How to fix slow yum

Firstly test if you don’t have a network issue

https://alltime.pp.ua/blog/how-to-test-internet-speed-via-command-line/

If its ok, try to wipe out cache

yum clean all

The problem is still here: install fastestmirror plugin

yum install yum-plugin-fastestmirror -y

If installed try to disable

vi /etc/yum/pluginconf.d/fastestmirror.conf

from
enabled=1
to
enabled=0

Wipe out cache:

yum clean all