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Originally Posted by KlenTelaris
Hmm no comment why they just didn't added noatime  |
Well after all my posts, one person knows. I did think about mentioning what Linus calls the number one performance improvement you can make in Linux.
I figured we can assume noatime on any performance system by now because most sysadmins worth the title have heard what kernel developer Ingo Molnar said:
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Atime updates are by far the biggest IO performance deficiency that Linux has today. Getting rid of atime updates would give us more everyday Linux performance than all the pagecache speedups of the past 10 years, _combined_.
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Linus called atime "perhaps the most stupid Unix design idea of all times" and Alan Cox cited performance improvements of 50% to 100%, so I assumed the GFY admins have done that already.
(Though if they switched web servers and left atime on, yeah that would be a real screw up and a waste of time.)