I have created a guest Linux machine (Centos 7) under my default user account, but its been an hour that guest OS is still  in pending status.
How long does it take for a virtual machine to be created ?
 
I shall mention that I am running Hosting Controller version 9 build 6 with VMware Esxi 5.0

Virtual machine creation should automatically start within 15 seconds. Try to restart the HC remoting service to see if this make any difference or not.
 
I will also recommend to apply the latest HC build.

I have recreated the master template with fixed minimal size 8GB, now the virtual machine creation process is much faster and there is no delay in creation.

JeffLewis

I have recreated the master template with fixed minimal size 8GB, now the virtual machine creation process is much faster and there is no delay in creation.

Great ! I would like to know have you ever tried virtual desktops? Virtual machines can be remotely accessible via vdi`s
 
Adrian Gates
Sr. Cloud Expert - Apps4Rent