On 18-06-2012 19:32, Vincent Baines wrote:

Have been looking on and off at a problem I've seen for a while now, without massive success. I see intermittant 'white gaps' occuring in xymon results across a number of services, and sometimes at corresponding times, but sometimes not. Most frequently I see this gap for CPU load, and this isn't just specific to one server.

Make sure you're on the latest Xymon version (4.3.7 currently, 4.3.8 in a few days).

If that is already the case, then check the I/O load on your system (vmstat or iostat) - if the disk load is too high, xymond_rrd will drop messages. Should say so in your logs, though.

Regards, Henrik