Is your replication_factor 2? Or is it 3? What version are you using?
The most likely answer is some individual partition that’s either being written/read more than others, or is somehow impacting the cluster (wide rows are a natural candidate). You don’t mention your version, but most modern versions of Cassandra ship with ‘nodetool toppartitions’, which will help you identify frequently written/read partitions – perhaps you can use that to identify a hotspot due to some external behavior (some partition being read thousands of times, over and over could certainly drive up load). - Jeff From: Pranay akula <pranay.akula2...@gmail.com> Reply-To: "user@cassandra.apache.org" <user@cassandra.apache.org> Date: Monday, September 19, 2016 at 7:53 AM To: "user@cassandra.apache.org" <user@cassandra.apache.org> Subject: High load on few nodes in a DC. when our cluster was under load i am seeing 1 or 2 nodes are on more load consistently when compared to others in dc i am not seeing any GC pauses or wide partitions is this can be those nodes are continuously serving as coordinators ?? how can i find what is the reason for high load on those two nodes ?? We are using Vnode. Thanks Pranay.
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