[jdk21u-dev] RFR: 8314573: G1: Heap resizing at Remark does not take existing eden regions into account

[Severin Gehwolf]

On Thu, 4 Apr 2024 19:52:07 GMT, Goetz Lindenmaier <goetz at openjdk.org> wrote:

>> Clean backport of fix of G1 Heap resizing heuristics at remark
>> 
>> Additional testing:
>>  - [x] Linux aarch64 server release/fastdebug, test/hotspot/jtreg/gc with +UseG1GC
>
> Hi @mmyxym, I don't think the risk is that low.
> After all, someone opened [JDK-8315866](https://bugs.openjdk.org/browse/JDK-8315866) because his GC behaved differently. Something like this can obstruct a producitve system.

I agree with @GoeLin. @mmyxym Please explain in more detail why you think this backport is needed for JDK 21u. The explanation given isn't very convincing. We'd be trading (potentially) more cpu cycles for (potentially) less use of memory.

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/429#issuecomment-2040065104