On Tue, Oct 25, 2011 at 10:54 AM, William Stein <wst...@gmail.com> wrote: > On Tue, Oct 25, 2011 at 9:50 AM, Jason Grout > <jason-s...@creativetrax.com> wrote: >> On 10/21/11 10:32 AM, William Stein wrote: >> >>> Instantly after doing this *demo* became much faster. >>> I noticed before doing this that there was a single sagenb server >>> Python process running in top using a lot of cpu.. >> >> For future reference, it would have been *great* to get a stack trace of the >> currently executing code for the runaway process. I followed the >> instructions in a stack overflow answer [1] and can now do, as the sagenb >> user on mod: >> >> gdb -p <PID of sagenb process> >> pystack >> >> and get a stack frame listing of a running process. >> >> As I have time, I'll look into where there might be a performance >> regression, but there have been a lot of code changes between June and now, >> and we haven't seen the performance regression on test.sagenb.org. >> >> Is there a possibility of running the new codebase for sagenb.org again and >> getting the stack trace when the process is using that much CPU? >> > > I'm personally not super comfortable with this, especially if I have > to have to be the one responsible for fixing things when they > inevitably break and cause trouble. From the second I switched back > to the old version until now, I haven't had any complaints about any > *.sagenb.org's not working, and haven't had to restart them, etc. So > I'm only OK with this if you're 100% on deck, and I don't have to do > anything, and you switch it all back as soon as you can.
(at least that is, this quarter -- I plan to work a lot on the notebook next quarter) > > Of course, the right thing to do is write code to simulate a heavy > load, and run it against test.sagenb.org (or something like that). > > -- William > >> Thanks, >> >> Jason >> >> >> [1] >> http://stackoverflow.com/questions/132058/getting-stack-trace-from-a-running-python-application/147114#147114 >> >> >> >> -- >> 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 >> URL: http://www.sagemath.org >> > > > > -- > William Stein > Professor of Mathematics > University of Washington > http://wstein.org > -- William Stein 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 URL: http://www.sagemath.org
