Query Metrics on Broker (io.druid.server.metrics.QueryCountStatsMonitor)

Apache Druid Q&A Google Groups
#1

Hi,
I’ve activated the Query Metrics on Brokers, Historical and Indexing services into common.runtime.properties setting io.druid.server.metrics.QueryCountStatsMonitor in the list of monitors

druid.monitoring.emissionPeriod = PT1m

druid.monitoring.monitors=[“com.metamx.metrics.SysMonitor”,“com.metamx.metrics.JvmMonitor”,“io.druid.client.cache.CacheMonitor”,“io.druid.server.metrics.QueryCountStatsMonitor”]

druid.emitter=composing

druid.emitter.composing.emitters=[“logging”,“http”]

``

However, on all Brokers values are always 0 for success, failed and interrupted (obviously query are incoming) while the Historical nodes have values.

Can you please help me on investigating why it’s happening

Thanks,

Maurizio

#2

Hi,
does anyone is using QueryCountStatsMonitor? Is it working on Broker service?

Thanks
Maurizio

#3

Hi Maurizio,

Currently those metrics are always reported as zero, it’s a bug that will be fixed in Druid 0.11.0. Until then, you could count the number of “query/time” metrics – it should be equivalent to the number of queries made. The “success” dimension will let you differentiate successful from failed queries.

#4

Thanks Gian for the feedback!
I'll do as suggested.

Maurizio