Visvanath Ratnaweera

Hi Paul

Thanks for the encouragement!


I have my test instance on a Raspberry Pi, http://www.syndrega.ch/?p=108, haven't done much of a testing though.

The 16.65% share for nginx in http://news.netcraft.com/archives/2015/10/16/october-2015-web-server-survey.html is impressive, I must say.

Hi Gary

Quote
> One thing I had been doing just before the crash was to switch back and forth several times between the Bubble and Compact theme to see if this really caused all previous lines of chat to disappear or if it was just my machine.

That is highly suspicious. The theme is part of Moodle code and it has to be clean. If possible fall back to a core theme. BTW, do you have theme designer mode ON?

> After the 4th or 5th switch in rapid succession I noticed I couldn't send a line I'd been typing and the two others reported by email they lost me and each other in chat along with access not only to Moodle but to the entire domain. And when I tried to go in remotely to the server I noticed I couldn't and a physical reboot of the server needed to be done to get going again.

That is absurd. If 10 web visitors can take down the whole bunch of servers of an institution, there is something wrong in a big way. Are all these hosted on one (physical) server? Are you sure of the hardware, device drivers? A serious stress testing is needed from the part of the system administrators.

Ken

Glad that you reminded me of the core dump. I am not sure whether it has to be in ./mod/chat/ though. Worth scanning the whole file system.

I have a problem accepting that 4 GB RAM as under-powered. I still think of how we envied the two super computers the university had, a rich university for that matter, with 4 GB RAM each! Recently I did some bench marking on a common (KVM, Qemu) VPS with 2 core and 2 GB RAM, was a huge positive surprise. Must say that I haven't tested the chat module.

One final thing: why do you say top has to run as root?

@Gary
This are some examples of the monitoring you need: https://moodle.org/mod/forum/discuss.php?d=192162.

Matt

+1 for VPS. I had a VPS as a test server never required performance. Recently I did some bench marking and positively surprised. 'course Unix commands is a requirement.

About "bucket server": Could you post some pointers? My web search took me to a "Bukkit Server for Minecraft"!

...or focus the search to:
- https://moodle.org/mod/forum/search.php?id=5&subject=video&user=Justin+Hunt
- https://moodle.org/mod/forum/search.php?id=5&subject=video&user=Matt+Bury