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From Spico Florin <spicoflo...@gmail.com>
Subject Re: Usage of G1 Garbage collector
Date Fri, 03 Jun 2016 20:31:49 GMT
than you very much for sharing these. i hope that others will contribute.
regards,
florin

On Friday, June 3, 2016, Stephen Powis <spowis@salesforce.com> wrote:

> Here's the flags we're using:
>
> -Xms3G -Xmx3G -XX:MaxPermSize=100M  -Xloggc:gc-%ID%.log
> -XX:+PrintGCDateStamps -XX:+PrintGCDetails -XX:+PrintTenuringDistribution
> -XX:+PrintGCApplicationStoppedTime -XX:+DisableExplicitGC -XX:+UseGCLogFileRotation
> -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=50M -XX:+UseCompressedOops -XX:+AlwaysPreTouch
-XX:+UseG1GC
> -XX:MaxGCPauseMillis=20 -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=OOMDump-%ID%.log
>
> Here's a link to a GC log analysis (takes several minutes to load)
>  http://gceasy.io/my-gc-report?p=L2hvbWUvcmFtL3VwbG9hZC9pbnN0YW5jZTEvc2hhcmVkLzIwMTYtNi0zL2djbG9nLnppcC0wLTU3LTE3
>
> This is definitely outside the realm of my knowledge, so don't use this as any kind of
benchmark.
> I'm curious if anyone can comment on any suggested adjustments?  I feel like we have
a ton of churn
> in our young gen, but really don't have the experience tuning java's GC or any examples
to compare it with.
>
> Thanks!
>
>
> On Fri, Jun 3, 2016 at 3:41 PM, Otis Gospodnetić <
> otis.gospodnetic@gmail.com
> <javascript:_e(%7B%7D,'cvml','otis.gospodnetic@gmail.com');>> wrote:
>
>> Hi,
>>
>> +1 for G1 for large heaps where you are seeing big GC pauses.  Works well
>> for us.
>> See:
>> https://sematext.com/blog/2013/06/24/g1-cms-java-garbage-collector/
>>
>> Otis
>> --
>> Monitoring - Log Management - Alerting - Anomaly Detection
>> Solr & Elasticsearch Consulting Support Training - http://sematext.com/
>>
>>
>> On Tue, May 31, 2016 at 5:21 AM, Spico Florin <spicoflorin@gmail.com
>> <javascript:_e(%7B%7D,'cvml','spicoflorin@gmail.com');>> wrote:
>>
>>> Hello!
>>>  I would like the community  the following:
>>> 1. Are you using the G1 garbage collector for your workers/supervisors
>>>  in production?
>>> 2. Have you observed any improvement added by adding this GC style?
>>> 3. What are the JVM options that you are using and are a good fit for
>>> you?
>>>
>>> Thank you in advance.
>>>  Regards,
>>>  Florin
>>>
>>>
>>
>

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