Degenerated GC pauses for 5-10 seconds

[Aleksey Shipilev]

On 1/18/19 6:02 PM, Alexander Yakushev wrote:
>     Look around ShenandoahAllocationTrace and ShenandoahAllocationTraceThreshold. It would print
>     warnings to GC log if stalls are detected. You can also employ a nuclear option: set
>     ShenandoahPacingDelay=${HUGE_VAL}, for example 30000. Then you should never Degen/Full GC, and
>     instead block the allocating thread waiting for GC to complete.
> 
> 
> I couldn't find any info on ShenandoahAllocationTraceThreshold. What should it be set to?

My bad, wrong option name, this one:

  diagnostic(intx, ShenandoahAllocationStallThreshold, 10000,               \
          "When allocation tracing is enabled, the allocation stalls "      \
          "larger than this threshold would be reported as warnings. "      \
          "Time is in microseconds.")                                       \

-Aleksey