mosfit killed by OOM when doing final output and writes nothing to disk

[himisawww]

I guess it is trying to allocate massive memory (O(iterations*walkers)?) when doing output.

This should be avoided.

Also, it says 'All walkers written' but nothing is on disk. (files are all 0 bytes!)

[mnicholl]

There are two things you can do to try to avoid this:

1. Use the -M flag (see docs)
2. Use the dynesty sampler, rather than emcee (provides well sampled posteriors without the need to store the chain)