[CentOS] kswapd taking 100% cpu with no swap on system

[Brunner, Brian T.]

> 
> Actually i dont have any issue with read and write,If you 
> have experience with Cassandra NoSQL database,Its very read 
> and write intensive.It will approximately  doing 10 Million 
> concurrent   read and writes.AS per Cassandra documentation 
> "Cassandra can write 50GB of data in 0.12 milliseconds, more 
> than 2,500 times faster than MySQL." 

50GB in 0.12 ms is 500TB in 1.2 second.
SATA III buses at 6GB/sec need a "parallelness" of (nearly) 100 channels
to soak up that data.
How many drives must be written-to in parallel to sustain that write
rate is ... Beyond my math skills.

Advertizing, or inadvertizing, has fudged a few numbers here.
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