Github user rmetzger commented on a diff in the pull request:
https://github.com/apache/flink/pull/3262#discussion_r99351570
--- Diff: docs/dev/parallel.md ---
@@ -166,10 +177,19 @@ try {
</div>
-## System Level
+### System Level
A system-wide default parallelism for all execution environments can be
defined by setting the
`parallelism.default` property in `./conf/flink-conf.yaml`. See the
[Configuration]({{ site.baseurl }}/setup/config.html) documentation for
details.
+## Setting the Maximum Parallelism
--- End diff --
Afaik, there's a performance impact for setting a high max parallelism. We
should warn our users and give some rules of thumb for setting the max
parallelism
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