Should we specify a limiting max heap size on test jobs to control things like max dump sizes ?

Issues have been seen with openj9 AIX testcases that produce dumps that are 30+Gb, because the default heapsize is 25% available RAM, and on some AIX boxes there can be a huge amount of available RAM. But we may only have a 30Gb disk partition.

Should we specify a -Xmx, at least for openj9?

Start by locating the OpenJ9 AIX test-job configuration and reviewing how JVM options are supplied; the issue names no file or test entry point. Determine an appropriate heap limit for the affected jobs, then verify that dump sizes remain within the available disk constraint without changing other runtimes.

Written by the indexing model from the issue text.