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Re: Where are all my "memories" gone?

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  • Subject: [mg122796] Re: Where are all my "memories" gone?
  • From: Vince Virgilio <blueschi at>
  • Date: Thu, 10 Nov 2011 06:56:42 -0500 (EST)
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  • References: <j8r9c7$3ig$>
  • Reply-to: comp.soft-sys.math.mathematica at

Happens to me frequently, as long as I can remember. I have found a persistent disparity between the host OS (Windows XP or 7) resource monitor and Mathematica's report of similar via MemoryInUse[]. Sometimes the disparity is very large, other times it is not. The host report matters most to me, since I often share other users' desktop CPU and memory via gridMathematica.

I certainly do not know how to reduce Mathematica's total memory footprint to align it with what MemoryInUse[] gives. Seems like a deep problem that WRI should address. Perhaps they're being lazy with their caches.

Rather, knowledge is power. My workaround on Windows is to make an external call to "typeperf" from within Mathematica. Such as the following. It's not Linux, but the idea might help.

counters =
  "\"\\\\" <> # <>
      "\\Memory\\Available Bytes\" " & /@ {"your host1 name here",
     "your host2 name here", "etc"} // StringJoin;
free = ReadList["!typeperf " <> counters <> "-sc 1",
     Word, RecordLists -> True, WordSeparators -> {","}][[2, 2 ;;]] //
    ToExpression // ToExpression

Vince Virgilio

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