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From Sourabh Agrawal <iitr.sour...@gmail.com>
Subject Re: High CPU load on one node in the cluster
Date Wed, 19 Feb 2014 16:47:29 GMT
Below is CPU usage from top. I don't see any steal. Idle time is pretty low.

Cpu(s): 83.3%us, 14.5%sy,  0.0%ni,  0.5%id,  0.0%wa,  0.0%hi,  1.7%si,
 0.0%st

Any other pointers?


On Wed, Feb 19, 2014 at 8:34 PM, Nate McCall <nate@thelastpickle.com> wrote:

> You may be seeing steal from another tenant on the VM. This article has a
> good explanation:
>
> http://blog.scoutapp.com/articles/2013/07/25/understanding-cpu-steal-time-when-should-you-be-worried
>
> In short, kill the instance and launch a new one. Depending on your
> latency requirements and operational ability to respond, you may want to
> consider paying for dedicated instances.
>
>
> On Wed, Feb 19, 2014 at 2:30 AM, Sourabh Agrawal <iitr.sourabh@gmail.com>wrote:
>
>> Hi,
>>
>> I am running cassandra 2.0.3 cluster on 4 AWS nodes. memory arguments are
>> the following for each node :
>> -Xms8G -Xmx8G -Xmn800M
>>
>> I am experiencing consistent high loads on one of the nodes. Each node is
>> getting approximately equal number of writes. I tried to have a look at the
>> logs and seems like CMS GC is running every 1-2 seconds.
>>
>> Any pointers on how to debug this?
>>
>> --
>> Sourabh Agrawal
>> Bangalore
>> +91 9945657973
>>
>
>
>
> --
> -----------------
> Nate McCall
> Austin, TX
> @zznate
>
> Co-Founder & Sr. Technical Consultant
> Apache Cassandra Consulting
> http://www.thelastpickle.com
>



-- 
Sourabh Agrawal
Bangalore
+91 9945657973

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