- 'CDEF:free_cached_buffers_used=free_avg,cached_avg,+,buffers_avg,+,used_avg,+',
- 'CDEF:cached_buffers_used=cached_avg,buffers_avg,+,used_avg,+',
+ 'CDEF:cached_avg_nn=cached_avg,UN,0,cached_avg,IF',
+ 'CDEF:buffers_avg_nn=buffers_avg,UN,0,buffers_avg,IF',
+ 'CDEF:free_cached_buffers_used=free_avg,cached_avg_nn,+,buffers_avg_nn,+,used_avg,+',
+ 'CDEF:cached_buffers_used=cached_avg,buffers_avg_nn,+,used_avg,+',