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From Pranay akula <pranay.akula2...@gmail.com>
Subject Re: High load on few nodes in a DC.
Date Mon, 19 Sep 2016 15:04:33 GMT
Hai Jeff,

Thank, we are using RF 3 and cassandra version 2.1.8.

Thanks
Pranay.

On Mon, Sep 19, 2016 at 10:55 AM, Jeff Jirsa <jeff.jirsa@crowdstrike.com>
wrote:

> Is your replication_factor 2? Or is it 3?  What version are you using?
>
>
>
> The most likely answer is some individual partition that’s either being
> written/read more than others, or is somehow impacting the cluster (wide
> rows are a natural candidate).
>
>
>
> You don’t mention your version, but most modern versions of Cassandra ship
> with ‘nodetool toppartitions’, which will help you identify frequently
> written/read partitions – perhaps you can use that to identify a hotspot
> due to some external behavior (some partition being read thousands of
> times, over and over could certainly drive up load).
>
>
>
> -          Jeff
>
>
>
> *From: *Pranay akula <pranay.akula2323@gmail.com>
> *Reply-To: *"user@cassandra.apache.org" <user@cassandra.apache.org>
> *Date: *Monday, September 19, 2016 at 7:53 AM
> *To: *"user@cassandra.apache.org" <user@cassandra.apache.org>
> *Subject: *High load on few nodes in a DC.
>
>
>
> when our cluster was under load  i am seeing  1 or 2 nodes are on more
> load consistently when compared to others in dc i am not seeing any GC
> pauses or wide partitions  is this can be those nodes are continuously
> serving as coordinators ?? how can  i find what is the reason for high load
> on those two nodes ?? We are using Vnode.
>
>
>
>
>
> Thanks
>
> Pranay.
>

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