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  • Writer's picturekyle Hailey

Hung database and can’t connect?

I can be exasperating when the database is slow or hanging and I can’t even connect to see what’s happening. In those cases, here is a trick from Tanel Poder:


If you have such an instance hang you can use a preliminary connection (which starts the process and attaches to SGA, but doesn’t initialize SGA structs nor allocate any state objects): sqlplus -prelim “/as sysdba” oradebug dump latches 1 oradebug dump hanganalyze 4

Here’s a good write up by Arup Nanda

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