TCP ACK is described here: https://en.wikipedia.org/wiki/TCP_delayed_acknowledgment
I know very little about this - I just learned about it via this ticket that I filed with Node.js:
Basically I am using TCP to do IPC via localhost, but there's a big delay for each request.
This is the way to change the delay on RedHat apparently:
is there a way to change this setting on Ubuntu?
Maybe like the wikipedia article says, use the