoom the graphs to the point when the selected lifecycle event occurred.
  • Selecting (single click or highlight with cursor keys) one of the events causes the lifecycle event on the graph itself to be highlighted.