This article explains how TCP Window Full warnings indicate a full receiver window, how to interpret Wireshark's Expert Information, locate the relevant packets, calculate bytes in flight, and use graphs to diagnose and verify the impact on transfer speed.
This article walks through a real‑world case of slow file copying between Beijing and Shanghai data centers, explains why Wireshark reports “TCP Window Full”, shows how to locate the relevant packets, calculate bytes‑in‑flight, and assess the impact on transfer speed using I/O graphs and window‑scaling analysis.
The article shares a series of JMeter demos that leverage Groovy for accessing the test context, retrieving SampleResult and previous sampler data, discusses the limited usefulness of thread scheduling via Groovy, highlights a discovered throughput discrepancy, and provides practical advice and links to related technical resources.
