On 11/26/2013 02:04 AM, Vincent Knight wrote:
Thanks P,
That's very useful (it probably explains the problems we were having).
Just to clarify (before I restart our server again as I have quite a few
active users on right now), would the following in a bash script do the job:
ulimit -u 100 -t 36000 -v 500000
sage notebook(interface='localhost',
directory='./sage_notebook.sagenb',port=8000, accounts=True,
timeout=1200, server_pool=['sage%d@localhost'%i for i in range(100)],
open_viewer=None)
This puts an overall limit on the parent sage process. Since you are
running using a server pool, the way I typically run the server is put a
limit on every child sage process. This needs something like the
following at the top of the SAGE_ROOT/sage file:
# Adapting to your username
if [ "${USER/sage}" != "$USER" ]; then
# put a limit per user of 1.5G; you can change the other limits too.
# 3D plots might need more than 1G iirc, otherwise for light
# computation 1-1.2G should be ok.
ulimit -u 100 -t 3600 -v 1500000
fi
Also, what is a reasonable limit on the memory, could I get away with
250000? I realise that this is asking how long a piece of string is but
just checking what is a reasonable limit for student day to day use.
If I recall correctly, every new user takes up another 800M or so of
virtual memory. So, a 4G system is a bit low if you want to have a
couple of users. If you have 100 users, then 8G is definitely too low.
You will need at least 20-25G of memory to run the server properly.
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