We've been using elasticsearch in production for a month or so, and I'm
seeing strange CPU usage patterns, with really high CPU for periods,
followed by really low CPU for a long time. These patterns cause timeouts
so I'm trying to get to the bottom of them.
Firstly I'm running on an AWS small instance, so it could be just that the
instance is too small - but I dont think so, as CPU usage can be close to
zero for long periods.
I've run hotthreads a couple of times, and the output is available herehttps://gist.github.com/snmaynard/6f90c014e6748f528be3
and here https://gist.github.com/snmaynard/81e69a3a891522ce8ff1
I've also included copies of munin graphs, so you can see what I mean by
strange usage patterns. Theres no real increase in traffic that would
explain this. Is this "hitting a cliff" of performance something you would
expect to see on elasticsearch, or is something else happening here that
would explain it? I am running 0.20.2 on production.
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