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# Create a performance threshold alert

The Unisphere Performance Management application allows the user to gather, view, and analyze performance data to troubleshoot and optimize the storage systems.

## About this task

You can use the default system values for thresholds and alerts, or create your own. When you set threshold values, you can optionally view them when you create charts for performance metrics in the Diagnostic view.

To create performance threshold alerts:

## Steps

1. Select .
2. Select Alerts > Performance Thresholds and Alerts.
3. Select a storage system.
4. Select the category for which you want to create a threshold or alert.
5. Click Create.
6. In the Set Thresholds section, select the System, Category, and Metrics.
   You can select KPI or All to display the appropriate metrics in the list.
7. Configure a value for First Threshold or First Threshold and Second Threshold.
8. In the Trigger Alert section, select Trigger an alert when the thresholds are exceeded.
9. To have a real-time trace started automatically when a second threshold is reached, select Create a real time trace when a Critical alert is triggered.
   In Real Time Traces list, real time traces created in this way have "Alert:" in the description. By default, those traces are retained for three days.
10. For each threshold you configure, specify values for the following fields:

    Severity | The following values are available: Information Warning Critical
    Occurrence | The number of occurrences in the data samples which must happen before the alert is triggered. For example, if the threshold is breached three times out of five samples, an alert is initiated.
    Samples | The number of data collection samples over which the occurrences can occur before the alert is triggered. For example, if the threshold is breached three times out of five samples, an alert is initiated. The samples are based on the STP (DCF file) collection interval for performance stats. This interval is typically five minutes by default, but you can choose to collect in 10 minutes or 15 minute intervals. The samples are based on the performance collection interval, so typically one sample = one 5 min interval. As Unisphere processes the statistics to save to the performance database, it checks to see if any performance thresholds have been breached. For example, if after processing three 5 min intervals and the threshold for a particular statistic was breached in each of those intervals, then an alert would be triggered.

11. Click OK.