On Wed, Jun 17, 2015 at 09:20:33AM -0400, Vivek Goyal wrote: > I think it would be reasonable use "pid" as program_id when different > instance of same program want to keep track of different regions of > disk. Nothing stops you from doing that; just pass e.g. "mylvmstat$PID" as the program_id. Regards, Bryn.