diff --git a/server/src/com/cloud/server/ManagementServerImpl.java b/server/src/com/cloud/server/ManagementServerImpl.java
index b0982aa956a..afc1562f5cb 100755
--- a/server/src/com/cloud/server/ManagementServerImpl.java
+++ b/server/src/com/cloud/server/ManagementServerImpl.java
@@ -3275,25 +3275,10 @@ public class ManagementServerImpl implements ManagementServer {
     
     @Override
     public long getMemoryUsagebyHost(Long hostId) {
-        long mem = 0;
-        List<VMInstanceVO> vms = _vmInstanceDao.listUpByHostIdTypes(hostId, VirtualMachine.Type.DomainRouter);
-        mem += vms.size() * _routerRamSize * 1024L * 1024L;
- 
-        vms = _vmInstanceDao.listUpByHostIdTypes(hostId, VirtualMachine.Type.SecondaryStorageVm);
-        mem += vms.size() * _ssRamSize * 1024L * 1024L;
+    	
+        CapacityVO capacity = _capacityDao.findByHostIdType(hostId, CapacityVO.CAPACITY_TYPE_MEMORY);
+        return capacity == null ? 0 : capacity.getReservedCapacity() + capacity.getUsedCapacity(); 
         
-        vms = _vmInstanceDao.listUpByHostIdTypes(hostId, VirtualMachine.Type.ConsoleProxy);
-        mem += vms.size() * _proxyRamSize * 1024L * 1024L;
-        
-        
-        List<UserVmVO> instances = _userVmDao.listUpByHostId(hostId);
-        for (UserVmVO vm : instances) {
-            ServiceOffering so = findServiceOfferingById(vm.getServiceOfferingId());
-            if (so != null) {
-            	mem += so.getRamSize() * 1024L * 1024L;
-            }
-        }
-        return mem;
     }
 
     @Override