Throughput ceilings in overnight warehouse syncs
Nightly warehouse syncs fail quietly: no customer is clicking, yet morning pick lists are wrong. Throughput reviews for these jobs watch message depth, disk saturation, and retry storms rather than only CPU charts.
In one Ulsan-adjacent logistics case, most elapsed time lived in broker retries after a volume class could not keep up with write bursts. Facilities changed the volume; application owners shortened the retry loop. The sync finished before shift change for the observation window that followed.
If your batch window is sliding later each month, measure the path during the job — not during idle afternoon hours.