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From Frank Luo <>
Subject RE: How to obtain concurrent query executions
Date Wed, 28 Sep 2016 15:55:37 GMT
If you are using Hadoop 2.7 or newer, you can use and mapreduce.job.running.reduce.limit
to restrict map and reduce tasks at each job level.

Another way is to use Scheduler to limit queue size.

From: Jose Rozanec []
Sent: Tuesday, September 27, 2016 5:54 PM
Subject: How to obtain concurrent query executions


We have a Hive cluster. We notice that some queries consume all resources, which is not desirable
to us, since we want to grant some degree of parallelism to incoming ones: any incoming query
should be able to do at least some progress, not just wait the big one finish.

Is there way to do so? We use Hive 2.1.0 with Tez engine.

Thank you in advance,


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