doc: fix parameter to set pg autoscale mode

osd_pool_default_pg_autoscale_mode is the right parameter to
set placement-group autoscale mode.

Signed-off-by: Changcheng Liu <changcheng.liu@intel.com>
(cherry picked from commit c0df98fc7e78bbd366333d810f78ddbeed0e6729)

diff --git a/doc/rados/operations/placement-groups.rst b/doc/rados/operations/placement-groups.rst
index c3e60909754acbb81fed9cc3f8fd6f6c6a6aaf11..b50751b13193409615de6cebd80711fe179bfd30 100644 (file)
--- a/doc/rados/operations/placement-groups.rst
+++ b/doc/rados/operations/placement-groups.rst
@@ -29,7 +29,7 @@ For example to enable autoscaling on pool ``foo``,::
 You can also configure the default ``pg_autoscale_mode`` that is
 applied to any pools that are created in the future with::
 
-  ceph config set global osd_pool_default_autoscale_mode <mode>
+  ceph config set global osd_pool_default_pg_autoscale_mode <mode>
 
 Viewing PG scaling recommendations
 ----------------------------------