On Wed, Apr 8, 2009 at 12:14 PM, kcrisman <kcris...@gmail.com> wrote: > >> You probably don't have nearly enough RAM to support running several >> Sage processes. Perhaps your use of ulimit to limit resource >> consumption isn't setup very well. It's hard to give you any >> information at all though, given that your email question doesn't >> clearly summarize all the details about your current Sage notebook >> install. There are infinitely many ways to configure a Sage notebook >> server. > > Just as a postscript, this (very new) problem we are having turns out > to have nothing to do with memory etc, at least not directly. > Instead, the following process in the virtual machine seems to be the > problem: > > python /usr/local/sage/local/bin/twistd --pidfile=sage_notebook/ > twistd.pid -ny sage_notebook/twistedconf.tac
That process is the Sage notebook server. > > It consumes between 99% and 100% of all CPU on the VM whenever one > attempts to evaluate, e.g., 2+2. For minutes on end, with no other > users doing anything. Eventually, when people give up or the > calculation ends or is interrupted, it goes back to a quiescent > state. It starts up immediately upon starting the machine, which is > done with the additional instruction Your Sage notebook is probably seriously misconfigured. Not knowing anything further and not having access, I have no idea how. I've never seen the actual problem you're describing though. I hope you figure it out. William > > su - notebook > > but everything else is the same as anywhere else. For instance each > new worksheet or user or whatever is via > > bash -c ulimit -v 500000; sage -python -u > > On my own installation of 3.4 I have similar extremely slow issues in > the notebook, e.g. checking whether a Legendre symbol is + or -1 takes > around two minutes, with a huge amount due to this process. > > - kcrisman > > > -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
