NCD – Examining VM Performance Metrics
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Move your mouse pointer within the graph and the system displays the CPU, memory, and network performance numbers for each point along the timeline.
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Use the toggle switch above the graph labeled "Last hour / 24 hours" to switch the time frame for which the system displays performance data.
A control on the graph's horizontal axis enables you to zoom the timeline's interval units to your needs. Drag your mouse pointer rightward to select a time range into which the horizontal axis should drill down. The timeline axis and graph display changes accordingly.
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Click the (conditionally displayed) Reset zoom button in the graph area's upper right to return the graph and timeline axis to pre-zoom state.
Video demonstration of use of graph's zoom control: