Can you quantify very bad performance? 

Jeff Jirsa

> On Jan 5, 2018, at 5:41 PM, Justin Sanciangco <> 
> wrote:
> Hello,
> I am currently benchmarking NVMe SSDs with Cassandra and am getting very bad 
> performance when my workload exceeds the memory size. What mount settings for 
> NVMe should be used? Right now the SSD is formatted as XFS using noop 
> scheduler. Are there any additional mount options that should be used? Any 
> specific kernel parameters that should set in order to make best use of the 
> PCIe NVMe SSD? Your insight would be well appreciated.
> Thank you,
> Justin Sanciangco

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