V$SQL_JOIN_FILTER displays performance information about the characteristics of join filters when they are used for a parallel cursor. (A join filter is a bitmap filter applied to table rows prior to a join operation in order to avoid parallel communication.)
QC (Query Coordinator) session ID of the given cursor for the given parallel query
QC (Query Coordinator) instance ID of the given cursor for the given parallel query
SQL plan hash value of the given cursor for the given parallel query
Total size of the join filter field
Number of bits set in this filter
Number of rows seen by the join filter
Number of rows of the right table that have be tested against the bitmap filter. This is the sum of the filtered rows plus the non-filtered rows.