httpd crashes, all websites offline

[elcanet_michael]

Hi,

On a DA server at our place, several times a week the httpd is running full/crashes causing all present websites to go offline. After a service restart of httpd, everything comes back online within +/- 1 minute. httpd can reach up to 5GB or more.

Rebuilding and/or reinstalling does not help, this has been tried several times. Our suspicion lies with a corrupt website oid, but at the same time I wonder, if that (one website being corrupt) can cause this problem.

Any ideas?

Best regards, Michael

 

[Zhenyapan]

Better to check it in logs while it fresh, maybe OMMkiller, maybe "ulimits", maybe open file limits for service. There can be a lot of reasons.

 

[Ohm J]

one account could make your server freeze, if you not limit their resource usage like... memory

 

[elcanet_michael]

Thanks for the reactions. Is there a simple way to monitor memory usage for each domain or even better is there a way of checking which domain causes the problem itself? Or just checking the logs while working until it crashes...

 

[zEitEr]

s there a simple way to monitor memory usage for each domain

DirectAdmin does not offer it, unless you host each domain under a separate user account.

Almost sure, a source of the crash can be identified through system and webserver logs.

 

[Active8]

Or monitor it with TOP or HTOP (my favourite) , I assume here you have SSH access
TOP/HTOP can give you an realtime cpu/memory/process resources used by users that gives you an idea who is the big spender on your server

 

[Ohm J]

Directadmin only has "Resource Limits", it's per user usage monitor.

 

[DanielP]

if you use Propack setup memory limits per user account and place

Also you can get useful data about usage per user in GUI from netdata plugin

da build netdata

 

[elcanet_michael]

Thanks all.

I'll monitor first and dig in to where the problem is coming from or even better which user causes the problem...

Netdata is just installed