This message was deleted.

Hi Rahul, By default Druid should be configured with some amount of parallelization in it at every level. There are a lot of things to check ... here are a couple: Check properties like

numThreads

and

numConnections

and

numMergeBuffers

in Router, Broker and Historical Also look at your data. Data is stored in segments, and you want to have enough segments to allow parallel segment access across your Historical processing threads. If you think you have enough parallelism for the above, then we should probably look at your queries to see if they load the various services during execution.