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From Paulo Ricardo Motta Gomes <paulo.mo...@chaordicsystems.com>
Subject Re: Nodes get stuck in crazy GC loop after some time, leading to timeouts
Date Wed, 03 Dec 2014 10:45:42 GMT
Thanks a lot for the help Graham and Robert! Will try increasing heap and
see how it goes.

Here are my gc settings, if they're still helpful (they're mostly the
defaults):

-Xms6G -Xmx6G -Xmn400M -XX:+UseParNewGC -XX:+UseConcMarkSweepGC
-XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=8
-XX:MaxTenuringThreshold=1 -XX:CMSInitiatingOccupancyFraction=75
-XX:+UseCMSInitiatingOccupancyOnly -XX:+UseTLAB
-XX:+CMSParallelInitialMarkEnabled -XX:+CMSEdenChunksRecordAlways

On Wed, Dec 3, 2014 at 2:17 AM, Jason Wee <peichieh@gmail.com> wrote:

> ack and many thanks for the tips and help..
>
> jason
>
> On Wed, Dec 3, 2014 at 4:49 AM, Robert Coli <rcoli@eventbrite.com> wrote:
>
>> On Mon, Dec 1, 2014 at 11:07 PM, Jason Wee <peichieh@gmail.com> wrote:
>>
>>> Hi Rob, any recommended documentation on describing
>>> explanation/configuration of the JVM heap and permanent generation ? We
>>> stucked in this same situation too. :(
>>>
>>
>> The archives of this list are chock full of explorations of various
>> cases. Your best bet is to look for a good Aaron Morton reference where he
>> breaks down the math between generations.
>>
>> I swear there was a blog post of his on this subject, but the best I can
>> find is this slidedeck :
>>
>> http://www.slideshare.net/aaronmorton/cassandra-tk-2014-large-nodes
>>
>> =Rob
>>
>>
>


-- 
*Paulo Motta*

Chaordic | *Platform*
*www.chaordic.com.br <http://www.chaordic.com.br/>*
+55 48 3232.3200

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