[Haskell-cafe] +RTS -M800M

Simon Marlow simonmar at microsoft.com
Tue Dec 20 15:04:14 EST 2005

On 17 December 2005 21:57, Ketil Malde wrote:

> "Simon Marlow" <simonmar at microsoft.com> writes:
>> On 16 December 2005 10:05, Joel Reymont wrote:
>>> I'm trying to restrict GHC to 800Mb of heap at runtime by passing in
>>> +RTS -M800M, the machine has 1Gb of memory and top shows free
>>> physical memory dropping below 175Mb.
>> -M800m should do more or less the right thing, but it is possible for
>> GHC to exceed this figure by a small percentage.
> Is there any chance there is a bug in recent GHCs (or perhaps Linux?)
> affecting this?  I'm fairly sure I've lately seen Haskell programs
> consuming significantly larger amounts of memory than they should be
> allowed to, and I can try to isolate a test case if it is of
> interest.

Please do isolate it if you can.  I'd be interested in investigating.


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