On every dedicated box I keep a swap partition with an alert raised when its used beyond a certain threshold. For all VMS no-swap because as far as they are con

On every dedicated box I keep a swap partition with an alert raised when its used beyond a certain threshold. For all VMS no-swap because as far as they are concerned disk = network. Then again anything above 80% memory utilisation and we begin looking at adding another box to the cluster due to the fact that occasional spikes in usage can easily put us beyond what swap can protect from and that just causes a shit storm.