Somewhat regularly, I get "relay unresponsive" with a heartbeat delta of about 12seconds.

Could this mean my upload pipe is still saturated and I need to throttle back slightly?

recent arm log: 13:12:56 [ARM_NOTICE] Relay resumed [6 duplicates hidden] 13:12:31 [ARM_NOTICE] Relay unresponsive (last heartbeat: Sat Feb 22 13:12:20 2014) 12:11:34 [ARM_NOTICE] Relay unresponsive (last heartbeat: Sat Feb 22 12:11:20 2014) 11:10:33 [ARM_NOTICE] Relay unresponsive (last heartbeat: Sat Feb 22 11:10:20 2014) 09:30:24 [NOTICE] Heartbeat: Tor's uptime is 2:18 hours, with 146 circuits open. I've sent 14.23 GB and received 9.69 GB. 09:09:20 [ARM_NOTICE] Relay unresponsive (last heartbeat: Sat Feb 22 09:09:07 2014) 09:08:30 [ARM_NOTICE] Relay unresponsive (last heartbeat: Sat Feb 22 09:08:19 2014) 07:16:39 [NOTICE] Self-testing indicates your DirPort is reachable from the outside. Excellent. 07:12:43 [NOTICE] Performing bandwidth self-test...done. 07:11:31 [NOTICE] Self-testing indicates your ORPort is reachable from the outside. Excellent. Publishing server descriptor. 07:11:26 [NOTICE] Your IP address seems to have changed to 203.158.36.137. Updating. 07:09:25 [ARM_NOTICE] Relay unresponsive (last heartbeat: Sat Feb 22 07:09:12 2014) 07:08:04 [ARM_NOTICE] Relay unresponsive (last heartbeat: Sat Feb 22 07:07:51 2014) 03:30:24 [NOTICE] Heartbeat: Tor's uptime is 5:52 hours, with 189 circuits open. I've sent 12.95 GB and received 12.78 GB.