A little suggestion after search quite a while for the correct config key: In the code the config max_operations_to_track_per_service of signozspanmetrics is tracked in the variable maxNumberOfOperationsToTrackPerService In the error message "Too many operations to track, using overflow operation name" the variable name is used which makes it a bit more difficult than necessary to find the correct key due to the extra NumberOf. One still has to figure out the underscore, but it would be an improvement afaik. I assume it's just a refactoring.