CPU consistently at 100% on fresh moodle install

Hi,

I started a new server and ran moodle on it, but it jumped to 100% cpu usage and has been that way since. I tried rebooting the server to no avail, and also stopping the server and restarting it as was suggested in previous similar forum suggestions. Any thoughts?

Replies (5)

Have you checked what is chewing up the CPU?

Reply 1 2015-10-14

And when you say it "jumped to 100% cpu usage and has been that way since" can you give a bit more context? Did you literally just launch it and it happened straight away? A minute later? An hour later? A day later?

Also what size server is it? A Micro? If so they can be a realy pain with any software that puts significant load on for anything more than a second or 2 (literally).

Did you set a good root password? If you set a weak one then being hacked is always a possibility?

Also have you done any trouble shooting yet? I'd suggest installing something like htop (apt-get update && apt-get install htop) so you can then at least see what process(es) are chewing the CPU cycles.

Thanks for posting back

Reply 2 2015-10-29

I'm glad you got it sorted.

TBH I'm considering speaking with Alon & Liraz about removing support for Micro servers for many of our appliances as this seems to be a fairly common issue. And on face value it often appears to be a TurnKey issue when it's actually caused by the way Amazon do CPU throttling on Micro servers.

Yeah it a micro, I upgraded

Reply 3 2015-10-26

Yeah it a micro, I upgraded it to a medium, went through the exact same basic process and it's fine. I think I'll be dropping the micro usage from here.

I set a decent root password, so I don't think thats the problem.

Thanks again Jeremy, very helpful.

And a great one at that!

Reply 4 2015-11-07

I agree that it makes sense. Some appliances just won't run well on a Micro. However as you point out many would run fine if used lightly (e.g. simple testing).

Do you have any suggestions on where we might actually do this? Perhaps a pop-up on the Hub when you go to launch a Micro server?

Micro Servers are geared specifically to short, bursty use cases

Reply 5 2015-11-07

I agree Jeremy that Micro Servers should not be made available where they do not make sense but I would suggest this be documented in an up-front fashion so your clients don't see this lack of availabilty as a deficiency relative to Bitnami.

I would also suggest you consider use-cases carefully. While the mainstream use-case for some appliances are not supported well by Micro Servers, there might be a useful niche-case where it would apply.

For example...WordPress on a Micro can work for a low volume site but it would not be recommended for use on most websites.

Just a suggestion :-)