Continuing from Server crashing for not so obvious reasons.
Short overview of what happened
My server (running Debian) has crashed very often.
Everything would work fine until noticable lag sets in. There are oops messages in the
dmesg logs. They do not appear to be fatal but sometimes the server simply becomes unresponsive. The management interface from the node the server runs on (it's virtualized) says that during this time [when it's unresponsive] the CPU load goes haywire.
I have talked with friend of mine (who maintains multiple servers) and he said that he is experiencing this problem as well. But only on the server running GitLab CE.
I have GitLab CE (installed from
deb https://packages.gitlab.com/gitlab/gitlab-ce/debian/ jessie main). So I tried stopping the GitLab services.
Since I stopped all GitLab processes the problem is gone. Everything running perfectly fine.
What do I do wrong? Are there some configuration traps that can crash my server without leaving a trace of information? The rcu_shed stall messages still appear but the server is not crashing anymore.