ramkrishna.s.vasudevan commented on HBASE-20188:

I can help out with the AsyncWAL testing here. 
One suggestion , 
Pls try to compile your ycsb hbase-client with 2.0 client libraries and then 
run the tests. We found that the 1.1 client library has contention issues 
because of connection sharing. Though it is a different client side topic it 
can be helpful to get the actual server readings for 2.0 IMHO.

> [TESTING] Performance
> ---------------------
>                 Key: HBASE-20188
>                 URL: https://issues.apache.org/jira/browse/HBASE-20188
>             Project: HBase
>          Issue Type: Umbrella
>          Components: Performance
>            Reporter: stack
>            Priority: Critical
>             Fix For: 2.0.0
> How does 2.0.0 compare to old versions? Is it faster, slower? There is rumor 
> that it is much slower, that the problem is the asyncwal writing. Does 
> in-memory compaction slow us down or speed us up? What happens when you 
> enable offheaping?
> Keep notes here in this umbrella issue. Need to be able to say something 
> about perf when 2.0.0 ships.

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