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[Question #668399]: Lots of droppedCreates with relatively few metrics

To: graphite-dev@xxxxxxxxxxxxxxxxxxx
From: Gabe Mahoney <question668399@xxxxxxxxxxxxxxxxxxxxx>
Date: Sun, 29 Apr 2018 19:17:17 -0000
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New question #668399 on Graphite:
https://answers.launchpad.net/graphite/+question/668399

We are using the graphiteapp/graphite-statsd docker container on an amazon i3.large instance. We are trying to send about 10k metrics per minute from a handful of hosts. We noticed we were missing a lot of data points so I started investigating performance. I wasn't able to find documentation on carbon's stats but I am seeing about 5k "droppedCreates" per minute and "committedPoints" of about 150 per minute. Looking at the code it seems that we are hitting some performance issues, but its not clear to me what the bottleneck is.

carbon.agents.*.cache.size never goes above 100.
carbon.agents.*.cache.overflow stays at 0.
carbon.agents.*.creates are at about 50 per minute.

I'm seeing barely any CPU or mem usage by the agents or the aggregator.



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