monitoring-demo | Docker - ELK - Tick Stack - Grafana - Kafka | Pub Sub library
kandi X-RAY | monitoring-demo Summary
kandi X-RAY | monitoring-demo Summary
This project is about giving you a step by step introduction on how to leverage docker and the open-source ecosystem to do metrics/logs/alerting. Note: This project is only intended to present ideas. Note: if you are using docker for mac please assign at least 5go of memory.
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QUESTION
Small question regarding how to build Grafana dashboards which separates "boundedElastic" vs "parallel" please.
Currently with a Spring Webflux app, I get out of the box very useful metrics for Reactor Core.
...ANSWER
Answered 2021-Jul-07 at 19:14In the demo project, the metrics are stored in Prometheus and are queried using PromQL. Each metric can have several labels and each label can have several values. The metrics can be selected by labels and values, e.g. my_metric{first_label="first_value", second_label="another_value"}
selects my_metric
where both labels are matching corresponding values.
So in your example the metric executor_pool_size_threads
has the label reactor_scheduler_id
. However, the values contain more information beyond scheduler name. On my machine (because of default pool size) the values are: parallel(8,"parallel")
and boundedElastic("boundedElastic",maxThreads=80,maxTaskQueuedPerThread=100000,ttl=60s)
. So regex-match is useful here for matching the values with =~
operator.
PromQL query only for parallel
:
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