Hello, Is it true that R-1.6.0 compiled under 64-bit is less efficient on using memory than compiled under 32-bit? Here are my observations: 1. I have an SGI IRIX box (2Gb RAM) running 32-bit version of R-1.5.0. It CAN handle a large data set (an 1111000 * 18 array). 2. For the same data set, on an IBM AIX 64-bit box (64GB RAM) with the new version of R-1.6.0, it gives an out of memory error. I am not sure if the problem is caused by 32-/64-bit compilation, or other AIX vs IRIX issues. Can the AIX problem be solved by compiling R-1.6.0 under 32-bit? Thanks! Simon =============================================================== Simon Lin, M.D. Ph: (919) 681-9646 FAX: (919) 681-8028 Lin00025 (at) mc.duke.edu Box 3958, Duke University Medical Center Durham, NC 27710 =============================================================== -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
On Wed, 23 Oct 2002, Simon M Lin wrote:> Hello, > > Is it true that R-1.6.0 compiled under 64-bit is less efficient on using > memory than compiled under 32-bit?Yes. Pointers take up twice as much space.> Here are my observations: > > 1. I have an SGI IRIX box (2Gb RAM) running 32-bit version of R-1.5.0. It > CAN handle a large data set (an 1111000 * 18 array). > 2. For the same data set, on an IBM AIX 64-bit box (64GB RAM) with the new > version of R-1.6.0, it gives an out of memory error. > > I am not sure if the problem is caused by 32-/64-bit compilation, or other > AIX vs IRIX issues.The pointer size difference shouldn't affect an array that much. -thomas -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._