- users
Users currently logged in.
+ - varnish
+ Various statistics from Varnish, an HTTP accelerator.
+
- vmem
Virtual memory statistics, e. g. the number of page-ins/-outs or the
number of pagefaults.
- wireless
Link quality of wireless cards. Linux only.
+ - wpar
+ CPU usage, memory utilization and system load of AIX's “Workload
+ Partitions” (WPAR).
+
- xmms
Bitrate and frequency of music played with XMMS.