On 17 December 2010 13:47, krad <kra...@gmail.com> wrote:
> > > On 16 December 2010 17:42, Matej Šerc <matej.s...@gmail.com> wrote: > >> Hi, >> >> I am experiencing a strange issue that has never occurred to me in all the >> years of using different versions of FreeBSD. >> >> One of our servers, which was running without any issues until yesterday, >> stopped responding for two times now - yesterday and today. About three >> days >> ago another process of pulling out SNMP data from devices was added, but I >> was looking the system load and the system was working normally and also >> processes were cmpleting successfully within the timeframe of 5 minutes >> (much faster, they completed in about 2 minutes). I also want to mention >> that those SNMP pulling processes were already working about a month or so >> on the same server (no hardware was changed in the meantime) and I am >> pretty >> sure that it should work normally as it did. >> >> My main problem is, that there is abcolutely nothing in log files - no >> errors, no warnings, nothing. No strange messages, every process just >> stops >> logging at one time and then continues after the reboot. Another >> interesting >> issue is that both hangs occured at approximately the same time, but there >> was nobody in the server room and also no one was logged into the server >> at >> that time except me. About 10 minutes before hang I was investigating >> processes and everything was very normal - no large CPU eating or memory >> eating processes. This might be interesting, even after every process >> stops >> responding, I was still able to ping the network interfaces and receive >> ICMP >> replies back. >> >> Of course my idea about it is that it must be connected to some hardware >> problems - my suggestion was to make some memory tests. But I would like >> to >> hear some your oppinions about the entire situation. Could some power >> supply >> issues be doing it? The server is about a year old and has, as I already >> mentioned, worked like a charm until now. How come there is no kernel >> panic >> since no daemon seems to be working? Why is network interface still up and >> working? >> >> I was unable to go to the co-location facility so I can't say what was on >> the screen at both times, but I suppose there was nothing else than >> messages >> I can read from log files. >> >> I know that 7.2 is pretty old version, but it was working until now on the >> same hardware and we had no reason to change that. Now the system is after >> reboot again running smoothly and without any issues at all. >> >> Thank you very much for any information regarding the issue. >> >> BR, Matej >> _______________________________________________ >> freebsd-questions@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-questions >> To unsubscribe, send any mail to " >> freebsd-questions-unsubscr...@freebsd.org" >> > > I'm not a huge fan of letting snmp spawn heavy weight scripts and processes > as it is to easy for a remote machine to effectively dos the machine. I > realise you are fairly sure the scripts arent an issue, but try croning them > every 5 minutes, and writing the results to a file. SNMP can then simply > retrieve the results from the file. This safeguard to to a certain extent, > in that it stops many processes being spawned. All you have to watch after > that is the job run time > > > Also lets stops resources being tied up on the monitoring machine, as it doent have to hang around for x minutes for the results for its query _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
