RFR: 8369949: Increase Xmx of TestWaste.java so the EdgeQueue is larger, to fix crash

[Kerem Kat]

On Mon, 10 Nov 2025 12:28:18 GMT, Kerem Kat <krk at openjdk.org> wrote:

> SIGSEGV is caused by a stack overflow in the VM Thread that is traversing the object graph via `BFSClosure::process`. When the `EdgeQueue` is full, `BFSClosure` falls back to DFS.
> 
> We could increase `Xmx` of the test, or work on finding a better heap percentage for `edge_queue_memory_reservation`.
> 
> Here `Xmx` is set to `2g`. More details in the issue.

In my tests on linux x86_64, the test crashes with `DFSClosure::max_dfs_depth = 3255` and passes with `3254`.

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PR Comment: https://git.openjdk.org/jdk/pull/28215#issuecomment-3511838170