Out of Memory under AIX (Mathematica 5)
- To: mathgroup at smc.vnet.net
- Subject: [mg45058] Out of Memory under AIX (Mathematica 5)
- From: Holger Meinhardt <hme at vwl3.wiwi.uni-karlsruhe.de>
- Date: Mon, 15 Dec 2003 06:02:52 -0500 (EST)
- Reply-to: Holger Meinhardt <hme at vwl3.wiwi.uni-karlsruhe.de>
- Sender: owner-wri-mathgroup at wolfram.com
I do a lot of computation that needs a huge amount of physical memory. In the past, I tried to use for such computation an IBM RS/6000 SP with Mathematica Version 4.2 under AIX 4.3. But due to the fact that the version 4.2 was just a 32-bit system I could not pass the threshold of 2 gigabytes. Recently, the RS/6000 SP was upgraded to AIX 5.1 and the Mathematica version 5.0 was installed. Under AIX the new Mathematica version is a 64-bit system and I expect that I could pass the 2 gigabytes threshold without problems. Nevertheless, according to my monitor program Mathematica produces an Out of Memory message for every run I tried at about 1.85 gigabytes. Since the system provides more than enough physical memory the load of system could not cause this message. The values I can set with ulimit are listed below. The value for the stack size is the upper bound I can set under AIX 5.1. Have anyone a suggestion how to overcome this problem. bash-2.05a$ ulimit -a core file size (blocks, -c) 1048575 data seg size (kbytes, -d) unlimited file size (blocks, -f) unlimited max memory size (kbytes, -m) unlimited open files (-n) 2000 pipe size (512 bytes, -p) 64 stack size (kbytes, -s) 2064384 cpu time (seconds, -t) unlimited max user processes (-u) 256 virtual memory (kbytes, -v) unlimited ------------------------------------------------------------------------------- Holger Meinhardt Institute for Statistics and Economic Theory University of Karlsruhe Zirkel 2 D-76128 Karlsruhe Tel.: (+49)(721) 608-4784 Fax.: (+49)(721) 608-3082 E-mail: hme at vwl3.wiwi.uni-karlsruhe.de -------------------------------------------------------------------------------