Bad performance on a better spec server than a weaker one

What steps will reproduce the problem?
1. All the information can be found here.
2. 
http://serverfault.com/questions/574906/disk-performance-low-in-dell-poweredge-r
720-server
3. Especially see this answer and comments. 
http://serverfault.com/a/575478/59618

What is the expected output? What do you see instead?
I would expect faster perf on new server, but it's much worse.

What version of the product are you using? On what operating system?
glog 0.3.3.

Please provide any additional information below.

Original issue reported on code.google.com by dumi...@snapinnovations.com on 14 Feb 2014 at 2:42

wangzhangup / google-glog

Bad performance on a better spec server than a weaker one #186