RFR: 8348278: Trim InitialRAMPercentage to improve startup in default modes [v4]

[Aleksey Shipilev]

On Mon, 15 Sep 2025 12:40:39 GMT, Stefan Johansson <sjohanss at openjdk.org> wrote:

>> Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains two commits:
>> 
>>  - Also man page
>>  - Fix
>
> I started some runs in our internal perf-testing environment to see what kind of results we would get with a change like this. 
> 
> I think the reasoning sounds good for large machines, and for smaller containers some quick testing indicates that we never go below 8M for `Min/InitialHeapSize` which I also think is good. 2M sounds very small :)

Thanks @kstefanj! How is it going with testing?

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PR Comment: https://git.openjdk.org/jdk/pull/23262#issuecomment-3301364521