Yep, the Naemon core process definitely is the one that grows and is 100% reproducible for me. It grows to the max available memory on the box, then gets OOM killed. Doesn't happen when mod_gearman isn't enabled. I've seen it may also be happening with Nagios 4 as well, but haven't tested it myself. Test environment is RHEL 6u4. The valgrind log wasn't mine, but we seem to have very similar setups. <div class="gmail_quote">On May 7, 2014 10:29 AM, "Sven Nierlein" <<a href="mailto:Sven.Nierlein@consol.de">Sven.Nierlein@consol.de</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> On 07.05.2014 16:24, Jason Cook wrote: > Thanks Andreas! I believe it's disabled, but I'll make sure of it this afternoon. Would embedded perl cause an issue on the neb side though? It shouldn't, the neb module has nothing related to perl compiled in. That's worker only code. It's definitly the naemon process itself which grows? Because the valgrind log doesn't contain any serious memory leak from a quick look. Sven </blockquote></div>