Let me start with a quick overview of my setup:
- Moodle 3.0.2
- on Ubuntu 14.04 LTS
- running on Azure VM (IaaS)
- Share drive between VM is a CIFS Azure File storage
I suspect that the CIFS Azure File storage is too slow for Moodle. Can you have a look at the picture below? Admin area can often take 20+ seconds to load up:
Many thanks for having taken the time to look into this.