buffer: add some debug logging for number of objects sent
helpful to understand if the thresholds we've set have been hit
Test Plan
ran a few git loads with this debug enabled
Migrated from D6447 (view on Phabricator)
Staging instance, all changes can be removed at any time
helpful to understand if the thresholds we've set have been hit
ran a few git loads with this debug enabled
Migrated from D6447 (view on Phabricator)