All looking good so far and pretty typical. When looking at the TCP handshake from the PS4 I can see that it’s using an initial Window Size of 8192 (Bytes) and a Scaling Value of 6 (multiply by 64).The PS4 is (at least in some cases) using an incredibly small Receive Window which causes the download servers to have to spend a lot of time waiting, rather than sending more data.ĭuring my testing, I was downloading for a server approximately 22ms away, so as a rough guide, the BDP calculation would indicate that I would need to be advertising a receive window of approximately 540KB in order to fully utilize my available bandwidth. Do note, however, that his post is highly technical but there’s also a simplified explanation below for those who are curious. First, here’s what MrRiddell thinks happens after he carried out extensive tests: If you have a good internet connection but still sometimes run into the issue of slow downloads on the PlayStation 4, this explanation by one tech-savvy Reddit user, MrRiddell, might be of interest to you.
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