Page History

...

The PickN will only update when N events have been collected. There is no guarantee on the order in which events are collected . (the collectors can, in some cases, throw away events that are "old", but it's not perfect).

RollingBuffer

Use-case summary: Use RollingBuffer like a circular buffer (or first-in-first-out buffer) that keeps a finite number of events.  The ami graph output updates every event.

...