Memory consumption by HANA processes

Hi

I'm playing with HANA SPS6 Developer Edition on Cloudshare. While about 19.5 GB RAM is available from the OS point of view, as can be seen in "free -m" output, most of this memory is allocated by HANA processes themselves. Actually, I see that less than 3GB is available for user data and it is very tight restriction, especially given the in-memory nature of HANA.

I wonder if it is possible to decrease the memory allocation by some HANA processes, except hdbindexserver of course. How can I check if the memory allocation by various HANA processes is adequate? Is it possible to change it?

Thanks in advance