JEP 144: Reduce GC Latency for Large Heaps

John Coomes John.Coomes at oracle.com
Wed Feb 29 18:20:30 PST 2012


Tony Printezis (tony.printezis at oracle.com) wrote:
> Todd,
> 
> The fix should be on all the open repos by now and should also be 
> included in the upcoming 7u4 release (i.e., it's in hotspot 23).

FWIW, it's in the jdk8 snapshot build that's now on java.net:

	http://jdk8.java.net/download.html

-John

> On 02/29/2012 03:04 PM, Todd Lipcon wrote:
> > On Wed, Feb 29, 2012 at 9:23 AM, Tony Printezis
> > <tony.printezis at oracle.com>  wrote:
> >> Todd,
> >>
> >> I recently pushed a change that causes G1 to be more aggressive when
> >> choosing which old regions to collect during mixed GCs. I think it still
> >> needs a bit more fine-tuning but it's much better compared to what we had
> >> before which I admit it was sub-optimal and fiddly. It should address both
> >> issues you mentioned below.
> >>
> > Thanks for the update, Tony. Are these fixes in the latest JDK7
> > releases? Or do I need to build from hg? (is there a snapshot/nightly
> > build from hg I could try if the latter to avoid the pain of building
> > myself?)
> >
> > -Todd


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