I'm currently facing the same issue [as discussed in this thread from back in October 2016]. The upserts just don't accelerate to good rates, even if Hbase MasterUI is showing low requests amount. Sometimes Ambari shows me that request in general queue increase to much and HBase stops reeponding for 1 or 2 minutes.
Have you ever faced such behavior?
Hi @ivangancev, I moved your question to a new thread because originally you posted the above into the middle of a thread from back in October of 2016 that was already marked Resolved. Can you elaborate on your results obtained with the troubleshooting hints posted three years ago?