[LON-CAPA-admin] Max "simultaneous" logins?

[Gerd Kortemeyer]

Hi Todd,

There is no hard limit on simultaneous logins.

Regarding server load, please check out

http://www.lon-capa.org/userload.html

- that is a very comparable machine to yours, only that it uses a 
separate library server. At 120 simultaneous logins, it has a load of 
1.4, which is far less than what we would consider 100 percent.

If you could let me know the exact days and times that this happened, I 
can have a look at the logs on the monitoring server to see what the 
actual load on your machine was.

The logs you might want to analyze on your machine are

  /home/httpd/perl/logs/lonnet.log
  /home/httpd/perl/logs/lond.log

to see what might have happened.

- Gerd.


On Feb 26, 2004, at 10:42 PM, Todd Ruskell wrote:

> Hi,
>
> Are there any benchmarks regarding how many "simultaneous" logins a
> server should be able to deal with?  We've got a class where 
> essentially
> 3 rounds of 30 students each log in to loncapa and do the same quick
> problem or two, all within about 10 minutes.  The instructor reports
> that during this time several students are able to log in, but when 
> they
> choose the course, they receive a "unable to load course map, please 
> try
> again later" message.  We have a single library server with dual 3GHz
> Xeons and 4GB ram. I've tried poking in the logs, but unfortunately 
> many
> of them don't seem to have timestamps, so I am having difficulty with
> direct correlations.
>
> Any suggestions of things to look for or try?
>
> Thanks,
>
> Todd
>
> -- 
> Dr. Todd Ruskell			
> Lecturer, Department of Physics		Office: Meyer Hall 326
> Colorado School of Mines		Phone: 303-384-2080
> 1523 Illinois Street			Fax: 303-273-3919
> Golden, CO 80401
>
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