Currently we have a high replication lag at wmflabs.
```
valhallasw@tools-bastion-01:~$ for db in c1 c2 c3; do echo Server: $db; echo "select * from heartbeat_p.heartbeat order by shard" | mysql -h $db.labsdb; done
Server: c1
shard last_updated lag
s1 2016-01-08T20:45:54.000760 0
s2 2016-01-08T20:45:54.001090 0
s3 2016-01-08T20:45:54.001120 0
s4 2016-01-08T20:45:54.001050 0
s5 2016-01-08T20:45:54.000580 0
s6 2016-01-08T19:26:26.001130 4767
s7 2016-01-08T20:45:54.001120 0
Server: c2
shard last_updated lag
s1 2016-01-07T23:43:19.500950 75754
s2 2016-01-08T20:45:54.001090 0
s3 2016-01-08T20:45:54.001120 0
s4 2016-01-08T20:45:54.001050 0
s5 2016-01-08T15:54:56.000540 17457
s6 2016-01-08T20:45:54.001180 0
s7 2016-01-08T20:45:54.001120 0
Server: c3
shard last_updated lag
s1 2016-01-08T20:45:54.000760 0
s2 2016-01-08T20:45:54.001090 0
s3 2016-01-08T20:45:54.001120 0
s4 2016-01-08T20:45:54.001050 0
s5 2016-01-08T20:45:54.000580 0
s6 2016-01-08T20:45:54.001180 0
s7 2016-01-08T20:45:54.001120 0
```