Comment (by Ian Hinder):

I think this is the same as what happens when using tcmalloc and explicitly releasing all excess memory after regridding (see my tcmalloc thorn). But what I really want to know is whether this addresses at all the original problem of runs crashing with OOM. Do you have a test case that crashes with OOM that you can run?

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2194/memory-increase-during-regridding