PCTUSED & PCTFREE Q's

This might sound too simple question to answer But still need an explanation

Assume the following

PCTFREE 15 --> which means that ORACLE Datablock will be used to insert rows

               till atleast 15% of the space in the block is free - right ?
               And after that the remaining 15% is set aside for only updates.

PCTUSED 40 --> Which I suppose means that once Datablock is 85% full ( because
               PCTFREE is 15 ) - NO MORE ROWS would be inserted into that block
               till used part of the block falls below 39% - right ?

Does this mean that once Datablock is 85% full - we are actually setting aside 60% of space in the block ?? - By waiting for used part of the block to fall below 39% ??

Now my question is - Doesn't it contradict PCTFREE 15 - i.e., only 15% is set aside and implies that it should be able to INSERT ROWS as long as used part of the block is less than 85 % as against 39 % ?

Any insights appreciated

JP
~ Received on Wed Oct 25 1995 - 00:00:00 CET