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Starting from version 2.6.30 (which was released 5 years ago), Linux has the option relatime enabled by default. It means updates of file access time are very infrequent and prudent.

But I still see recomendations to use noatime for databases or SSD discs. Are there any reason to use it? Does it make any measurable difference compared to relatime?

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Do you care about tracking access time of database files? If not, use noatime, I think it's that simple. –  mustaccio Feb 2 '14 at 20:26
@mustaccio use default configuration simpler –  valodzka Feb 2 '14 at 20:37
I never look at last access time of database files as these are being constantly accessed anyway! –  Colin 't Hart Feb 2 '14 at 21:01

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