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Swap settings for GPU cluster

ph flag

I am administering a GPU cluster which is MOSTLY used to do Deep Learning and I have limited sys admin knownledge.

I noticed recently that the swap was set to default (swappiness at 40) and that some jobs are fully using it.

At first I was thinking to deactivate the swap since for me use of the swap is slowing down the jobs and we are far from the memory limits.

But I read on some server fault questions that the swap is also used as cache but I am not sure if it is really useful in my case since the drives are quite slow.

My question is how to set correctly the swap should it be deactivated or should it be set to an higher value as 80 or 90.

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