Data collection is timer-driven as well as event-driven. Most data items are collected exclusively at the end of each major sampling interval. However, a Performance Agent collects a subset of items for the metrics record and process record at the end of each minor sampling interval.
A Performance Agent collects the items from the process record at the end of each major interval (as specified by the interval parameter in the collection definition) and whenever any image terminates. Several data items in the process records, collected during minor interval sampling (every five seconds), are moving averages. These averages represent the data for the duration of the major interval or interval portion, during which a specific image was in effect. The Performance Agent resets all moving averages at each image termination.
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