res writing about 10 pages in random places in the file).
But it is possible to dramatically increase update performance if you group several updates in 
one transactions. DyBASE is creating shadow of the object when it is
first time updated inside transaction. If object will be updated once in N transactions, 
then N shadows will be created. If object will be updated N times inside one transaction, then
shadow will be created only once. It explains advantage of having one large transaction.<P>

But if you 