-M works strangely

[S.D.Mechveliani]

Dear ghc-5.02-linux-i386-unknown,

I doubt about your -M option work.
I command (on  32M RAM machine), 

  ghci +RTS -M16m -RTS
  ...
  Prelude> sum [1..333000]
  GHC's heap exhausted;
  while trying to allocate 0 bytes in a 19996672-byte heap;
  use the `-H<size>' option to increase the total heap size.

The  top  command measures the memory on other linux terminal.
And it shows  92%  usage of memory in some moment, 
then, the disk starts to work hardly,
and only then, `heap exhausted' appears.

Setting -M8m prevents such expansion.

By the way, there was announced something about changes of meaning
with  -H, -M ...
But I had not noticed the change.
Was it for default values?

-----------------
Serge Mechveliani
mechvel at botik.ru