jaceklaskowski/jvm-tools.md

Created September 4, 2015 09:55

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I should have known these tools earlier - a story about jps, jstat and jmap

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jvm-tools.md

From http://stackoverflow.com/a/32393044/1305344:

object size extends App {
  (1 to 1000000).map(i => ("foo"+i, ()))
  val input = readLine("prompt> ")
}

Run it with sbt 'runMain size' and then use jps (to know the pids), jstat -gc pid (to query for gc) and jmap (similar to jstat) to analise resource allocation.

http://docs.oracle.com/javase/1.5.0/docs/tooldocs/share/jmap.html
http://docs.oracle.com/javase/7/docs/technotes/tools/share/jstat.html

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