[erlang-questions] Cost of reduction penalty when sending message to process with long queue

[Lukas Larsson]

The value is gotten here:

https://github.com/erlang/otp/blob/master/erts/emulator/beam/erl_message.c#L434

multiplied here:
https://github.com/erlang/otp/blob/master/erts/emulator/beam/bif.c#L2310-L2311

and then bumped here:

https://github.com/erlang/otp/blob/master/erts/emulator/beam/bif.c#L2374
https://github.com/erlang/otp/blob/master/erts/emulator/beam/bif.c#L2504

Lukas

On Thu, Jun 16, 2016 at 7:25 AM, Max Lapshin <max.lapshin@REDACTED> wrote:

> We have met strange situation when lager_event is overloaded with about
> million of messages and all processes trying to log are mentioned in sys
> monitor with long_schedule warning.
>
>
> I thought that it may be a problem with penalisation of sender with some
> reductions but couldn't find exact formula in OTP sources. Where is it?
>
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