/*
Unformatted Blocks = 0
  FS1 Blocks         = 0
  FS2 Blocks         = 0
  FS3 Blocks         = 0
  FS4 Blocks         = 1
  Full Blocks        = 9

  PL/SQL procedure successfully completed.

  where
  FS1 means 0-25%   free space within a block
  FS2 means 25-50%  free space within a block
  FS3 means 50-75%  free space within a block
  FS4 means 75-100% free space within a block              
*/

set serveroutput on size 10000

 declare
        v_unformatted_blocks number;
        v_unformatted_bytes number;
        v_fs1_blocks number;
        v_fs1_bytes number;
        v_fs2_blocks number;
        v_fs2_bytes number;
        v_fs3_blocks number;
        v_fs3_bytes number;
   v_fs4_blocks number;
   v_fs4_bytes number;
   v_full_blocks number;
   v_full_bytes number;
   begin
   dbms_space.space_usage ('PO', 'PO_LINES_ALL', 'TABLE', v_unformatted_blocks,
   v_unformatted_bytes, v_fs1_blocks, v_fs1_bytes, v_fs2_blocks, v_fs2_bytes,
   v_fs3_blocks, v_fs3_bytes, v_fs4_blocks, v_fs4_bytes, v_full_blocks, v_full_bytes);
   dbms_output.put_line('Unformatted Blocks = '||v_unformatted_blocks);
   dbms_output.put_line('FS1 Blocks	      = '||v_fs1_blocks);
   dbms_output.put_line('FS2 Blocks	      = '||v_fs2_blocks);
   dbms_output.put_line('FS3 Blocks	      = '||v_fs3_blocks);
   dbms_output.put_line('FS4 Blocks	      = '||v_fs4_blocks);
   dbms_output.put_line('Full Blocks	      = '||v_full_blocks);
   end;
/