Actually I blog about this topic for the simple reason that currently you won’t find helpful information in MyOracle Support. And I’ve seen this issue now twice in a row at Enterprise customers. You may see AutoUpgrade in trouble when you are short on RAM. During one of the restarts AutoUpgrade initiates you may get an ORA-600.

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What you may see
At first, the alert.log – and this is the strange pattern here – does not give you any indication about this ORA-600. You will find it only in the logs written by autoupgrade.jar:…
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