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1 About SystemInput Limiter Ramp-up

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Gradually increasing the allowed rate

Ramp-up is an optional procedure that gradually increases the rate that the SystemInput limiter allows — from a small value when a node starts, up to the configured maximum. This allows time for events such as Just-In-Time compilation and cache-loading, before the maximum work rate applies to the node.

Enabling or disabling ramp-up

Below is a summary of what happens depending on whether ramp-up is enabled or disabled.

Enabled Disabled
  • First, Rhino sets the SystemInput limiter's maximum allowed rate to "startRate".
  • Then, every time Rhino processes "eventsPerIncrement" events, with no rejected events, it adds "rateIncrement" to the rate. Rhino counts all events processed, regardless of whether or not they go through the SystemInput limiter.
  • Ramp-up finishes when the current rate reaches the "maxRate" value set for the SystemInput limiter.

Nothing special happens when the node starts — the maximum rate the SystemInput limiter allows is simply "maxRate".
Ramp-up has no effect if the SystemInput limiter's bypassed flag is true.
You configure ramp-up globally, but each node ramps up independently. So if a node restarts, it ramps up again — without affecting other already running nodes.
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