Github user HeartSaVioR commented on a diff in the pull request:
https://github.com/apache/storm/pull/2200#discussion_r126547602
--- Diff: docs/Metrics.md ---
@@ -125,3 +126,193 @@ The [builtin
metrics]({{page.git-blob-base}}/storm-client/src/jvm/org/apache/sto
[BuiltinMetricsUtil.java]({{page.git-blob-base}}/storm-client/src/jvm/org/apache/storm/daemon/metrics/BuiltinMetricsUtil.java)
sets up data structures for the built-in metrics, and facade methods that the
other framework components can use to update them. The metrics themselves are
calculated in the calling code -- see for example
[`ackSpoutMsg`]({{page.git-blob-base}}/storm-client/src/jvm/org/apache/storm/executor/Executor.java).
+#### Reporting Rate
+
+The rate at which built in metrics are reported is configurable through
the `topology.builtin.metrics.bucket.size.secs` metric. If you set this too
low it can overload the consumers
+and some metrics consumers expect metrics to show up at a fixed rate or
the numbers could be off, so please use caution when modifying this.
--- End diff --
If bucket.size.secs is configured to be too small, the update to metrics
consumers will happen more frequently and it could make some metrics consumers
being overloaded.
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