title: Real GHC RTS memory usage
body: <p>Now when <a href="https://stackoverflow.com/questions/4082375/haskell-ghc-runtime-memory-usage-or-what-do-i-do-wrong/4082434#4082434">Ganesh Sittampalam</a> shed some light on GHC RTS memory management I have another question: what means exist to check, how much of allocated memory is "bound" and how much of it is not used at the moment? </p>