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Monthly Archives: April 2020

Home / 2020 / April

How to drop EM13c repository – the nice way

If you want to cleanup your EM13c installation, you would like to drop EM repository information as well. This is the way to do it: Have fun!

April 23, 2020mardaffEM13cRepManager, repository

ORA-16623: member detected role change

Playing with dataguard failover scenarios I bumped into this error: That’s due to inconsistent information within the broker files from both servers. To fix this, we can do this:

April 12, 2020mardaffDatabase, DataguardDGMGRL, ORA-16623, ORA-16623: member detected role change

TNS-12564: TNS:connection refused while reinstating a failed database

One of the reasons for getting this error might be that the sqlnet.ora does not contain the proper settings like in this particular case: As you can see there is nothing set in sqlnet.ora. Therefor when I was trying to reinstate a former PRIMARY as STANDBY, I was seeing in alert log of the reinstated…

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April 12, 2020mardaffDatabase, DataguardDGMGRL, TNS-12564, TNS:connection refused

13.4: Installing OMS to 13.4 Fails With Error: Check if all adaptive features parameters are unset

I was trying to install EM13 v4 and I got the following error: I’m using Oracle 19c as repository database. The solution for this is: And restart the database 🙂

April 4, 2020mardaffEM13c, OEMadaptive features, EM13.4
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