Cpanel Fails with too many users

[Droogan]

I have a problem where if 20+ clients are all using cpanel at the same time it will fail, and I need to wait five minutes for it to automagically restart. We are using cpanel in an instructional environment.

If < 5 people use it I am fine.

I have searched for information about tweaking to improve performance but I cannot seem to get this to stop.

I have done updates to the latest Cpanel.

 

[kieranmullen]

What are your server specs? OS Type/Version Hardware Cpanel Version?

Missing too much info...

 

[Droogan]

Dual AMD Opteron CPU, only about 10 actual low volume webpages. 1 gig of ram. CentOs. Server is virtual private (so other users are present), but CPU and Memory loads are below 20% when the crash happens. I am certain we are not overloading the server.

I was (and am failing at) using it as a training server to show people how to use cpanel. In that regard I have 20 students who all need to run cpanel logins each day for one hour.

What can I do?

 

[jayh38]

Theres probably not much you can do on a VPS.. You are still at the mercy of the
node that your vps is on.

The best move would be an economical dedicated server or find a good host with
a whm. You would have more share resources that way.

 

[jayh38]

Sure, except that as far as I can tell no resources are being redlined during this occurence (cpu or memory). We aren't having bandwidth issues either. The server continues to work serving out webpages with not delays or hics or starts. Only cpanel is crashing.

What is the typical load of one cpanel login anyways? I just can't see it being extremely intensive.

cPanel does use up a lot of resources. Your provider may be restricting other settings
or processes as well, so that is hard to say. I also sent you a PM.

 

[Droogan]

Sure, except that as far as I can tell no resources are being redlined during this occurence (cpu or memory). We aren't having bandwidth issues either. The server continues to work serving out webpages with not delays or hics or starts. Only cpanel is crashing.

What is the typical load of one cpanel login anyways? I just can't see it being extremely intensive.

 

[vwiley1]

If your on a Virtuzzo VPS go to

http://main.ip.address:4643/

enter root for the username and enter your root password. Then check out your QoS Alerts... If you see Black Zones and Yellow zones...it means your hitting your limits or coming extremely close.

Black = Limit Reached

 

[WEB-PROS]

You could be hitting the limit of maxium proccess you can run at once.