http://www.mapleprimes.com/posts/41578-Why-Cant-Maple-11-Use-All-My-Memory en-us 2026 Maplesoft, A Division of Waterloo Maple Inc. Maplesoft Document System Wed, 10 Jun 2026 21:33:48 GMT Wed, 10 Jun 2026 21:33:48 GMT The latest comments added to the Post, Why can't Maple 11 use all my memory on 64 bit windows http://www.mapleprimes.com/images/mapleprimeswhite.jpg http://www.mapleprimes.com/posts/41578-Why-Cant-Maple-11-Use-All-My-Memory http://www.mapleprimes.com/posts/41578-Why-Cant-Maple-11-Use-All-My-Memory?ref=Feed:MaplePrimes:Why can't Maple 11 use all my memory on 64 bit windows:Comments#comment77548 Try contacting Maplesoft Technical Support with what you are finding and the worksheet that is causing this. This will allow people at Maplesoft to investigate what the cause of the problem is. Scott The latest comments added to the Post, Why can't Maple 11 use all my memory on 64 bit windows 77548 Sat, 07 Apr 2007 05:55:35 Z Scott03 Scott03 http://www.mapleprimes.com/posts/41578-Why-Cant-Maple-11-Use-All-My-Memory?ref=Feed:MaplePrimes:Why can't Maple 11 use all my memory on 64 bit windows:Comments#comment77547 I don't see 64bit Windows (XP or Vista) as fulfilling the system requirements of Maple 11, on this webpage, <a href=http://www.maplesoft.com/products/Maple11/system_requirements.aspx>http://www.maplesoft.com/products/Maple11/system_requirements.aspx</a> acer The latest comments added to the Post, Why can't Maple 11 use all my memory on 64 bit windows 77547 Sat, 07 Apr 2007 07:19:58 Z acer acer http://www.mapleprimes.com/posts/41578-Why-Cant-Maple-11-Use-All-My-Memory?ref=Feed:MaplePrimes:Why can't Maple 11 use all my memory on 64 bit windows:Comments#comment77540 At the very core of Maple, it uses hashing to make all objects 'unique'. This means that, over time, objects get distributed fairly uniformly over all of memory. This wreaks havoc with all caching mechanisms of the CPU. In other words, because Maple naturally has low memory locality of objects (when doing long <b>symbolic</b> computations, numerical linear algebra doesn't count), almost all accesses to an object will require going to actual memory instead of cache. Because memory access is 30-100 times slower than cache access, this is very noticeable. The latest comments added to the Post, Why can't Maple 11 use all my memory on 64 bit windows 77540 Sat, 07 Apr 2007 17:45:50 Z JacquesC JacquesC http://www.mapleprimes.com/posts/41578-Why-Cant-Maple-11-Use-All-My-Memory?ref=Feed:MaplePrimes:Why can't Maple 11 use all my memory on 64 bit windows:Comments#comment77537 As acer points out, there isn't a 64-bit version of Maple 11 for Windows, so right there the maximum amount of memory that Maple can address is limited to 4GB of RAM. In fact, the real amount Maple can use is probably only 2GB, because the operating system partitions each application's address space and dedicates some large fraction of the memory to itself (so that the application can access operating system services). The default partition in Windows is 2GB/2GB. You can increase this to give each application 3GB of memory by adding a line to boot.ini, as described here: http://www.microsoft.com/whdc/system/platform/server/PAE/PAEmem.mspx Note that this happens on all multiprocess operating systems, not just Windows. On Linux there there is an option in the kernel to use 3GB/1GB. I'm not sure what OSX uses, does anybody know ? Are you using the 64-bit version of Windows ? There may be a compatibility problem. You should try to start the command line version of Maple and paste in your program and see if it runs. The latest comments added to the Post, Why can't Maple 11 use all my memory on 64 bit windows 77537 Sat, 07 Apr 2007 22:05:21 Z roman_pearce roman_pearce