simple questions about +RTS -s output

Simon Marlow marlowsd at
Thu Sep 18 08:47:39 EDT 2008

Peter Hercek wrote:
> Hi,
> There is an example of +RTS -s output at the end.
> I have few simple questions:
> What does "9 Mb total memory in use" mean?
> Is it in mega bytes (MB) or in mega bits (Mb)?
>  I would expect memory usage to be in bytes (B)
>  but a unit for bits (b) seems to be used.
>  Looks like heap size in mega bytes...

It's mega bytes (MB).  I fixed the abbreviation a while ago, it'll be 
correct in 6.10.1.  Also there are some new stats about the amount of 
memory being wasted due to fragmentation in the memory allocator.


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