Double-size INVs might not be verymeaningful – when there’s a backlog with #34628 the timing can be out of sync, acting like “send-inv, send-inv, populate-inv-queue, populate-inv-queue, send-inv”, so that the second send-inv is empty, and the third send-inv has to tranches of txs. Because populate-inv-queue targets a particular tx rate, send-inv over time should still average to the same 70tx-per-send-inv rate, even though individual send-inv’s can be two (or more) times that.
Are you able to do a rolling-average over 30s or 60s for that graph by any chance? I think that should bring the outgoing inv rates in line with each other.