Hello Jochen,
I am using WiredTiger and am not seeing any unusual messages in the
mongod.log file, even when the mongod CPU usage spikes. Below are the top
five collections in the graylog db, the sizes (in bytes) don't seem out of
this world (to me atleast).
{
"name" : "alarmcallbackhistory",
"count" : 486,
"size" : 249533
},
{
"name" : "alerts",
"count" : 495,
"size" : 187138
},
{
"name" : "sessions",
"count" : 40,
"size" : 31200
},
{
"name" : "inputs",
"count" : 8,
"size" : 20421
},
{
"name" : "collector_configurations",
"count" : 1,
"size" : 18462
}
]
Let me know what you think.
Thanks for help,
Ari
On Monday, July 25, 2016 at 11:20:01 AM UTC-5, Jochen Schalanda wrote:
>
> Hi Ariel,
>
> MongoDB shouldn't need much processing power when being used by Graylog.
>
> Are there any error messages in the logs of your MongoDB nodes? Are there
> any unusually large collections in the MongoDB database used by Graylog?
>
> Which MongoDB storage engine (MMAPv1, WiredTiger) are you using?
>
>
> Cheers,
> Jochen
>
> On Tuesday, 19 July 2016 21:09:47 UTC+2, Ariel Godinez wrote:
>>
>> Hello,
>>
>> I am running the single node setup below:
>>
>> Graylog 2.0.3
>> MongoDB 3.2.7
>> Elasticsearch 2.3.3
>> Red Hat Enterprise Linux Server 6.5
>> Java 8
>> NXlog and Graylog Collector Sidecar for reading from local logs
>>
>> On average graylog is reading about 50 logs per second. MongoDB is not
>> being used for any other services other than graylog. Yet, occasionally I
>> notice that the system is hanging and proceed to do a *$top *where I
>> see that the mongod process is consuming well over 100% CPU. I'm wondering
>> if the load is just to heavy or if there is something wrong with my setup
>> that is causing mongod to overload.
>>
>> I am not seeing any warnings or errors in the graylog server logs or in
>> the mongod.log file when I look after a slowdown has occurred. Any advice
>> on how to further investigate would be much appreciated.
>>
>> Thanks,
>> Ari
>>
>>
>>
>
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