William Stein wrote: > On Wed, Dec 23, 2009 at 3:31 AM, Dr. David Kirkby > <[email protected]> wrote: >> David Joyner wrote: >>> On Tue, Dec 22, 2009 at 8:08 PM, Dr. David Kirkby >>> <[email protected]> wrote: >>>> I've just set this Sage 4.2.1 server up. >>>> >>>> It's on my home computer, on a slow network, so performance wont be great. >>>> The >>>> machine is also 8 years old, so don't expect miracles from it! >>>> >>>> It is running on Solaris 10 update 7, in a zone, so nobody can't bring >>>> down my >>>> system, even if someone manages to hack it and get root access. >>>> >>>> (Zones are quite different to VirtualBox. They run the same operating >>>> system, as >>>> the host, and share many files. But their overhead is very small. About 40 >>>> MB >>>> RAM and even dozens of zones will use < 1% CPU time on a fast machine. >>>> VirtualBox does not support the SPARC processor, whereas Zones run on >>>> SPARC too). >>>> >>>> >>>> I've limited this zone to one 1200 MHz CPU, 6 GB RAM and 4 GB swap. >>>> >>>> http://213.78.42.15:8000 >>>> >>>> I'd just be interested if it functional. >>> >>> Not for me. I got an "internal error" of some type. >>> I could not create worksheets or upload sws files >>> (though the sws files I tested were from 4.3.rc0) >> OK, I investigated this best I could. >> >> I can see on the console for this Solaris zone: >> >> Dec 23 02:40:30 t2nb tmpfs: WARNING: /etc/svc/volatile: File system full, >> swap >> space limit exceeded. >> >> So something caused the Solaris zone to use up more the 3 GB swap I'd >> limited it >> to. Given I'd allocated the zone 6 GB of physical RAM, that's a lot of >> resources >> being used! There's plenty of machines sold today with less than 6 GB RAM. > > That was me, since you specifically asked somebody to try to use up > all RAM. I did this right when David was trying to upload worksheets.
OK, that explains it. > This was by using the matrix(ZZ,10000) command (or something like > that). > You might recall that I specifically said in this thread that I was doing so. I did not notice that, but doing so was fine. Anything one can do to break it is useful. Perhaps an interesting worksheet would be one which shows a graph(s) of recent CPU/RAM/swap/disk ... usage. A bit like this, but without the entry level pricing of $300/month http://www.logicmonitor.com/logicmonitor-hosted-monitoring-service/server-monitoring/linuxunix-server-monitoring/?gclid=CN2A4smX7Z4CFY2Y2AodzlVaYg Dave -- To post to this group, send an email to [email protected] To unsubscribe from this group, send an email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
