We seem to have the same exact problem. We added 20 nodes to our existing cluster of 60 nodes which makes it 80 nodes. The new nodes are of the same configuration/capacity of the old ones. We do have heavy and concurrent jobs (Hive queries) that could easily flood the server 100%, this is to confirm that the cluster is not under-utilized. We did rebalance the data and verified that they are evenly balanced across the data nodes. We dont see any improvement at all after the upgrade, the job timings are same as before the upgrade. Do we need to update stats, metastore or any ther configuration for the new nodes to take effect in terms of performance ?? Any insights on this is much appreciated. ... View more