> "Under load" really means uploading (especially)
In retrospect the industry really got shot in the foot on this ISP bandwidth race. ISP marketing kept going for bigger and bigger numbers but marketing only needs one big number (download speed) to sell subscriptions and so upload speed was de-prioritized leaving us with these wildly asymmetric connections (standard around here is 300/10), but if the upload is saturated (easy to do) the TCP Acknowledge packets can’t make it out and the whole connection grinds to a halt.
In retrospect the industry really got shot in the foot on this ISP bandwidth race. ISP marketing kept going for bigger and bigger numbers but marketing only needs one big number (download speed) to sell subscriptions and so upload speed was de-prioritized leaving us with these wildly asymmetric connections (standard around here is 300/10), but if the upload is saturated (easy to do) the TCP Acknowledge packets can’t make it out and the whole connection grinds to a halt.