XenServer Administrator's Guide
Workload Balancing
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• When the Average Usage line intersects with the Average Critical Threshold Percent (red), this indicates the days when the average resource utilization met or exceeded the Critical threshold value for that resource. If you find the data points in the majority of your graphs are not in the Average Medium Threshold range, but you are satisfied with the performance of this pool, you might need to adjust the Critical threshold for this pool. For more information, see the section called “Changing the Performance Thresholds and Metric Weighting”.
Virtual Machine Motion History This line graph displays the number of times virtual machines moved on a resource pool over a period of time. It indicates if a move resulted from an optimization recommendation and to which host the virtual machine moved. This report also indicates the reason for the optimization. You can use this report to audit the number of moves on a pool. Some points about interpreting this report: • The numbers on the left side of the chart correspond with the number of moves possible, which is based on how many virtual machines are in a resource pool. • You can look at details of the moves on a specific date by expanding the + sign in the Date section of the report.
Virtual Machine Performance History This report displays performance data for each virtual machine on a specific host for a time period you specify. Workload Balancing bases the performance data on the amount of virtual resources allocated for the virtual machine. For example, if the Average CPU Usage for your virtual machine is 67%, this means that your virtual machine was using, on average, 67% of its virtual CPU for the period you specified. The initial view of the report displays an average value for resource utilization over the period you specified. Expanding the + sign displays line graphs for individual resources. You can use these graphs to see trends in resource utilization over time. This report displays data for CPU Usage, Free Memory, Network Reads/Writes, and Disk Reads/Writes.
Administering Workload Balancing Some administrative tasks you may want to perform on Workload Balancing include disabling Workload Balancing on a pool, pointing a pool to use a different Workload Balancing server, and uninstalling Workload Balancing.
Disabling Workload Balancing on a Resource Pool You can disable Workload Balancing for a resource pool, either temporarily or permanently: • Temporarily. Disabling Workload Balancing temporarily stops XenCenter from displaying recommendations for the specified resource pool. When you disable Workload Balancing temporarily, data collection stops for that resource pool. • Permanently. Disabling Workload Balancing permanently deletes information about the specified resource pool from the data store and stops data collection for that pool. To disable Workload Balancing on a resource pool