“We experienced a production incident where all 4 sets of CL+EL deployed in our system were rebooted simultaneously,” an ethereum staker says, adding:
“This kind of phenomenon was rarely seen before. After investigation, it was found that these BeaconNode Prysm suddenly doubled their memory usage at 2023-05-12 20:12:00 UTC 0, exceeding our memory limit and triggering OOM.
Source: https://www.trustnodes.com/2023/05/12/ethereum-bug-knocks-out-nodes-now-fixed