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Ramki.,<br>
<br>
On 12/09/2011 07:34 PM, Srinivas Ramakrishna wrote:
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<br>
A couple of things caught my eye....<br>
<br>
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On 12/05/2011 02:19 PM, Florian Binder wrote:<br>
>> I assume you know when the data will be dropped and
reinitialized,<br>
>> right? Can you do a Full GC (with System.gc())
after you re-initialize<br>
>> the heap. This typically helps a lot with CMS.<br>
> Yes, this is exactly what we are trying at this time
;-)<br>
> Either this Full-GC pauses are very long (60-300
seconds) they are much<br>
> shorter than after a CMS-failure (when they take
sometimes more than<br>
> 4000 seconds ;-)) and we can define when they occure.<br>
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A full GC that takes an hour is definitely a bug.</div>
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<br>
Good catch, I clearly didn't do the translation. :-) Could it be
paging?<br>
<br>
Tony<br>
<br>
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<div> Have you logged that bug?<br>
Or at least share the GC log? What's the version of the JDK
that this behaviour<br>
was seen with?<br>
<br>
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<div>... <br>
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> Furthermore this should not increase the
total-heap-space:<br>
> <a moz-do-not-send="true"
href="http://java4.info/g1/all.png" target="_blank">http://java4.info/g1/all.png</a><br>
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Remember that jconsole asynchronously samples the heap, whose
size is<br>
read "with possible glitches". Rather, you should probably
rely on the GC log in order to assess<br>
the heap size after each GC event, rather than the
asynchronous samples from<br>
jconsole. I myself have not had the chance to look at yr GC
logs to see<br>
what that indicated wrt the size of Eden and of the Heap.<br>
<br>
-- ramki<br>
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