OOME When large segments merge

I've noticed periodically that data nodes in my cluster will run out of
heap space when large segments start merging. I attached a screenshot of
what marvel looked like leading up to the OOME on one of my data nodes.

My question is, generally speaking, what knobs should I be turning to
throttle resource consumption when large segment files are being merged?

I'm running ES version 1.4.1.

Thanks,
Mark

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Do you have many fields with norms enabled?

Mike McCandless

http://www.elastic.co

On Thu, Mar 12, 2015 at 1:20 PM, Mark Greene mark@evertrue.com wrote:

I've noticed periodically that data nodes in my cluster will run out of
heap space when large segments start merging. I attached a screenshot of
what marvel looked like leading up to the OOME on one of my data nodes.

My question is, generally speaking, what knobs should I be turning to
throttle resource consumption when large segment files are being merged?

I'm running ES version 1.4.1.

Thanks,
Mark

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