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From Mark Curtis <>
Subject Re: Partition size
Date Fri, 09 Sep 2016 16:40:23 GMT
On 9 September 2016 at 16:47, Rakesh Kumar <>

> On Fri, Sep 9, 2016 at 11:46 AM, Mark Curtis <>
> wrote:
> > If your partition sizes are over 100MB iirc then you'll normally see
> > warnings in your system.log, this will outline the partition key, at
> least
> > in Cassandra 2.0 and 2.1 as I recall.
> Has it improved in C* 3.x. What is considered a good partition size in C*
> 3.x

The 100MB is just a default setting you can set this up or down as you need

There isn't really a "good" or "bad" value, it all depends on the data
model, your query patterns and required response times as to what's
acceptable for your application. The 100MB default is just a guide.

If you're seeing partitions of 1GB and above then you may very well start
to see problems. Again cfstats is your friend here!


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