[erlang-questions] Help with allocator tuning

[Frank Muller]

Hi,

Max: Can you please explain how do you measure that schedulers utilisation,
and ensure it's good (or not)?

Lukas: from where Max was able to derive that 2048 is the best choice for:
+MBsbc, +MBlmbcs and +MBsmbcs?

Erlang memory management is kind of mystery, and I would appreciate if you
can teach us how to figure out the right numbers.

/Frank

Le mer. 23 nov. 2016 à 22:16, Max Lapshin <max.lapshin@REDACTED> a écrit :

> Lukas, thank you a lot!
>
>
> +MBas aoffcaobf +MMmcs 30 +MBsbct 2048 +MBacul 10 +MBlmbcs 2048 +MBsmbcs
> 2048
>
>
> these settings looks very good.  Scheduler utilization is very good now
> (screenshot attached).
>
>
> hugepages are not used, recon_alloc:memory(usage) shows 78%  (rather
> good),
>
> recon_alloc:cache_hit_rates() shows 99%
>
> recon_alloc:sbcs_to_mbcs(current) shows less than 0,2%
>
>
>
> Will check these settings on different installations.
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