Edit a Static Threshold Value

Static threshold policies generate indicatorsClosed An observed change in a specific metric stream that is recognized as being outside of an expected model. Indicators are correlated into triggers, and one or more triggers are grouped into incidents. when a metricClosed A measurement or data point that is monitored and analyzed to detect anomalies and generate incidents. goes above or below a fixed value you set. Those indicators drive incidentsClosed A collection of one or more related triggers. Relationships that cause triggers to be combined into incidents include application, location, operating system, or a trigger by itself. in Riverbed IQ Ops. If the threshold is too low or the measurement rule is too strict, you may miss real problems. If it is too high or too loose, you get noise. The Edit Static Threshold dialog lets you change the threshold value and how many measurements must meet the condition before the platform creates an indicator.

This topic describes how to open the dialog and what each option does. For which metrics use static thresholds and how the page is organized, see Analytics configuration sections and Analytics & Threshold Configuration.

Open the dialog

To open the Edit Static Threshold dialog:

  1. Navigate to the Analytics & Threshold Configuration Page:

    1. Click the Launchpad button ⁝⁝⁝.

    2. Click AI Ops > Analytics & Incidents.

    3. In the Management page, click the Hamburger Icon, then click Analytics & Threshold Configuration.

  2. Go to the Network interfaces or Applications section.

  3. Find a metric that uses the Threshold algorithm (for example In Utilization [Threshold], Out Utilization [Threshold], % Failed Connections [Threshold], MOS [Threshold], or % Total Retrans [Threshold]).

  4. Click Edit on that row.

The Edit Static Threshold dialog opens with the metric name in the title. For the full list of metrics and sections, see Analytics configuration sections.

Dialog settings

The dialog has two main parts: the threshold value and the measurement rule.

Generate indicator when [metric] above/below: Enter the numeric threshold. The label shows either "above" or "below" depending on the metric (for example "above" for utilization, "below" for MOS). The unit (e.g. % or seconds) appears next to the field when it applies. The platform generates an indicatorClosed An observed change in a specific metric stream that is recognized as being outside of an expected model. Indicators are correlated into triggers, and one or more triggers are grouped into incidents. when the metric crosses this value according to the measurement rule you choose.

Measurement rule: Choose when the condition must be satisfied:

  • A single measurement: One measurement above or below the threshold is enough to generate an indicator. Default.

  • Consecutive time periods: The metric must be above or below the threshold for a set number of consecutive periods. Use the For field to enter that number.

  • N out of M time periods: The metric must exceed the threshold in N of the last M measurements. Enter N in the first field and M in the second (e.g. two out of three). N must be less than or equal to M. M has a maximum of ten. When M is greater than one, N must be at least two. For more on N of M, see N of M parameters.

Click Apply to save. Click Reset To Default to restore the built-in policy (if the policy is user-modified). Click Cancel or close the dialog to discard changes.