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Posted to commits@druid.apache.org by GitBox <gi...@apache.org> on 2019/12/13 00:52:36 UTC
[GitHub] [incubator-druid] himanshug commented on issue #9017: help
understanding some basics to overcome query lag
himanshug commented on issue #9017: help understanding some basics to overcome query lag
URL: https://github.com/apache/incubator-druid/issues/9017#issuecomment-565253741
once you have metrics , pay special attention to following metrics...
broker:
query/time, query/node/time , query/node/ttfb
historicals:
query/time, query/segment/time, query/wait/time, segment/scan/pending,
those metrics should help identify the split for 13s .
watch for GC and Page swapping activity on all nodes that were in processing path of that query.
(I am assuming you don't have realtime indexing setup)
hth
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