[NFS-Ganesha-Devel] disable inode & dirents cache

My FSAL is in the main memory. Should I disable inode and dirents caching? If so, what all I save in terms of memory and open FDs. I am not worried much about saving open FDs but I do not want memory to get occupied without much benefit. How do I disable inode and dirents? Version: 2.8.3 -alok