TestMetaspaceAllocationMT2.java#ndebug-default fails with "RuntimeException: Committed seems high: NNNN expected at most MMMM"

The following test failed in the JDK18 CI:

runtime/Metaspace/elastic/TestMetaspaceAllocationMT2.java#ndebug-default

Here's a snippet from the log file:

----------System.err:(13/913)----------
java.lang.RuntimeException: Committed seems high: 12541952 expected at most 10217430
at MetaspaceTestContext.checkStatistics(MetaspaceTestContext.java:223)
at MetaspaceTestManyArenasManyThreads.runTest(MetaspaceTestManyArenasManyThreads.java:89)
at TestMetaspaceAllocationMT2.main(TestMetaspaceAllocationMT2.java:193)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:577)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:833)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Committed seems high: 12541952 expected at most 10217430
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Committed seems high: 12541952 expected at most 10217430
----------rerun:(38/7197)*----------

The test task's JVM args are: <none>