Chapter 9 High Availability for FortiOS 5.0 : Operating a cluster : HA diagnose commands : stat
  
stat
This command displays some statistics about how well the cluster is functioning. Information includes packet counts, memory use, failed links and ping failures.
diagnose sys ha dump-by stat
HA information.
packet count = 1, memory = 220.
check_linkfails = 0, linkfails = 0, check_pingsvrfails = 2822
bufcnt = -5, bufmem = 0