This parameter defines additional directories where Oracle trace files are to be deleted. By default, Oracle 11g trace files are only removed from the following directories and their subdirectories:
<diagnostic_dest>/diag/rdbms/<DB_name>/<INST_NAME>
When this parameter is set, Oracle 11g trace files are also removed from the subdirectories alert, cdump, hm, incident, incpkg, ir, lck, metadata, sweep, stage, and trace of the specified directories.
cleanup_ora_sdir = (<ora_trace_sdir1>, <ora_trace_sdir2>, ...)