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Editorial Team
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Asked: 2026-05-25T18:55:21+00:00

I have a ‘worker’ process which I am going to assign to a job.

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I have a ‘worker’ process which I am going to assign to a job. Before I spawn hundreds of processes of this type I would like to know the memory consumption figures for it.

I know that I should sum all the elements which are stored in the process’ loop data (all tuples, atoms, lists, etc) and the actual process memory footprint.

As I understand, before doing that I have to know the actual size of a {tuple|atom|list|process} itself.

Given a certain data structure which is stored in the process’ memory how can I calculate the overall size of the process in memory?

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1 Answer

  1. Editorial Team

    erlang:process_info/2 will give you the amount of memory, in bytes, that a process occupies. For example:

    1> erlang:process_info(whereis(code_server), memory).
{memory,284208}

    Note that binaries are not included since they are not located in the process heap. Those you have to count the size of manually.

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