[8u, 11u] RFR: Shenandoah: enable low-frequency STW class unloading

[Aleksey Shipilev]

On 7/20/20 6:25 PM, Roman Kennke wrote:
> Ok I guess this should work for the start.
> 
> It varies *a lot* depending on the workload though: some workloads
> might never need it, some might need it at higher frequency. It would
> be good to have a better trigger like some threshold(s) on number of
> loaded classes or stringtable occupancy. Anyway, let's go with your
> patches for the start.

Right. Pushed.

-- 
Thanks,
-Aleksey