Support for device-mapper statistics facility (`dmstats`)
The Red Hat Enterprise Linux 6.8 release supports a device-mapper statistics facility, the `dmstats` program. The `dmstats` program displays and manages I/O statistics for user-defined regions of devices that use the device-mapper driver. The `dmstats` program provides a similar functionality to the `iostats` program, but at levels of finer granularity than a whole device. For information on the `dmstats` program, see the `dmstats`(8) man page.