I can attest / confirm what Andreas states about the merlin daemon. BTW, Andreas, I just patched our code base to contain your 0.6.7 changes and I will be posting that on Github for you and anyone else interested to check out over the weekend. Our tests so far are showing that with the Merlin NEB and daemon on a poller we lose less than 10% capacity on the poller compared to the poller without the NEB module and Merlind - our test poller is running 10k active services checks and 1k active host checks in less than 5 minutes with polling headroom to spare. - Max