> On Sep 7, 2022, at 12:41 PM, Jim Popovitch <j...@k4vqc.com> wrote: > > On Wed, 2022-09-07 at 12:37 -0600, Casey Deccio wrote: >> >>> On Sep 7, 2022, at 11:46 AM, Jim Popovitch <j...@k4vqc.com >>> <mailto:j...@k4vqc.com>> wrote: >>> >>> I saw some much of the verbose '15 > 14' logs that I just decided to >>> net.ipv4.tcp_window_scaling=0 and be done with it. Cleared up the >>> noise, haven't noticed any problems since. ymmv. >> >> Sounds like you've seen a non-trivial amount of this? >> >> Disabling window scaling with net.ipv4.tcp_window_scaling=0 will "fix" the >> logs, but of course, it will also disable window scaling, which means that >> you are limiting the size of your congestion window to 64KB. This >> effectively limits the throughput of TCP sessions over "long, fat pipes". > > Yep. I don't own/run/maintain anything on fat pipes, just destinations such > as webservers, email servers, and dns servers for mailinglists. If the > bandwidth for them is now capped at 2MBs, that's ok in my book. The notion > that everything needs to support 10Gb interfaces and terabyte sized hardware > is just not realistic.
Fair enough/ Just trying to interpret "ymmv" :) Cheers, Casey
