Upgraded riak 1.4.9 is pegging the CPU

Alain Rodriguez alain at uber.com
Thu Jun 5 11:20:21 EDT 2014

Hi all,

I upgraded 1 of 9 riak nodes in a cluster last night from 1.4.0 to 1.4.9.
The rest are running 1.4.0.

Ever since I am seeing the upgraded node, riak01 consuming a significantly
larger percent of CPU and the PUT times on it have gotten worse. htop
indicicates one particular process pegging the CPU, and many many more
processes running than I was used to seeing before.

Has anyone seen this before? Do I have to retune something for 1.4.9?

I am attaching htop, cpu and put graphs, and my app.config used across all


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