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[ale] Ouch

Good data. Thanks. 

On Wed, 2018-01-03 at 07:47 -0500, Solomon Peachy via Ale wrote:
> On Tue, Jan 02, 2018 at 10:24:07PM -0500, Raj Wurttemberg via Ale
> wrote:
> > Ohh.. yeah... Ouch!!  A 30% performance hit?!?!  
> 
> It's actually not _that_ bad -- it's a significant performance hit
> on 
> making system calls -- the only measurements I've seen have shown a
> 38% 
> increase in the overhead to read() --actual processing is unaffected.
> 
> On the other hand, I/O intensive workloads are the most heavily 
> impacted.  The PostgreSQL folks have done some preliminary
> benchmarks 
> and it's not pretty:
> 
>   https://www.postgresql.org/message-id/20180102222354.qikjmf7dvnjgbk
> xe at alap3.anarazel.de
> 
>  - Solomon
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