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<tt>Hi Bengt,</tt><tt><br>
</tt><tt><br>
</tt><tt>Well, that's already done and it did improve things</tt>.<br>
<pre>argv[21]: -XX:+ParallelRefProcEnabled
argv[22]: -XX:ParallelGCThreads=48
before -XX:+ParallelRefProcEnabled was set the stop times were in the range of 20 to 60 seconds.
The application is a Cacao by Oracle. So they cannot change it.
Thanks and Regards
Thomas
</pre>
<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 05/16/14 12:58, Bengt Rutisson
wrote:<br>
</div>
<blockquote cite="mid:5375EF5A.3050707@oracle.com" type="cite">
<br>
Hi Thomas,
<br>
<br>
It looks like the application is using a lot of Reference objects.
The time spent in remark is dominated by reference processing. See
the attached graph generated from the log file you sent.
<br>
<br>
You can try to see if adding -XX:+ParallelRefProcEnabled improves
the situation.
<br>
<br>
If the customer is interested in updating their application they
might want to see if they can reduce the number of
java.lang.ref.Reference objects they use.
<br>
<br>
Hths,
<br>
Bengt
<br>
<br>
<br>
On 2014-05-16 10:26, Thomas Viessmann wrote:
<br>
<blockquote type="cite">Hi,
<br>
<br>
<br>
I've been tuning a Java 7u51, Solaris 10, T4 system with 24G
heap.
<br>
My customer is not very happy with the remark pauses of up to 2
seconds.
<br>
-XX:ParallelGCThreads=48 turned out to be the optimum. Here is
the log file
<br>
which contains the java args at the top:
<br>
<br>
<a class="moz-txt-link-freetext" href="http://aubing.de.oracle.com/gclog/gc_log_03052014.log">http://aubing.de.oracle.com/gclog/gc_log_03052014.log</a>
<br>
<br>
Any idea to drive the remark stop times further down?
<br>
<br>
<br>
Thanks and Regards
<br>
<br>
Thomas
<br>
</blockquote>
<br>
</blockquote>
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