[erlang-questions] Garbage collection

Chandru chandrashekhar.mullaparthi@REDACTED
Fri Oct 31 10:51:29 CET 2014

Thank you Lukas.

On 31 October 2014 09:37, Lukas Larsson <lukas@REDACTED> wrote:

> Hello,
> On Fri, Oct 31, 2014 at 10:20 AM, Chandrashekhar Mullaparthi <
> chandrashekhar.mullaparthi@REDACTED> wrote:
>> I have a question about beam’s GC implementation. When an erlang process
>> is being GCed, is the processing required to do the GC taken out of the
>> process’s 2000 reduction quota, or is it done after a process has been
>> scheduled out?
> The GC work is taken out of the process' reductions. The GC is never
> triggered when it is scheduled out, but it can be triggered before being
> scheduled in, in which case the newly allotted reductions will be reduced
> by the GC work.

So what happens if the process has a large heap? Can the GC end up taking
more time than to execute 2000 reductions? Or is it somehow time bounded?
If it is not time bounded, it explains a lot of the problems I'm seeing on
a system.

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