Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/doc/mgr/iostat.rst b/doc/mgr/iostat.rst
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+.. _mgr-iostat-overview:
+
+iostat
+======
+
+This module shows the current throughput and IOPS done on the Ceph cluster.
+
+Enabling
+--------
+
+To check if the *iostat* module is enabled, run::
+
+  ceph mgr module ls
+
+The module can be enabled with::
+
+  ceph mgr module enable iostat
+
+To execute the module, run::
+
+  ceph iostat
+
+To change the frequency at which the statistics are printed, use the ``-p``
+option::
+
+  ceph iostat -p <period in seconds>
+
+For example, use the following command to print the statistics every 5 seconds::
+
+  ceph iostat -p 5
+
+To stop the module, press Ctrl-C.