Marc Powell wrote: > >> -----Original Message----- >> From: [EMAIL PROTECTED] [mailto:nagios-users- >> [EMAIL PROTECTED] On Behalf Of Giulio Botto >> Sent: Friday, February 15, 2008 9:54 AM >> To: nagios-users@lists.sourceforge.net >> Subject: Re: [Nagios-users] NSCA problem >> >> Marc Powell wrote: > >>> This is all good. You don't have a lot of services at all. How >>> frequently are you sending results? On my own systems I'm easily >>> processing at least 13 results/sec. I know that there are others > doing >>> more but there is some point at which nagios can't keep up. >> The problem we have seems to lay in the number of nsca daemons on >> the master machine. > > The number would increase if the NSCA daemons were unable to write to > the external command pipe. That could be because the results are coming > in faster than nagios is processing them. The command pipe is only going > to hold about 4K of data then block until it's cleared.
If I read the docs correctly external_command_buffer_slots=4096 hold 4096 commands in the queue before it starts blocking. That's the value we have at the moment. >> Also I do not understand why running nsca with the --single option >> only processes the first message it receives and discards the rest. > > Nor do I. I run with -s and haven't experienced that problem. Running > nsca-2.1 here. Have you tried putting nsca into debug mode and > monitoring that? Running strace on the process would be informative as > well. Will do over the weekend: it's something we still haven't had time to do. > I did have a similar problem years ago on a machine with a failing disk. > The failures seemed harmless but ended up causing regular backlogs of > NSCA processes as you indicate. Fixing the disk problem resolved the > issue. That's why I asked. I see how this could cause problems especially since the server is also a mail content filter, but disks are hardware RAID5 on a Dell Perc controller monitored by Nagios and they appear fine. Thanks, -- Giulio Botto -- [EMAIL PROTECTED] PGP fingerprint = 1979 A78A 8F82 DB5E 55E9 D6D6 6AB6 0BA9 FDB7 6789 ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null
