1.2: Memory Leak? Something?

Daniel Henninger daniel at unity.ncsu.edu
Tue Mar 9 18:58:44 CET 2004


Folk,

Ever since moving from Solaris to Linux for our Nagios servers, I've
noticed Nagios gradually taking up what seems like more and more memory
as it runs, to a point where it eventually shoots itself in the head.
(sort of.. it appears to "get confused" at some point)  We have two
redundant Nagios servers that failover via Heartbeat if one dies.  Often,
the manifestation of the memory run-out is is that heartbeat isn't able to
fire off it's "are you there?" to the other host, and so it turns control
over to the other server.  This is good because no one notices Nagios
upset, but I'd still like to find out what's causing it to continuously
grow in size.  We have a potentially odd configuration that may have
something to do with it.  Basically, I have a mysql database with all of
the information about our servers.  (servers are organized by a "class",
and the class determines what checks occur via Nagios for that server)
Anyway, this db is probed every 15 minutes for changes, and the nagios
config files are re-generated.  If there are differences, nagios is hup'd
to reread it's config.  Due to the number of servers we have, the
frequency in which people add or remove servers, etc, I would say that
quite a lot of hup-ing occurs.  I am pointing this out because I suspect
that has something to do with our problems.  Perhaps the rereads are
leaking memory somewhere?  Anyway, I'm not sure what else to say about it
at the moment, so if I can provide further information, please let me
know.  I haven't done real graphs or anything of the memory drainage, I'm
just going by my own observations.  If I need real data, I can certainly
begin gathering it.  Anyone else observed this behavior?  Thanks!

Daniel

-- 
/\\\----------------------------------------------------------------------///\
\ \\\      Daniel Henninger           http://www.vorpalcloud.org/        /// /
 \_\\\      North Carolina State University - Systems Programmer        ///_/
    \\\                   Information Technology <IT>                  ///
     """--------------------------------------------------------------"""


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