Histograms in jVisualVM-VisualGC plugin "not supported"

[Krystal Mok]

Hi Fino,

It's possible that you're using a different GC strategy in your Java7
environment from your Java6 one.
The VisualGC plugin for VisualVM doesn't support displaying histogram
information for ParallelGC; it works with other GCs in HotSpot, e.g.
DefNew/ParNew/G1. This hasn't changed from JDK6 to JDK7.

Please take a look at what GC you're using in the two environments you're
comparing.

- Kris

On Thu, Oct 4, 2012 at 3:50 AM, Michael Finocchiaro <
michael.finocchiaro at gmail.com> wrote:

> Perhaps the wrong forum for this question - if so please redirect me.
> I upgraded my Java to Java7 but with the same parameters for starting my
> Tomcat, I am no longer able to see the histograms in the VisualGC plugin to
> jVisualVM that were so useful for checking the tuning of SurvivorRatio back
> when I ran on Java6. Is this a known limitation on Java7 or did I miss a
> command-line parameter somewhere?
> Cheers,
> Fino
>
> Michael Finocchiaro
> michael.finocchiaro at gmail.com
> Mobile Telephone: +33 6 46 59 36 62
> MSN: le_fino at hotmail.com
> Twitter: le_fino
> Skype: michael.finocchiaro
> Blog: http://mfinocchiaro.wordpress.com
> LinkedIn: http://fr.linkedin.com/in/mfinocchiaro
>
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