Github user jiangxb1987 commented on a diff in the pull request:
https://github.com/apache/spark/pull/18711#discussion_r128945012
--- Diff: docs/configuration.md ---
@@ -1106,7 +1106,7 @@ Apart from these, the following properties are also
available, and may be useful
parameter allows an application to run multiple executors on the
same worker, provided that there are enough cores on that
worker. Otherwise, only one executor per application will run on
- each worker.
+ each worker usually.
--- End diff --
```
In standalone and Mesos coarse-grained modes, setting this
parameter allows an application to launch multiple executors on the
same worker in one schedule iteration, provided that there are enough
cores on that worker. Otherwise, only one executor per application
will be scheduled on each worker during one schedule iteration.
```
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