> As for your suggestion using "saxon:discard-document:" - 
> I applied this
during some test last week but didn't
> see much of a difference in memory
usage. 
> However it was not a controlled environment. I will do some more
test.

Please see http://sourceforge.net/forum/message.php?msg_id=4760399
for details on how to release key data.

P.S. to manage the document pool
you may use api:
http://www.nesterovsky-bros.com/download/saxon.extensions.9.1.zip

defined
in the document-pool.xslt
--
Vladimir Nesterovsky