When running a SNMP based discovery on the network, scanning each host for a response is very, very slow. I suspect the normal timeout value from the server config file is being used.
As this setting is set to 10 seconds, it'll could take about 2550 second to scan a /24 network for a single SNMP check.
As we are trying to scan /16 network blocks, we are having quite an issue as it will take roughtly 180 hours complete a single scan.
If we were able to configure the timeout (preferably in ms) on the discovery rule, we could lower the amount of time it takes.