Troubleshooting lack of data and verbose logging

I am trying to use telegraf for collecting data from multiple SNMP sources (cameras, speakers, hosts, etc).

The only error message I get in the log file is the following:
2020-09-24T04:22:28Z D! [outputs.influxdb] Buffer fullness: 0 / 10000 metrics
2020-09-24T04:22:47Z D! [outputs.influxdb] Buffer fullness: 0 / 10000 metrics

I have enabled verbose logging in the config file with the following directives:

Log at debug level.

debug = true

Log only error level messages.

quiet = false

How to get the actual error messages?

Hello @tagsense,
It could be that the devices aren’t responding quickly and he needs to wait longer. Or it’s working fine and there is no error. Try running with --test to see any collected metrics output to stdout.

Here’s a support issue from a user starting out with the same problem (configuring multiple snmp devices and getting “buffer fullness”) and how it’s resolved. There are a couple useful tips in there, like how to use a separate snmp plugin instance per snmp device so one slow or misconfigured device doesn’t block the others, and how to use tags to keep track of data from the multiple devices.