Ton posted how to increase the NRPE data load to 16k. But if you use Opsview in a distributed environment (got slaves) you also have to adjust NSCA for large output.
That’s quite easy. Patch and recompile nsca-2.7.2 and change the nsca binary on the master and send_nrpe on the slaves. So the now-up-to-16k check results are sent to, and recieved by, the master. Here’s the NSCA-2.7.2 16k patch containing the necessary changes to common.h.