all nova computes regularly poll neutron server to get network info of the instances running on the compute node. Default is 10 seconds. With thousands of VMs it is recommended to increase interval at 600seconds
diff --git a/metadata/service/compute/kvm.yml b/metadata/service/compute/kvm.yml
index 80ec6f8..345624c 100644
--- a/metadata/service/compute/kvm.yml
+++ b/metadata/service/compute/kvm.yml
@@ -8,6 +8,7 @@
enabled: true
version: ${_param:nova_version}
virtualization: kvm
+ heal_instance_info_cache_interval: 60
bind:
vnc_address: ${linux:network:host:local:address}
vnc_port: 6080