RFR: bug: Timely Reducing Unused Committed Memory

Thomas Schatzl thomas.schatzl at oracle.com
Tue Sep 4 15:20:31 UTC 2018


Hi Rodrigo,

  I extracted your webrev to

http://cr.openjdk.java.net/~tschatzl/jelastic/pgc-webrev.1/

for easier review.

Thanks,
  Thomas

On Tue, 2018-09-04 at 15:04 +0000, Rodrigo Bruno wrote:
> Hi Thomas,
> 
> > Did you ever notice an improvement in heap usage after the first
> > such
> > attempt?
> > There should be none except for memory held by j.l.ref.References.
> > 
> > What I want to get at, as a later improvement, we could think of
> > just
> > skipping those then (as except as mentioned for the
> > j.l.ref.References
> > issue there would be "no" difference).
> > 
> 
> I didn't devise any experiments to measure memory usage. However, we
> can obviously do that.
> 
> The new version of the patch regarding 
> 
> http://openjdk.java.net/jeps/8204089
> 
> can be found at
> 
> http://www.gsd.inesc-id.pt/~rbruno/webrev.zip
> 
> This version already includes idle compaction (Full GC is optional)
> and your previous comments as well.
> 
> Let me know what you think. 
> 
> cheers,
> rodrigo
>  



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