backport JEP 344-Abortable Mixed Collections for G1 to jdk11u

Thomas Schatzl thomas.schatzl at
Thu Mar 28 19:31:42 UTC 2019

Hi Lin,

On Wed, 2019-03-27 at 10:51 +0000, 臧琳 wrote:
> Dear All, 
>      I have tried the JEP344 for a while and find it could help us to
> avoid the long Mixed GCs when the heap is large.  

It is great to hear that it helps you in your case.

I assume you tried some tuning with the options presented in the
documentation at

Note that in some cases this still might not result in as nice behavior
as with abortable mixed gc.

>      So I am planning to port it back to jdk11u as G1 is the default
> GC, do you think it is reasonable?

  I believe it is okay if it is useful, but it is best to ask the
maintainers of jdk11u directly in on the jdk-updates-dev mailing list.
As this would be a bit bigger change/backport, so there might be some
further concerns by the jdk11u maintainers.

Code review seems to have to occur on the jdk-updates-dev mailing list
( - maybe
cc hotspot-gc-dev though.


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