I am new to the world of Adabas on Windows. I have my first database up on a Windows server and I would like to put 3 more databases on this server. Is there anything about running 4 lightly used (less than 20 million commands per week on all databases combined) Adabas on Windows that should concern me? The server has a single instance of Adabas Version 6.5.0.2 running on a Windows Server 2012 R2. The CPU is a 6 core Intel® Xeon® Processor E5-2640 with 8GB of RAM.
No, nothing to be concerned of at all 
Depending on what else will be running on that server 8GB sounds fine and you’ll be able to define reasonable large bufferpools etc.
Good to hear. I was just looking for a little reassurance with what we are doing.