If you want to see a statistic that NPM does not support out of the box, you can use the Manage Pollers feature in Device Studio or the Universal Device Pollers (UnDP) feature to collect the statistics you want from the device. Both features allow you to create custom monitors for almost any statistic provided by SNMP based on its Management Information Base (MIB) and object identifier (OID). You can also assign the custom pollers to specific devices, view the polled data in the Orion Web Console, and use the data in alerts and reports. The difference between the two features is that Manage Pollers is a web-based interface that simplifies the creation and management of custom pollers, while UnDP is a standalone application that offers more advanced options and flexibility. Device templates and application monitor templates are not features that can be used to collect custom statistics from devices, as they are predefined sets of monitors for specific device types or applications that NPM supports out of the box. References:
Define a custom statistic to monitor in the NPM
Manage pollers using Device Studio
[Monitor custom statistics based on OIDs with Universal Device Pollers]

SNMP traps are unsolicited messages sent by network devices to report events or issues. If NPM receives too many traps from devices that are not managed by NPM, or traps that are not relevant for monitoring, the performance of the Orion Web Console can be affected. To resolve this issue, you can point the devices to a trap manager, such as Kiwi Syslog Server, and configure it to filter out unwanted traps before forwarding the remaining ones to the Orion Platform. This way, NPM will only process the traps that are important for monitoring and alerting, and reduce the load on the database and web server. References: Configure SNMP traps in NPM, Filter traps in Kiwi Syslog Server, [Forward traps to another host in Kiwi Syslog Server]