srowen commented on a change in pull request #23615: [MINOR][DOC] Documentation
on JVM options for SBT
URL: https://github.com/apache/spark/pull/23615#discussion_r249809887
##########
File path: docs/building-spark.md
##########
@@ -138,6 +138,13 @@ To avoid the overhead of launching sbt each time you need
to re-compile, you can
in interactive mode by running `build/sbt`, and then run all build commands at
the command
prompt.
+### Setting up SBT's Memory Usage
+Configure the JVM options for SBT in `.jvmopts`, for example:
+
+ $ cat .jvmopts
[21:18:11]
+ -Xms512M
Review comment:
I doubt we need to suggest `-Xms`; for simplicity, remove it? Also let's
make it consistent with the Maven opts above: `-Xmx2g`?
I'm not sure what [21:18:11] is; we don't need to show `cat`. But this does
need to say that the file should live in the project root and show its one line
of content.
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