We've got a handful of apache/PHP/mysql servers running here, and I've noticed that not one of them have the
noatime option specified in any of their fstabs. Given that the PHP applications running on them tend to spider out into dozens of includes for every request I figure we should be able to decrease a bit of the load on the filesystem by turning off
I've checked around and no one either needs to know the access times on anything, or was even aware that that was a thing, so what I would like to do is simply:
mount -o remount,noatime /
However, there are 2 concerns:
- MySQL dying because the filesystem disappeared for a microsecond. In which case I'd just stop it temporarily.
- The OS dying because of the same.
I'm not crazy about the prospect of rebooting these machines since most of them have several times more uptime as I've been with this company, and who knows what is going to go sideways on a reboot.
So, is there any actual, fact-based reason why I should not remount the root partition while the server is running?