## Query to monitor "row migration".

    SELECT SUBSTR(ROWID, 1, 8) BLK  
    FROM   __table_name__
    GROUP 
        BY SUBSTR(ROWID, 1, 8)
    HAVING
           SUM(NVL(VSIZE(COL1) + 1, 0) 
             + NVL(VSIZE(COL2) + 1, 0) 
             + .....
             + NVL(VSIZE(COL9) + 1, 0) + 5) > 'BLOCK_SIZE' - 100;