RFR: 8366850: Test com/sun/jdi/JdbStopInNotificationThreadTest.java failed

[Chris Plummer]

In order to make this test run faster, its heap size was reduced to 64m. This proved to be too small resulting in sometimes exceeding 10% usage before the notification can be setup. This meant that once the memory consumption loop started, it never stopped until OOME (it's suppose to stop when 10% usage has been achieved). I tried 128m and that also proved to be too small when using ZGC and -Xcomp. 256m seems to be enough. I tested 10x times on all our debug platforms with ZGC, ZGC + -Xcomp, and G1 + -Xcomp.

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Commit messages:
 - Increase heap size to 256m to avoid OOME

Changes: https://git.openjdk.org/jdk/pull/27126/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27126&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8366850
  Stats: 5 lines in 2 files changed: 4 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/27126.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27126/head:pull/27126

PR: https://git.openjdk.org/jdk/pull/27126