PerfData counter: sun.gc.policy.generations in JDK 8

Srinivas Ramakrishna ysr1729 at gmail.com
Thu May 14 16:12:54 UTC 2015


https://bugs.openjdk.java.net/browse/JDK-8080345



On Wed, May 13, 2015 at 1:08 PM, Srinivas Ramakrishna <ysr1729 at gmail.com>
wrote:

>
> With perm gen going away (and being replaced by metaspace) in JDK 8, it
> makes sense that the counter
> sun.gc.policy.generations should be "2", rather than "3". However, in JDK
> 8 that counter still says 3.
> As I understand, the intention was that this counter would allow you to
> (for example) know the range of
> the sun.gc.generation.$num.* counters describing each of $num <
> sun.gc.policy.generations in the heap.
> Recall that the erstwhile perm gen in JDK 7 used to be synonymous with
> sun.gc.generation.2, but the
> JDK 8 avatars are now sun.gc.metaspace and sun.gc.compressedclassspace.
>
> The fix is simple, and I can submit a patch. Is there an existing bug for
> this?
>
> thanks!
> -- ramki
>
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