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I just searched to see what Ceph reccomended, and here is the funny part: -- Configuring the operating system with swap to provide additional virtual memory fo

I just searched to see what Ceph reccomended, and here is the funny part: -- Configuring the operating system with swap to provide additional virtual memory for daemons is not advised for modern systems. Doing may result in lower performance, and your Ceph cluster may well be happier with a daemon that crashes vs one that slows to a crawl. -- If a single ceph node crashes and restarts, I assume that the cluster will pick up the slack and heal/deal?

patrakov 2y ago
Correct. A node that crashed quickly (or where earlyoom killed something - I am looking at you, https://tracker.ceph.com/issues/48673 https://tracker.ceph.com/issues/48673) is visible only as a monitoring alert that goes away by itself, because all Ceph daemons are configured to be restarted after a crash by default. A slow/swapping node, on the other hand, leads to customer or end user complaints.