Elasticsearch search latency with young GC

Elastic Stack Elasticsearch
1

version is 6.5.1

When there is a frequently young GC occurred, the search latency raised to 200 ~ 500 ms, however the normal latency is within 100ms. all api is simple search api.

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Screen Shot 2019-04-01 at 18.20.54.png1316×616 51 KB

18

there is no even full GC, and the log have no any relatives info about gc, just print:

global ordinals took ...
global ordinals took ...
2

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