The division by zero error that caused the crash in ObjectSynchronizer::is_async_deflation_needed() was fixed in JDK-8332506. However it was only the urgent problem (division by zero) that was fixed. The "real" problem, which is the math behind the calculation of the ceiling value is still weird, i.e. not fixed. This RFE should track suggestions as to how the calculation should be done in a proper way.