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  • Type
    • The type of History Store with options of In-Memory and Disk-Backed
    • Data stored in an In-Memory History Store will not be persisted across a module configuration change, module disable/enable, module restart or power loss. 
    • Data stored in a Disk-Backed History Store will persist across a module configuration change, module disable/enable, module restart or power loss.
  • Message Capacity - deprecated in 4.0.19
    • The maximum number of messages to store before dropping the oldest historical messages
  • History Max Age
    • Maximum number of minutes to store history before dropping the data.
    • Default 44640 (31 days)
  • Flush Period
    • The period to wait in milliseconds between publishes when flushing messages upon reestablishing communication.
    • The publishing of historic data messages is interleaved with the publishing of live data messages. 
    • Default 100

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  • Restart the Injector module
  • Monitor the Injector Info History Store metrics live updates for the count of messages pushed and average size of the messages.
  • Extrapolate based on the test to determine the memory requirement for how long you wish to store the data.

Once you have determined how long you can keep your datathe size of the memory store required, you can configure the History Store setting the History Max Age and Flush Period.

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