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A comment on Has Amazon EC2 become over subscribed? (2010). Parent comment

Re:Has Amazon EC2 become over subscribed? (2010) by Xorlev on Sunday April 21, 2013 @11:30PM (#5587613)
c1.xlarges are thought to be effectively the only VM on a machine. I can't dig up the article that proposed the methodology for determining offhand.

c1.xlarges still underperform far under what I'd expect.

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Re:Has Amazon EC2 become over subscribed? (2010) by sliverstorm on Sunday April 21, 2013 @11:48PM (#5587673)
Are VMs ever really performant?
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Re:Has Amazon EC2 become over subscribed? (2010) by Xorlev on Monday April 22, 2013 @12:37AM (#5587800)
Compared to the 26 ECU m3.2xl, the 20 ECU c1.xl underperforms it by 3x (basic web, JSON struct) in my tests.
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Re:Has Amazon EC2 become over subscribed? (2010) by corresation on Monday April 22, 2013 @09:52AM (#5589221)
Modern hypervisors have an overhead as low as 2%, so yes, they absolutely are. It is often worth virtualizing simply for the flexibility/management that it bring, even if it's a single virtual machine on a very large box.
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