Comment 3 for bug 1394600

Each message with metering data for notification agent contains some metric types: memory, instance, disk.root.size, vcpus and etc (http://docs.openstack.org/developer/ceilometer/measurements.html#compute-nova). That means that from one message will be written more than one sample (one sample per metric type). Sample will contain info only about one notification type (memory or instance, or disk.root.size or ..). If we have 12 messages, so we will have 12 sample for memory, 12 sample for instance and etc. There is no any duplication on ceilometer side.

Need in research why nova sends so much message about one instance.

Ilya Tyaptin will take a look on this, but we also need in research from nova side.