Using yum to update production servers

[Jonathan Carpenter]

I have a few servers running Fedora 4 core, And I would like to keep them
update using yum. This way I will have the security updates and such. I have
been using the command from the
fedora.redhat.comhttp://fedora.redhat.com/website

*su -c '/sbin/chkconfig --level 345 yum on; /sbin/service yum start'

But I do have a few servers that run as postgresql and mysql databases
will yum wipe my database if it decides or see an update for
mysql or postgres*

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Jonathan Carpenter
Linux System Administrator
Windows System Administrator