By the way for Workgroup Server the limitation is :-
then click on "Read the complete details on this trade-up option."
Informix Dynamic Server Workgroup Editions
The following restrictions apply:
Server Limitation - You may not install or use the program on a server
that has more than two processors.
Function Limitations - You may not use the following functions of the
program: parallel data query, data partitioning, parallel backup,
parallel restore, parallel load, parallel unload, optical disks,
Enterprise Replication (ER), High Availability Data Replication (HDR),
VML (ability to access more than two GB RAM).