These are currently undocumented, and some require configure options to have been specified (like -mpipktsize and -chmemdebug). The -mpiversion option is useful for finding out how your installation of mpich was configured and exactly what version it is.
-mpiqueue
-mpiversion
-mpipktsize
-mpedbg
-mpichdebug
-chmemdebug
-mpichmsg
These will be explained in the next version of this Guide.