new space for allocation the page copy, and we can reuse space of
deallocated objects. And it is not acceptable due to the reason explained
above - we will loose database consistency. That is why deallocation
of object is done in two steps. When object is cloned, all bitmap pages
used for marking objects space, are also cloned (if not
not cloned before). So when transaction is committed, we only clear bits in
bitmap pages and no more requests for allocation memory can be generated at
this moment.<P>

After 