-" -q1 Use one OS thread for GC (turns off parallel GC)",
-" -qg<n> Use parallel GC only for generations >= <n> (default: 1)",
-" -qb Disable load-balancing in the parallel GC",
-" -qa Use the OS to set thread affinity",
+" -qg[<n>] Use parallel GC only for generations >= <n>",
+" (default: 0, -qg alone turns off parallel GC)",
+" -qb[<n>] Use load-balancing in the parallel GC only for generations >= <n>",
+" (default: 1, -qb alone turns off load-balancing)",
+" -qa Use the OS to set thread affinity (experimental)",