Monitoring finalization activity

[Taras Tielkes]

Hi,

We've enabled -XX:+PrintReferenceGC, which at least gives totals per
reference type cleared per GC.
It seems that the tracing JVM options to see which classes are actually put
on the finalizer queue are not available in product JVM builds.

Is it possible to get the same data somehow through the JMX GC APIs
(com.sun.management.GcInfo etc)?

Thanks,
-tt


On Sun, Jan 13, 2013 at 11:17 PM, Andreas Loew <Andreas.Loew at oracle.com>wrote:

> Hi Taras,
>
> you should be able to use BTrace (i.e. dynamic bytecode instrumentation)
> and register a probe on calling into the finalize() methods of the classes
> you want to monitor (the probe can then do the counting):
>
> http://kenai.com/projects/**btrace/pages/Home<http://kenai.com/projects/btrace/pages/Home>
> http://kenai.com/projects/**btrace/pages/UserGuide<http://kenai.com/projects/btrace/pages/UserGuide>
>
> Hope this helps & best regards,
> Andreas
>
>
> Am 13.01.2013 21:07, schrieb Taras Tielkes:
>
>  Hi,
>>
>> Are there some (semi-) public counters available to track how much work
>> is being performed with regards to finalization? I'm mainly interested in
>> finalized instance counts by class, rather than the current size of the
>> finalizer queue.
>>
>> Thanks,
>> -tt
>>
>
> --
> Andreas Loew | Senior Java Architect
> ACS Principal Service Delivery Engineer
> ORACLE Germany
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.openjdk.java.net/pipermail/hotspot-gc-use/attachments/20130126/3b37c90a/attachment.html