[erlang-questions] How to tune erlang memory allocator to use 25 GB of ram and stop munmaping it?

[Lukas Larsson]

Looking quickly at the binary_alloc info you have a lot of the data
allocated by sys_alloc. sys_alloc uses malloc directly, so there is no
cache there. Maybe try setting +MBmmsbc 2048, I got 2048 by adding
mseg_alloc_carriers to sys_alloc_carriers for sbcs and then adding a small
buffer.

Lukas


On Wed, Aug 14, 2013 at 4:41 PM, Max Lapshin <max.lapshin@REDACTED> wrote:

> I'm running erlang R16B01 on Debian linux (kernel 3.2.0)
>
>
> Here is my binary allocator info:
> https://gist.github.com/maxlapshin/6231659
>
> here is mseg_allocator:  https://gist.github.com/maxlapshin/6231710
>
> I've restarted erlang with +MMmcs 30:
>
> erts-5.10.2/bin/beam.smp -K true -A 160 -MMmcs 30 -stbt s -- ...
>
> Looks like number of mmap/munmap has lowered.
>
> Will try to understand this allocator information.
>
>
>
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