diff --git a/plugin_source/deployment_scripts/compute_post_deployment.py b/plugin_source/deployment_scripts/compute_post_deployment.py
index c9f4f1c..e2c5b4a 100755
--- a/plugin_source/deployment_scripts/compute_post_deployment.py
+++ b/plugin_source/deployment_scripts/compute_post_deployment.py
@@ -303,11 +303,13 @@ def patch_ceilometer():
         ceilometer-poll-cpu-util.patch
         ceilometer-rates-always-zero.patch
         ceilometer-support-network-bytes.patch
+        ceilometer-add-purge_inspection_cache.patch
     """
     patchfile_list = [
         'ceilometer-poll-cpu-util.patch',
         'ceilometer-rates-always-zero.patch',
         'ceilometer-support-network-bytes.patch',
+        'ceilometer-add-purge_inspection_cache.patch',
     ]
     for patch_file in patchfile_list:
         utils.patch(DIST_PACKAGES_DIR, patch_file, 1)
diff --git a/plugin_source/deployment_scripts/patchset/ceilometer-add-purge_inspection_cache.patch b/plugin_source/deployment_scripts/patchset/ceilometer-add-purge_inspection_cache.patch
new file mode 100644
index 0000000..e3f9c72
--- /dev/null
+++ b/plugin_source/deployment_scripts/patchset/ceilometer-add-purge_inspection_cache.patch
@@ -0,0 +1,15 @@
+diff --git a/ceilometer/compute/virt/xenapi/inspector.py b/ceilometer/compute/virt/xenapi/inspector.py
+index 6048e3a..d5676b1 100644
+--- a/ceilometer/compute/virt/xenapi/inspector.py
++++ b/ceilometer/compute/virt/xenapi/inspector.py
+@@ -238,3 +238,10 @@ class XenapiInspector(virt_inspector.Inspector):
+                     write_bytes_rate=write_rate,
+                     write_requests_rate=0)
+                 yield(disk, disk_rate_info)
++
++    def purge_inspection_cache(self):
++        # Empty function to fit MOS9.2 where get_samples will invoke
++        # self.inspector.purge_inspection_cache(); will envalue if
++        # support cache for XenAPI. But obviously we need the
++        # the code for caching available in upstream firstly.
++        pass