the system will kill whatever it damn well pleases. You can tune it with priorities to ask it to try to not kill that, and once it kills your sshd once, you'll probably configure it to exempt sshd from being OOM killed at all. That doesn't fix the memory pressure or hanging or stalling, but you'll at least be able to log into the box still instead of dragging out a serial cable.
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the system will kill whatever it damn well pleases. You can tune it with priorities to ask it to try to not kill that, and once it kills your sshd once, you'll probably configure it to exempt sshd from being OOM killed at all. That doesn't fix the memory pressure or hanging or stalling, but you'll at least be able to log into the box still instead of dragging out a serial cable.