Persistent change

configuration.md

 ### Configuration
 ## OSD memory Configuration
+# Changing paramenter of a running service
 ```
 ceph daemon /var/run/ceph/ceph-osd.22.asok config show | grep memory
 ceph daemon  osd.22 config set osd_memory_target 2147483648
+```
+# Changing paramenters permanently
+Change the parameters on the admin `ceph.conf` file
+```
+ceph-deploy --overwrite-conf  config push <node>
+
 ```
 ## Crush map
 change the device class of an OSD if needed