[erlang-questions] VM with 32MB RAM
Tristan Sloughter
t@REDACTED
Mon Jul 10 20:41:40 CEST 2017
A little fish told me another benefit of embedded mode just now.
In embedded mode there is no code server lookup for an undefined function. So a system that makes use of catching an undef will not be happy once under load and in interactive mode.
--
Tristan Sloughter
"I am not a crackpot" - Abe Simpson
t@REDACTED
On Mon, Jul 10, 2017, at 11:31 AM, Tristan Sloughter wrote:
> It is done by the applications list in the .app files. It isn't possible to check that C will never be used in your example. xref can probably used to find some cases. But it is up to the user to add to the relx config `{exclude_apps, [C]}` which tells relx to not only not include C but also remove C from any .app file that had it listed.>
> --
> Tristan Sloughter
> "I am not a crackpot" - Abe Simpson
> t@REDACTED
>
>
> On Mon, Jul 10, 2017, at 11:24 AM, Dmitry Kolesnikov wrote:
>>
>>> On 10 Jul 2017, at 21.15, Tristan Sloughter <t@REDACTED> wrote:>>>
>>> As for why it defaults to embedded, this is simply because in a release you've built for your project it is expected you have included only what is needed. >>
>> How does it make a decisions what is needed? As far I re-call, it is made at high level only. If you app uses application A that use B and C then all apps are included into release and their code is loaded into memory even if feature of A that uses C is not ever called from my application, right? or it appliance heuristic and pick only the modules that definitely used by the application (in this case C will not be ever included into release)? >>
>> - Dmitry
>>
>
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