diff --git a/ironic/nova/scheduler/ironic_host_manager.py b/ironic/nova/scheduler/ironic_host_manager.py
index 1dab66993d..fde0c55596 100644
--- a/ironic/nova/scheduler/ironic_host_manager.py
+++ b/ironic/nova/scheduler/ironic_host_manager.py
@@ -36,15 +36,12 @@ class IronicNodeState(host_manager.HostState):
 
     def update_from_compute_node(self, compute):
         """Update information about a host from its compute_node info."""
-        all_ram_mb = compute['memory_mb']
+        self.free_ram_mb = compute['free_ram_mb']
+        self.total_usable_ram_mb = compute['memory_mb']
 
-        free_disk_mb = compute['free_disk_gb'] * 1024
-        free_ram_mb = compute['free_ram_mb']
-
-        self.free_ram_mb = free_ram_mb
-        self.total_usable_ram_mb = all_ram_mb
-        self.free_disk_mb = free_disk_mb
+        self.free_disk_mb = compute['free_disk_gb'] * 1024
         self.total_usable_disk_gb = compute['local_gb']
+
         self.vcpus_total = compute['vcpus']
         self.vcpus_used = compute['vcpus_used']