diff --git a/osm_mon/collector/vnf_collectors/openstack.py b/osm_mon/collector/vnf_collectors/openstack.py
index 60b387c..1bb0fc8 100644
--- a/osm_mon/collector/vnf_collectors/openstack.py
+++ b/osm_mon/collector/vnf_collectors/openstack.py
@@ -19,16 +19,17 @@
 # For those usages not covered by the Apache License, Version 2.0 please
 # contact: bdiaz@whitestack.com or glavado@whitestack.com
 ##
-import logging
 from enum import Enum
+import logging
+import time
 from typing import List
 
-import gnocchiclient.exceptions
 from ceilometerclient import client as ceilometer_client
 from ceilometerclient.exc import HTTPException
+import gnocchiclient.exceptions
 from gnocchiclient.v1 import client as gnocchi_client
-from keystoneclient.v3 import client as keystone_client
 from keystoneauth1.exceptions.catalog import EndpointNotFound
+from keystoneclient.v3 import client as keystone_client
 from neutronclient.v2_0 import client as neutron_client
 
 from osm_mon.collector.metric import Metric
@@ -38,6 +39,7 @@
 from osm_mon.core.common_db import CommonDbClient
 from osm_mon.core.config import Config
 
+
 log = logging.getLogger(__name__)
 
 METRIC_MAPPINGS = {
@@ -50,7 +52,15 @@
     "packets_out_dropped": "network.incoming.packets.drop",
     "packets_received": "network.incoming.packets.rate",
     "packets_sent": "network.outgoing.packets.rate",
-    "cpu_utilization": "cpu_util",
+    "cpu_utilization": "cpu",
+}
+
+METRIC_MULTIPLIERS = {
+    "cpu": 0.0000001
+}
+
+METRIC_AGGREGATORS = {
+    "cpu": "rate:mean"
 }
 
 INTERFACE_METRICS = ['packets_in_dropped', 'packets_out_dropped', 'packets_received', 'packets_sent']
@@ -212,11 +222,22 @@
     def _collect_instance_metric(self, openstack_metric_name, resource_id):
         value = None
         try:
+            aggregation = METRIC_AGGREGATORS.get(openstack_metric_name)
+
             measures = self.client.metric.get_measures(openstack_metric_name,
-                                                       resource_id=resource_id,
-                                                       limit=1)
+                                                       aggregation=aggregation,
+                                                       start=time.time() - 1200,
+                                                       resource_id=resource_id)
+            # measures[-1][0] is the time of the reporting interval
+            # measures[-1][1] is the durcation of the reporting interval
+            # measures[-1][2] is the value of the metric
             if measures:
                 value = measures[-1][2]
+                if aggregation:
+                    # If this is an aggregate, we need to divide the total over the reported time period.
+                    value = value / measures[-1][1]
+                if openstack_metric_name in METRIC_MULTIPLIERS:
+                    value = value * METRIC_MULTIPLIERS[openstack_metric_name]
         except gnocchiclient.exceptions.NotFound as e:
             log.debug("No metric %s found for instance %s: %s", openstack_metric_name, resource_id,
                       e)
diff --git a/osm_mon/tests/unit/collector/vnf_collectors/test_openstack.py b/osm_mon/tests/unit/collector/vnf_collectors/test_openstack.py
index 5493ae7..1f2d06a 100644
--- a/osm_mon/tests/unit/collector/vnf_collectors/test_openstack.py
+++ b/osm_mon/tests/unit/collector/vnf_collectors/test_openstack.py
@@ -23,6 +23,8 @@
 import datetime
 from unittest import TestCase, mock
 
+import gnocchiclient
+
 from osm_mon.collector.vnf_collectors.openstack import GnocchiBackend
 from osm_mon.core.config import Config
 
@@ -37,7 +39,7 @@
 
     @mock.patch.object(GnocchiBackend, '_build_neutron_client')
     @mock.patch.object(GnocchiBackend, '_build_gnocchi_client')
-    def test_collect_gnocchi_instance(self, build_gnocchi_client, build_neutron_client):
+    def test_collect_gnocchi_rate_instance(self, build_gnocchi_client, _):
         mock_gnocchi_client = mock.Mock()
         mock_gnocchi_client.metric.get_measures.return_value = [(datetime.datetime(2019, 4, 12, 15, 43,
                                                                                    tzinfo=datetime.timezone(
@@ -46,14 +48,52 @@
                                                                 (datetime.datetime(2019, 4, 12, 15, 44,
                                                                                    tzinfo=datetime.timezone(
                                                                                        datetime.timedelta(0),
-                                                                                       '+00:00')), 60.0, 0.0333070363)]
+                                                                                       '+00:00')), 60.0, 600000000)]
         build_gnocchi_client.return_value = mock_gnocchi_client
 
         backend = GnocchiBackend({'_id': 'test_uuid'})
-        value = backend._collect_instance_metric('cpu_utilization', 'test_resource_id')
-        self.assertEqual(value, 0.0333070363)
-        mock_gnocchi_client.metric.get_measures.assert_called_once_with('cpu_utilization',
-                                                                        limit=1,
+        value = backend._collect_instance_metric('cpu', 'test_resource_id')
+        self.assertEqual(value, 1.0)
+        mock_gnocchi_client.metric.get_measures.assert_called_once_with('cpu',
+                                                                        aggregation="rate:mean",
+                                                                        start=mock.ANY,
+                                                                        resource_id='test_resource_id')
+
+    @mock.patch.object(GnocchiBackend, '_build_neutron_client')
+    @mock.patch.object(GnocchiBackend, '_build_gnocchi_client')
+    def test_collect_gnocchi_non_rate_instance(self, build_gnocchi_client, _):
+        mock_gnocchi_client = mock.Mock()
+        mock_gnocchi_client.metric.get_measures.return_value = [(datetime.datetime(2019, 4, 12, 15, 43,
+                                                                                   tzinfo=datetime.timezone(
+                                                                                       datetime.timedelta(0),
+                                                                                       '+00:00')), 60.0, 0.0345442539),
+                                                                (datetime.datetime(2019, 4, 12, 15, 44,
+                                                                                   tzinfo=datetime.timezone(
+                                                                                       datetime.timedelta(0),
+                                                                                       '+00:00')), 60.0, 128)]
+        build_gnocchi_client.return_value = mock_gnocchi_client
+
+        backend = GnocchiBackend({'_id': 'test_uuid'})
+        value = backend._collect_instance_metric('memory.usage', 'test_resource_id')
+        self.assertEqual(value, 128)
+        mock_gnocchi_client.metric.get_measures.assert_called_once_with('memory.usage',
+                                                                        aggregation=None,
+                                                                        start=mock.ANY,
+                                                                        resource_id='test_resource_id')
+
+    @mock.patch.object(GnocchiBackend, '_build_neutron_client')
+    @mock.patch.object(GnocchiBackend, '_build_gnocchi_client')
+    def test_collect_gnocchi_no_metric(self, build_gnocchi_client, _):
+        mock_gnocchi_client = mock.Mock()
+        mock_gnocchi_client.metric.get_measures.side_effect = gnocchiclient.exceptions.NotFound()
+        build_gnocchi_client.return_value = mock_gnocchi_client
+
+        backend = GnocchiBackend({'_id': 'test_uuid'})
+        value = backend._collect_instance_metric('memory.usage', 'test_resource_id')
+        self.assertIsNone(value)
+        mock_gnocchi_client.metric.get_measures.assert_called_once_with('memory.usage',
+                                                                        aggregation=None,
+                                                                        start=mock.ANY,
                                                                         resource_id='test_resource_id')
 
     @mock.patch.object(GnocchiBackend, '_build_neutron_client')