[Yaffs] Yaffs tunning

Hi,

I am trying to reduce the RAM consumption on my system which is using Yaffs2 on a RTOS.
Is it safe to reduce YAFFS_N_TEMP_BUFFERS, YAFFS_ALLOCATION_NOBJECTS, YAFFS_ALLOCATION_NTNODES and YAFFS_ALLOCATION_NLINKS?
Do you have advices about it?

Thanks in advance,

Julien