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