I've configured all of my cloudera managed hosts to have vm.swappiness=1. You can't turn off swap completely and have a stable machine, so that's as close as I'm going to get.
I still get constant alerts when a host pages 1500bytes to disk. The cloudera manager console goes yellow and my clients freak out.
What is up with the swap alert defaults alert level being set to such an asinine level?
We have the same problem on both test and production cluster.
It was set up a few weeks ago, and nothing really demanding is running ( we have 100+GBs of free RAM on each node )
However, Hue, Sentry and Spark is showing warning for swappiness.
I also see nothing relevant in the logs.
Swappiness is 1 on each node.
Please, if you have any lead to go on let us know. Thank you :)