How to pin/avoid gc for an oop?

[Volker Simonis]

Not quite sure what you want to achieve, but with G1 you could
allocate a "humongous" object [1,2] which is just as big as a G1
region. It will be allocated into the old generation and not moved
around by GC.

Regards,
Volker

[1] http://www.oracle.com/technetwork/articles/java/g1gc-1984535.html
[2] https://plumbr.eu/handbook/gc-tuning-in-practice/other-examples/humongous-allocations

On Thu, Mar 9, 2017 at 6:25 PM, Christian Hagedorn
<ch-hagedorn at hispeed.ch> wrote:
> Hi,
>
>
>
> I want to implement an undo functionality and thus need to access an oop
> even when it is out of scope in the Java code. How can I pin such an oop to
> avoid garbage collection of its used memory?
>
>
>
> Best regards,
>
> Christian
>