ration is performed and all dirty pages should
be flushed on the disk. When all cloned objects are placed sequentially,
number of modified pages is minimal and so transaction commit time is also
reduced. Using extension quantum also helps to
preserve sequential allocation. Once bitmap is extended, objects will
be allocated sequentially until extension quantum will be completely used.
Only after reaching the end of the bitmap, scanning restarts from the beginning
searching for holes in previously allocated m