Hi there, I use nginx as reverse proxy with caching. At a test I can see 25Mbps steady inflow (nginx downloads from the origin) and 10Mbps outflow (nginx streams to the test client). I have default 8x4096 bytes of proxy buffers (any attempts to tune it yielded lower bitrates). So nginx needs to accumulate 25-10=15Mbps locally, and I assume this is happening in the temp file that will becomeby psvz - Other discussion