The tracer hooks PostgreSQL's optimizer via eBPF. It captures every alternative plan path with cost estimates and flags the chosen plan.
A kernel-space eBPF program reads planner structs using DWARF-derived offsets. A user-space collector gathers the data and a visualizer renders plan graphs.
eBPF probes plus DWARF offsets surface ephemeral plan alternatives. Engineers can see the plans the optimizer considered and rejected. Less or no guessing. That changes how teams inspect optimizer behavior.
