NAME

iostat_ios - Show IO-operation latency per low-level block device.

APPLICABLE SYSTEMS

Any Linux system

CONFIGURATION

None needed

USAGE

Link this into @@CONFDIR@@/plugins/ and restart the munin-node.

INTERPRETATION

The plugin shows the average time a IO-operation needs to complete for each disk or block device on the system.

Simple partitioned disks will only show as the whole disk. LVM volumes, RAID devices and other derived block devices are not tracked individually.

When the IO-operation time here increases it is to be expected that the iowait on the CPU graph increases, but please read about how iowait reporting works to fully understand that number.

MAGIC MARKERS

  #%# family=legacy
  #%# capabilities=autoconf

VERSION

  $Id$

BUGS

Should show more useful device names/labels for device-mapper devices, such as those used by LVM and so on.

AUTHOR

(C) 2004 Per Buer. Documentation and some modifications by Nicolai Langfeldt.

LICENSE

GPLv2