restart after yum update (6.6)?

[Mateusz Guz <Mateusz.Guz@xxxxxxxxxx>]

Hi,

according to this :

http://unix.stackexchange.com/questions/28144/after-yum-update-is-it-a-good-idea-to-restart-the-server

i should reboot my server after updating packages i.e: kernel, glibc, libc.
Maybe it's a silly question, but Is it necessary if I don't use graphical environment ? (and don't want to use the latest kernel yet)
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