emory.<P>


To reduce number of bitmap pages scans, DyBASE associates descriptor with
each page, which is used to remember maximal size of the hole on the page.
Calculation of maximal hole size is performed in the following way:
if object of size <I>M</I> can not be allocated from this bitmap pages,
then maximal hole size is less than <I>M</I>, so <I>M</I>
is stored in the page descriptor if previous value of descriptor is large
than <I>M</I>. For next allocation of object of size greater or
equal than <I>M