Database Install/Upgrade/Opatch (MOSC)

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Advancing compatible to 12.2.0 makes alter database open slow.

edited Sep 29, 2017 5:05AM in Database Install/Upgrade/Opatch (MOSC) 7 commentsAnswered

I cloned a 12.1.0.2 database with 55000+ datafiles.  Then upgraded it to 12.2.0.1.  Tested a few things.  The last change I made was to advance compatible to 12.2.0 from 12.1.0.2.  After that the database takes 35 minutes to open (it used to take 5 minutes).  It appears to open the datafiles in about 5 minutes as before, but then hangs for another 30 minutes.  All the waiting was from dbw0 waiting on "rdbms ipc reply" while it held a lock on the control file. Anybody else experience this?

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