RFR (XS) 8241926: Shenandoah: only print heap changes for operations that directly affect it

[Roman Kennke]

Hi Aleksey,

That makes sense, and the patch looks good.

Thank you!
Roman


> RFE:
>   https://bugs.openjdk.java.net/browse/JDK-8241926
> 
> Our current log prints the heap changes for every operation, including those that do not change the
> heap directly. It clutters the GC log unnecessarily. We might consider only printing heap changes
> for the ops that do affect either used() or capacity().
> 
> Example log is in the issue itself.
> 
> Webrev:
>   https://cr.openjdk.java.net/~shade/8241926/webrev.01/
> 
> Testing: hotspot_gc_shenandoah, eyeballing gc logs
>