[erlang-questions] Lager dropping messages

Andrew Thompson <>
Mon Sep 11 21:35:24 CEST 2017


On Mon, Sep 11, 2017 at 06:51:54PM +0000, Frank Muller wrote:
> Thanks for the guidance guys. Kind of lost with my new lager's settings:
> 
> lager,
>     [{error_logger_hwm,30},
>      {async_threshold,500},
>      {async_threshold_window,250},
> 
> I'm still seeing dropped messages :-/
> 
> What the correct settings for let's say 3000 as suggested by Jesper?
> 
> /Frank

You will want to significantly raise the error_logger HWM, the HWM is
how many messages lager will pop from the error_logger mailbox before
starting to discard them.

Also, you might want to try lager 3.x, I landed some fixes to the
error_logger discard code a few months ago:

https://github.com/erlang-lager/lager/pull/411

Andrew


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