Github user steveloughran commented on a diff in the pull request:
https://github.com/apache/spark/pull/6935#discussion_r48367142
--- Diff: docs/monitoring.md ---
@@ -69,36 +83,53 @@ follows:
</tr>
</table>
+### Spark configuration options
+
<table class="table">
<tr><th>Property Name</th><th>Default</th><th>Meaning</th></tr>
<tr>
<td>spark.history.provider</td>
- <td>org.apache.spark.deploy.history.FsHistoryProvider</td>
+ <td><code>org.apache.spark.deploy.history.FsHistoryProvider</code></td>
<td>Name of the class implementing the application history backend.
Currently there is only
one implementation, provided by Spark, which looks for application
logs stored in the
file system.</td>
</tr>
<tr>
+ <td>spark.history.retainedApplications</td>
+ <td>50</td>
--- End diff --
I'm not entirely sure why that ended up there. You could make the case for
separating fs options from other ones, but really the most important is that
log dir value, as without it: nothing else works
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