I meant - is the 4GB spread evenly across the 24 hour period (i.e., 0.167 GB per hour on any given day)? Or is the bulk of that happening at specific hours of the day?
And, when you say secondary poller - you mean an additional polling engine (not secondary server for Failover Engine) and this 4GB is traffic going to this additional polling engine (not the main SolarWinds server). Correct? The polling engine simply writes the results to the database. Read actions like Advanced Alerts and Reports are all done from the main SolarWinds server. So, this should not result in the 4GB usage. You may want to check the Syslog rules (from the Syslog Viewer) and Trap rules (from the Trap viewer) from the respective polling engines. These rules may be processed from the polling engines directly.