There is currently a naming mismatch between EKG and GHC.Stats.

For example, we have

     , ("rts.gc.current_bytes_used"       , Gauge . fromIntegral . Stats.gcdetails_live_bytes . Stats.gc)

so current_bytes_used = gcdetails_live_bytes.

This is due to the 2 years old GHC commit ghc/ghc@24e6594#diff-00007a115377c1a1c96e619128dcb206L236 which did this rename.

Should EKG eventually follow the new naming?

It's weird when some stats have the same names as their GHC.Stats counterparts, but others don't.