delphi 2005, doa 4.0.7.1, oracle 10.0.2.1 db/client

i use a TOracleDataSet with TDataSource, about 30 Fields and 50 rows per refresh.
any time i do a Toracledataset.refresh and i do almost every second my process memory increases 16KB. this results in an out of memory case after a couple hours of running my application.

i tried to change readbuffer from 25 downto 1, but theres is still a memory increase of about 4KB.

please help, i