Specifying and adjusting single thresholds

In addition to the global threshold, you can also specify a threshold for each counter in your data view. These thresholds do not affect the scale of the chart. You can specify the thresholds if you view the counters in a non-stacked bar or line chart.

To specify thresholds for the lock and unlock request counters of the My Locking data view:
  1. Display the Thresholds page of the My Locking Properties window.
  2. Under Single thresholds, select the Threshold check box for each counter and specify a threshold:
    • For Lock requests, specify higher than 200 per Minute
    • For Unlock requests, specify higher than 100 per Minute
  3. On the Graphics page, click Line chart as chart type and then click Finish.

You get a line chart with two additional threshold lines in the color of the respective counter. They are at about 20 units for lock requests and about 15 for unlock requests.

If you select a bar chart as chart type, you only see the threshold line if it is exceeded. In this case, the part of the bar exceeding this threshold is shaded.

Later you might want to change the global threshold (next to Static scale on the Thresholds page), which affects the scale of the chart. If you leave the single thresholds as they are, the proportions between the scale and the single thresholds are no longer correct.

To set the proportions right, perform the following steps on the Thresholds page of the Properties window:
  1. Double the number next to Static scale: change 30 to 60.
  2. The Adjust single thresholds button becomes available. Click this button.

    Under Single thresholds, the thresholds for the counters are automatically doubled.

  3. Click Finish.