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dbms_hang_manager caused db hang 19c

in Database Administration (MOSC) 17 commentsAnswered

19C generated:

DIA0 Critical Database Process As Root: Hang ID 1 blocks 42 sessions

   Final blocker is session ID 996 serial# 46299 OSPID 4861 on Instance 1

   If resolvable, instance eviction will be attempted by Hang Manager

and minutes later, DB, DB server was on hang.

No alert log, incident files kept once server rebooted.

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