gengliangwang commented on code in PR #39202:
URL: https://github.com/apache/spark/pull/39202#discussion_r1057931838
##########
docs/monitoring.md:
##########
@@ -341,6 +341,16 @@ Security options for the Spark History Server are covered
more detail in the
</td>
<td>2.3.0</td>
</tr>
+ <tr>
+ <td>spark.history.store.serializer</td>
+ <td>JSON</td>
+ <td>
+ Serializer for writing/reading in-memory UI objects to/from disk-based
KV Store; JSON or PROTOBUF.
+ JSON serializer is the only choice before Spark 3.4.0, thus it is the
default value.
+ PROTOBUF serializer is fast and compact, and it is the default
serializer for disk-based KV store of live UI.
Review Comment:
ok, updated
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