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Subject [Bug 61555] New: Metaspace should be restricted as default
Date Thu, 21 Sep 2017 11:09:12 GMT

            Bug ID: 61555
           Summary: Metaspace should be restricted as default
           Product: JMeter
           Version: 3.2
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Main
  Target Milestone: ---

For Jmeter 3.2, the metaspace maximum size is not set by default in the Jmeter
scripts.  This can lead to situations where tests will fail or start to slow
after a large number of hours into the test, due to using up all available
memory on the box and invoking paging.

It is preferable that Jmeter specify a default value for max metaspace to
prevent this happening.  If my tests are going to fail it is better that they
will fail early, rather than later and with a OOM metaspace, rather than
showing degraded performance which may be assumed to be related to the app
under test.

I would leave it to the team to decide what the default max should be. 
Obviously this might break some user's current tests so it will need to be
highlighted in the release notes.  We currently restrict our Jmeters to 256mb
on our 4GB boxes.

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