MATLAB: Parfeval memory leak? Clear memory on parallel workers

Question

Hi,

I have some sort of memory leak when using parfeval.

I have a function that starts a number of parfeval-computations and then uses fetchNext in a loop to retrieve all results.

The memory taken up by the Matlab instances in my parallel pool grows with each execution of the function that uses parfeval.

My question: Am I doing something wrong? Do I have to explicitly clear the memory of the workers after using parfeval? How do I do this? I tried "pctRunOnAll clear all" but it did not free up any memory on the workers (just the client instance).

Right now, the only way I can clear this memory is to shut down and re-start my parallel pool, but that's not a feasible solution for my application.

Thanks, Matthias

Answer 1

Please could you try applying the workaround from this bug report. (The bug report mentions mapreduce, but it includes a fix that affects only parfeval).