I currently have a VM running Windows Server 2012 DC, with 4GB of RAM and a dual core CPU. This machine has Active Directory running, so is also a DNS and DHCP server.
The problem I have is thus: as soon as I install Exchange 2013, the machine is all but unusable. Everything grinds to a halt and rebooting takes forever. Once back up, it's no better.
The best example of how bad it gets is that other machines can't unresolved IPs through it anymore.
Alongside this, I can't access the OWA or ECP either, though I suspect the timeouts are due to the lack of resources.
Task Manager shows almost 100% of RAM is being used, with IIS the main culprit. The CPU usage doesn't look bad until I check the host, and the VirtualBox session is using 100% of the host CPU.
My question: I don't have much experience with IIS - where should I start trying to work this out? How is it using 4GB of RAM? The VM is also hammering the HDD, presumably paging due to the lack of RAM.