Added two additional data nodes to a cluster with an existing three data nodes, three masters, and two client nodes. Also upgraded the cluster from 5.2.2 to 5.3.2. Indexing rate for the cluster before adding the two new nodes floated around 5k eps taking input from a single logstash box. Indexing rate after upgrade and additions is now around 1k eps.
Also noticed immediately after adding the two new nodes, that while the shards balanced out across the data nodes, no new indexing was taking place. That seems wrong, like maybe I missed releasing something in the system to ingest new data correctly.
What commands can I use to verify what's going on and causing this hit?