Did you ever find a solution to this? I am having the same issue on a 
graylog 2.0 server. 


On Monday, May 2, 2016 at 5:03:48 AM UTC-4, oliv....@gmail.com wrote:
>
> And I also upgraded to graylog 2.0GA
>
> Le lundi 2 mai 2016 11:01:10 UTC+2, oliv....@gmail.com a écrit :
>>
>> I've just upgraded the ram and cpu of all the nodes but I still got the 
>> same issue. Process and output buffers are at 100% and the journal keeps on 
>> filling.
>> Here is the new configuration:
>> graylog server with 9 vcpu and 8 gig of ram (4gig allocated to graylog)
>> elasticsearch nodes with 4 vcpu and 8 gig of ram (4 gig allocated to 
>> elasticsearch)
>>
>> Is there any metrics that could help to find where the bottleneck is ?
>>
>> Thanks !
>>
>> Le mardi 26 avril 2016 16:22:12 UTC+2, Peter Krammer a écrit :
>>>
>>> Based on that both the Process and the Output buffers are full, I would 
>>> say your elasticsearch nodes are not fast enough. 
>>> They seem undersized in my eyes and should have more CPU and RAM. 
>>> Also check if you set your -Xms and -Xmx settings (for both graylog and 
>>> elasticsearch) to reasonable values, it helped me alot to increase them to 
>>> half of my RAM size. (eg. -Xms8g -Xmx8g )
>>>
>>

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