Hi list, I'm a huge nagios fan, using it about 3 years now. Need to know how to get around a problem. This is for my central nagios instance alone. (nagios 2.9 + ndomod) The problem appears to be related to the number of passive result checks being cached at CHKBUF variables. When the problem occurs, USEDCHKBUF=HIGHCHKBUF=TOTALCHKBUF=40960(40KB), then a restart would bring back Nagios to it's normal operation. Also, for diagnostic's relevancy sake, it was found that a malign script was flooding Nagios with 450 to 500 passive check results per minute. If I'm making the correct assertions, Nagios configured with command_check_interval=-1, and with LOTS of passive checks coming through nagios.cmd, there is a conjunction of factors still unknown to me that causes Nagios to hang, perhaps because of Nagios not being able to reaper services frequently enough (service_reaper_frequency=1. Could not set it to 0, though), Nagios CMD Buffers remains stable, not reaching TOTBUFs, and not increasing HIGHBUFs. As a initial troubleshooting, I've unset sleep_time variable. Could it be done to service_reaper_frequency as well or it would use default values? Well, I'm just writing this down to see if someone had the same problems regarding CHKBUFs not being consumed. Thanks you in advance, Marcel Mitsuto.