- chrony
Chrony daemon statistics: Local clock drift, offset to peers, etc.
+ - connectivity
+ Event-based interface status.
+
- conntrack
Number of nf_conntrack entries.
Acts as a StatsD server, reading values sent over the network from StatsD
clients and calculating rates and other aggregates out of these values.
+ - sysevent
+ Listens to rsyslog events and submits matched values.
+
- swap
Pages swapped out onto hard disk or whatever is called `swap' by the OS..