I am confused with the Oracle Retention Policy,
it said If you are not using a recovery catalog, then you should keep the recovery window time period less than or equal to the value of the control file parameter CONTROL_FILE_RECORD_TIME to prevent the record of older backups from being overwritten in the control file. If you are using a recovery catalog, then make sure CONTROL_FILE_RECORD_KEEP_TIME is greater than the time period between catalog resynchronizations.
I have got no idea what CONTROL_FILE_RECORD_KEEP_TIME can affect recovery window.
And how CONTROL_FILE_RECORD_KEEP_TIME can affect recovery catalog resynchronization.
Hope someone can help. Thanks!