- "DS:bits:COUNTER:$heartbeat:0:U",
- "DS:pkts:COUNTER:$heartbeat:0:U",
- "DS:dropped:COUNTER:$heartbeat:0:U",
- "DS:overlimits:COUNTER:$heartbeat:0:U",
- "DS:lended:COUNTER:$heartbeat:0:U",
- "DS:borrowed:COUNTER:$heartbeat:0:U",
- "DS:giants:COUNTER:$heartbeat:0:U",
- "DS:backlog:GAUGE:$heartbeat:0:U",