DBA Maestro - Helpful DBA tips

Below are the steps I followed for patching OMS for OEM 12c R4.  I came across an issue with creating my property file.  I give an example of what it should look like upon completion. Creating the property file :  1. Run the following script to create the WebLogic encrypted configuration and key files. mkdir /app/oracle/Middleware/oms/oms_encr <OMS_HOME>/OPatch/wlskeys/createkeys.sh –oh <full path of platform OMS Oracle Home> -location <location to put the encrypted files> e.g. $OMS_HOME/OPatch/wlskeys/createkeys.sh -oh $OMS_HOME -location /app/oracle/Middleware/oms/oms_encr   Please enter weblogic admin server username: weblogic Please enter weblogic admin server password: Creating the key file can reduce the security of your system if it is not kept in a secured location after it is created. Creating new key... Trying to get configuration and key files for the given inputs... This operation will take some time. Please wait f...

I received the following error in a primary database's alert log that I was supporting recently.   ORA-00312: online log 5 thread 1: '+DATA/db_name/onlinelog/group_5.297.846947859' ORA-00338: log 5 of thread 1 is more recent than control file The database has a DataGuard environment as well and below are the steps that I took to resolve the issue. 1.  First, I checked the status of the redo logs and their current sizes and status. SQL> select group#,bytes/1024/1024,status from v$log;     GROUP# BYTES/1024/1024 STATUS ---------- --------------- ----------------          1              50 INACTIVE          2              50 INACTIVE          3              50 INACTIVE          4             250 INACTIVE   ...