Jan, If your code is entirely in J, with no dependencies on external programs or DLLs with 32 bit issues, you will likely be fine going from J32 to J64 on Win7_64.
Some of the external programs I deal with require 32 bit J usage. There is the possibility of converting my processing to entirely 64 bit code, but I haven't had the time to investigate that. You may very well be able to eliminate the "out of memory" messages by using J64. How well you program performs may depend on what its maximum real memory working set is. If you have enough real memory to back the address space you need, it should run well. If not, you may see enough paging to make your program run much more slowly than you would expect. See the following example for a program that ran out of memory on 32 bit J, ran in nearly exponential time (due to paging) on a J64 system with 2 gigabytes of memory and ran in almost linear time on a J64 system with 8 gigabytes of memory. http://www.jsoftware.com/jwiki/JDB/Netflix -- All the best, David Mitchell On 2/20/2010 13:52, Jan Jacobs wrote: > David, > what do you mean with "converted"? Is J64 not the same as J32 on J source > level? I hoped to get rid of the "out of memory" messages because of the > increased addresssing space without too much effort... > Thanks in advance, > Jan. > > On Sat, Feb 20, 2010 at 6:32 PM, David Mitchell<[email protected]>wrote: > >> Jan, >> >> I am using J64-602 on Win7Pro_64 as my primary J at the moment. I still >> have >> some 32 bit code I have not converted, so I still use J32-602 for those >> scripts. >> >> If you need the 64 bit address space, I can recommend J64-602. >> >> If you do not need the 64 bit address space, then J32-602 has worked fine >> for me >> on Win7Pro_64. >> >> If you are using J.EXE or J.DLL as servers, you will have to be careful >> about >> which ones you register, depending on the calling application. You can >> only >> have either the 32 bit or the 64 bit registered at a time, AFAIK. >> >> -- >> All the best, >> David Mitchell >> >> On 2/20/2010 8:42, bill lam wrote: >>> Neither did I try W7-64, but David Mitchell reported it OK. >>> >>> http://www.jsoftware.com/jwiki/Scripts/JfromExcel >>> >>> sab, 20 Feb 2010, Jan Jacobs skribis: >>>> No, I do not have the system yet. Do you expect that the J64 XP64 >> version >>>> will run under W7? >>>> >>>> On Sat, Feb 20, 2010 at 11:42 AM, bill lam<[email protected]> wrote: >>>> >>>> [---=| TOFU protection by t-prot: 10 lines snipped |=---] >>> >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm >> > > > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
