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Hi all,<br>
<br>
<br>
two comments from my side. I work in support and have tuned about 50
applications<br>
in the past decade. My experience with iCMS was not as good as
Kirk's. Actually I've<br>
never come across a scenario where iCMS could beat regular CMS. At
least not on<br>
big server systems. CMS always gave better results, either by
configuring sufficiently <br>
big eden/survivors or, surprisingly, by configuring instant
promotion (small eden, no survivors).<br>
<br>
Maybe from an engineering/testing perspective GC consolidation is a
good idea. On the other hand<br>
we in support have seen lots of bugs and crashes in the GC space. It
was very helpful that<br>
we could offer our customers choices to work around. E.g.
temporarily replace CMS by iCMS<br>
or parallel with serial. Keep that in mind please.<br>
<br>
Thanks and Regards<br>
<br>
Thomas <br>
<br>
<br>
<br>
I've come<br>
<div class="moz-cite-prefix">On 12/07/12 00:35, Bernd Eckenfels
wrote:<br>
</div>
<blockquote cite="mid:op.wow45kyc06c450@eckenfels02.seeburger.de"
type="cite">Am 06.12.2012, 23:10 Uhr, schrieb Kirk Pepperdine
<a class="moz-txt-link-rfc2396E" href="mailto:kirk@kodewerk.com"><kirk@kodewerk.com></a>:
<br>
<br>
<blockquote type="cite">I appreciate the desire to remove unneeded
code from the JVM. I think you are right... in the cases where I
did move customers to the serial collector I could have just as
easily tuned the parallel collector down So, getting rid of
serial wouldn't be seen as a loss in my books.
<br>
</blockquote>
<br>
Actually it would be a very big win for CMS, but before the code
can be removed the ParallelOld needs to be CMS enabled. So I guess
it is harder to remove the actual code, but at least it can be
removed from some of the other GC combinations.
<br>
<br>
The question is, if a serial single threaded GC is not needed for
some reference purposes, correctness proofs or similiar?
<br>
<br>
Gruss
<br>
Bernd
<br>
</blockquote>
<br>
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