Hello, Yesterday one of our servers went down and I can't see a reason.
I checked Logs (messages, auth, apache error.log, syslog, kernel) but I didn't find anything unusual on them.
These are the Munin charts: http://html.webporte.jp/munin.html
(Its very clear when the downtime happened)
I would like to ask your opinion on what are the possible reasons (if it is possible to guess though munin charts).
I have my personal opinion, but I want to hear from you.
Thank you in advance.
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