1 server suddenly slow

[John Harmon]

Just wondering what I can look at for a slow server.  It used to be just as fast as the others, but now it takes 3x as long when running Ansible playbooks against it (or even just gathering facts).  It still works, just slow.  My 50-60+ other servers are just fine.  Where would you look to troubleshoot this?  SSH to the server is quick without Ansible.  The server isn't under any load and there are plenty of resources.