Issue Identified:

Yum commands (e.g., yum list) taking longer time to respond

# yum list

Updating Subscription Management repositories.
Unable to read consumer identity
\ Checking server status

Solution:

scenario 1:
cp -p /etc/yum/pluginconf.d/package_upload.conf /etc/yum/pluginconf.d/package_upload.conf.bak.$(date +%F_%H%M%S)
grep enabled /etc/yum/pluginconf.d/package_upload.conf
sed -i 's/^enabled *= *.*/enabled=0/' /etc/yum/pluginconf.d/package_upload.conf
grep enabled /etc/yum/pluginconf.d/package_upload.conf
scenario 2:
cp -p /etc/yum/pluginconf.d/subscription-manager.conf /etc/yum/pluginconf.d/subscription-manager.conf.bak.$(date +%F_%H%M%S)
grep '^enabled' /etc/yum/pluginconf.d/subscription-manager.conf
sed -i 's/^enabled *= *.*/enabled=0/' /etc/yum/pluginconf.d/subscription-manager.conf
grep '^enabled' /etc/yum/pluginconf.d/subscription-manager.conf