<html><head></head><body><div>Good data. Thanks. </div><div><br></div><div>On Wed, 2018-01-03 at 07:47 -0500, Solomon Peachy via Ale wrote:</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>On Tue, Jan 02, 2018 at 10:24:07PM -0500, Raj Wurttemberg via Ale wrote:
<blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex">
Ohh.. yeah... Ouch!! A 30% performance hit?!?!
</blockquote>
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:
<a href="https://www.postgresql.org/message-id/20180102222354.qikjmf7dvnjgbkxe@alap3.anarazel.de">https://www.postgresql.org/message-id/20180102222354.qikjmf7dvnjgbkxe@alap3.anarazel.de</a>
- Solomon
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</pre></blockquote><div><span><pre><pre>-- <br></pre>James P. Kinney III
Every time you stop a school, you will have to build a jail. What you
gain at one end you lose at the other. It's like feeding a dog on his
own tail. It won't fatten the dog.
- Speech 11/23/1900 Mark Twain
http://heretothereideas.blogspot.com/
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