RE: [Haskell-cafe] +RTS -M800M

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

"Simon Marlow" writes:

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On 16 December 2005 10:05, Joel Reymont wrote:

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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.

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-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. Cheers, Simon