TrackerImpl config

Questions
1

I’m a newbie that got dropped into trying to quickly muster some support for questions coming out of a production upgrade.

The file sandbox/src/main/scala/com/digitalasset/platform/apiserver/services/tracking/TrackerImpl.scala defines an object TrackerImpl.

(1) What role does this object play?
(2) It appears to host a couple of fixed size input queues where the size is determined by configuration constants:

 final case class Configuration(
      ledgerId: LedgerId,
      inputBufferSize: Int,
      maxCommandsInFlight: Int,
      limitMaxCommandsInFlight: Boolean,
      retentionPeriod: FiniteDuration,
      // TODO(RA): this should be updated dynamically from the ledger configuration
      maxDeduplicationTime: java.time.Duration,
  )

I presume this all relates to ledger configuration. Are these constants configurable from the ledger command line? How does one manipulate them?

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2

daml sandbox --help probably puts it best. :smiley:

--max-commands-in-flight <value>
The maximum number of unconfirmed commands in flight in CommandService.

The default should be 256.

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3

Yes, but in fact it is the inputBufferSize: Int, one I have an interest in. I did of course look at the help :wink:

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4

That is not configurable via the CLI.

5

Rather suspected it wasn’t. Should it be? Perhaps it’s intimately related to other parameters from which it can thus be deduced in which case no I guess?

6

I agree it should be configurable. Perhaps if you have further points we can merge this discussion in this other thread where this point popped up. :slightly_smiling_face:

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7

I’m satisfied and happy for this thread to be merged. Thank-you!

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