I have a somewhat related problem: Since February (I do not recall the exact revision, but might very well be early in the 6.6 release cycle), I cannot do a parallel build with 4 processes on my notebook with 4 GB RAM anymore.
My observation was that cythonizing takes huge amounts of memory (~ 2 GB) per process. Interrupting it and typing make again reduced the maximum memory usage. I then tried to somehow compare that with 6.5 and tried to limit my memory with ulimit; but also then, cythonizing took lots of memory. I then stopped investigating this and resigned myself to parallel builds with two processes. Regards, CH Am 2015-04-20 um 19:10 schrieb Thierry: > Hi, > > i confirm i had the same issue on a "Genuine Intel(R) CPU T2050 @ 1.60GHz" > with 1GB of RAM (+1.5GB swap), the build of 6.5 was sucessful, but get stuck > for > 6.6. > > Ciao, > Thierry > > > > On Mon, Apr 20, 2015 at 09:33:24AM -0700, Andrey Novoseltsev wrote: >> Hello, >> >> Up to Sage-6.5 I was able to build it on my old laptop with 2GB RAM. It has >> swap as well, but I don't think it was used much, the wall time was just a >> bit bigger than user+system, about 8-9 hours. >> >> With Sage-6.6 it gets stuck while processing rings directory: swap is not >> full yet, but it seems that necessary stuff does not fit RAM anymore - >> heavy disk usage, low CPU temperature, not much progress after more than a >> day, top was showing "python setup.py" if I recall correctly consuming >> 1.5GB RAM and over 2.5GB virtual memory. This consistent over several >> attempts with "make distclean", with nothing running apart from MATE >> session and a terminal window. >> >> I realize that supporting builds on such computers may not be a high >> priority, if at all, but perhaps it is a manifestation of some bug. >> >> Besides, while 2GB total RAM seems small nowadays, 2GB/core is quite >> common, especially with VMs. (In fact, all physical and virtual machines >> that I use frequently happen to have exactly this number, ranging from >> 2GB/1 core to 32GB/16 cores.) >> >> Thank you, >> Andrey >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sage-devel" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to sage-devel+unsubscr...@googlegroups.com. >> To post to this group, send email to sage-devel@googlegroups.com. >> Visit this group at http://groups.google.com/group/sage-devel. >> For more options, visit https://groups.google.com/d/optout. > -- Univ.-Prof. Dr. Clemens Heuberger Alpen-Adria-Universität Klagenfurt Institut für Mathematik, Universitätsstraße 65-67, 9020 Klagenfurt, Austria Tel: +43 463 2700 3121 Fax: +43 463 2700 99 3121 clemens.heuber...@aau.at http://wwwu.aau.at/cheuberg -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
