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  • Enable Rolling History Buffer
    • Enable the Rolling History Buffer to store data in a rolling buffer to cover data loss in a keep alive timeout scenario
  • Rolling History Prune Interval
    • Interval at which to attempt to prune the rolling history buffer in seconds
  • Rolling History Max Age
    • The maximum age allowed of the data in the rolling history buffer in seconds
    Rolling History Prune Quantity
    • Deprecated in release 4.0.19
    • All data older than the Max Age will be pruned at each prune interval
  • Rolling History Prune Quantity (Deprecated in release 4.0.19)


Tip

It can take MQTT Transmission 1.5 times the configured Server Keep Alive time to determined that there is a connection failure. The Rolling History Max Age should be at least 2x the Transmitter Server Keep Alive timeout to ensure that all tag change events are captured during this period. 

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