Just to follow up on this: I've received a confirmation from TSM level 2 support that BA Client for Linux i386/x64 is 32 bit application and thus fundamentally limited to 4GB RAM.
I've also been given this link <http://www-01.ibm.com/support/docview.wss?uid=swg21197422> that discusses memory requirements of BA client and presents ways to reduce them. -- Warm regards, Michael Green
