The appropriate way to limit memory usage in RabbitMQ is using the vm_memory_high_watermark. You said: I’ve also tried setting the vm_memory_high_watermark to a few different values below the default (of 40%), even as low as 5%. This should work, but it might not be behaving the way you expect. In the logs, you’ll find a … Read more
Escripts support that to some extent but you still need Erlang installed in your machine. See this answer for more information: Elixir or Hex portable package format? EDIT: In 2023, burrito/bakeware are also valid answers, as mentioned by @Dorian.
We should specify that we talk about horizontal scalability of physical machines — that’s the only problem. CPUs on one machine will be handled by one VM, no matter what the number of those is. node = machine. To begin, I can say that 30-60 nodes you get out of the box (vanilla OTP installation) … Read more
First of all, non-blocking I/O has nothing in common with green threads or coroutines, but it can affect how they’re scheduled. Now: Twisted is a classic non-blocking I/O framework — application code is written in async style using callbacks. Gevent and eventlet use the greenlet library for coroutines/greenthreads/greenlets. There is one dedicated greenlet for running … Read more
From http://www.erlang.org/doc/man/lists.html it looks like lists:seq(1, 100) does what you want. You can also do things like lists:seq(1, 100, 2) to get all of the odd numbers in that range instead.
To classify things, lets define the memory layout and then talk about how GC works. Memory Layout In Erlang, each thread of execution is called a process. Each process has its own memory and that memory layout consists of three parts: Process Control Block, Stack and Heap. PCB: Process Control Block holds information like process … Read more
Rather than try to address your specific questions as other answers have already done, I’ll try to explain in simple terms the basics behind behaviors, and let you answer your own questions based on understanding those basics. A behavior is basically a message handling framework, where by “framework” I mean the classical definition of a … Read more
Short answer: no way to know for sure without also knowing the contents of your source file 🙂 There are a few ways to run Elixir code. This answer will be an overview of various workflows that can be used with Elixir. When you are just getting started and want to try things out, launching … Read more
As of Erlang 20.0, the full set of version string tags is: [64-bit] The BEAM emulator is built to make full use of a 64-bit CPU. [async-threads:10] This refers to the number of threads in the Erlang emulator’s async thread pool, which more or less tells you how many blocked system calls can be spun … Read more
To delve into the past: Originally in guards there were only , separated tests which were evaluated from left-to-right until either there were no more and the guard succeeded or a test failed and the guard as a whole failed. Later ; was added to allow alternate guards in the same clause. If guards evaluate … Read more