To properly end a LogMiner session, use the DBMS_LOGMNR.END_LOGMNR
PL/SQL procedure, as follows:
EXECUTE DBMS_LOGMNR.END_LOGMNR;
This procedure closes all the redo log files and allows all the database and system resources allocated by LogMiner to be released.
If this procedure is not executed, then LogMiner retains all its allocated resources until the end of the Oracle session in which it was called. It is particularly important to use this procedure to end the LogMiner session if either the DDL_DICT_TRACKING
option or the DICT_FROM_REDO_LOGS
option was used.