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MathGroup Archive 1989

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Memory and Mathematica on NeXT 1.0

  • Subject: Memory and Mathematica on NeXT 1.0
  • From: uunet!byuvax.bitnet!SMITHW
  • Date: Fri, 22 Sep 89 11:25:41 -0500
  • Apparently-to: mathgroup-out at yoda.ncsa.uiuc.edu

   I have discovered that the memory handling characteristics of Mathematica
on the NeXT are possibly even worse than on the Macintosh.  After doing a big
compute (big for mathematica at least) and then LOGGING OUT, when I try to
login again I ge an error message daying "only blah blah characters
available, you may want to select destroy deleted files" or something to
that effect.  Apparently this brand of memory pig hangs onto the space unless
you actually turn the power off.  On this same compute the machine sucked up
28 meg of swap plus whatever ram is assigned to the process (about 4 meg?).  Thi
s was not a terribly large thing.  Just compute the inverse of a certain 10x10
symmetric matrix.  Maple 4.2 on the mac did it without a groan.
  I have discovered one good thing on the same system... the algorithm failed
messages come up much faster than they did in 0.9....

Bill Smith
smithw at byuvax  OR  smithw at yvax.byu.edu



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