Virtualization Manager collects historical information about resources, and is most effective when enough time has elapsed to create a large base for comparison.
For example, I/O latency data are not available until sufficient data have been collected, and the accuracy of the information increases as more data are gathered. The historical performance analyzer charts provide in-depth views to issues and trends in resources.
Performance data that can be visualized over time includes:
To view data for an object, select one or more objects, and click Add to Chart.
The performance chart will be displayed.
Click to view the component values as a stacked chart.
All lines on the performance charts include an optional best fit line that shows a flat line which best fits the points for that metric. Select Best Fit at the top of the chart to display this line.
The best fit line is useful if there is an underlying long term trend in resource utilization. For some resources, for example, disk space, this is almost always the case. For others, for example, CPU, it only applies if the externally applied system load is driving a trend in the data set. The calculation is done on the data range selected in the graph. Hover over the best fit line to see additional details.
For any metric that is a percentage of total resources, the best fit line also includes an estimate for when that value will reach 100%.
Select the options above a chart to display additional data.