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ORA-06580:

Hash Join ran out of memory while keeping large rows in memory
Cause: Hash Join reserves 3 slots (each slot size = DB_BLOCK_SIZE * HASH_JOIN_MULTIBLOCK_IO_COUNT) for a row. If a row is larger than that, this error will be raised.
Action: Increase HASH_JOIN_MULTIBLOCK_IO_COUNT so that each joined row fits in a slot. HASH_AREA_SIZE may also need to be increaed.