How a little bit of TCP knowledge is essential

Re:How a little bit of TCP knowledge is essential by jvns on Saturday November 21, 2015 @06:03PM (#10608392)

One thing that confuses me is -- are ACK delays part of the default TCP implementation on Linux? I originally assumed this was some kind of edge case / unusual behavior.

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Re:How a little bit of TCP knowledge is essential by andreyf on Saturday November 21, 2015 @08:44PM (#10608736)

So it would appear, according to the man pages: http://linux.die.net/man/7/tcp

In quickack mode, acks are sent immediately, rather than delayed if needed in accordance to normal TCP operation.

So "normal TCP operation" is to delay ACKs "if needed". Not sure if "needed" is the right word to use, but whatever.

Looks like RHEL has a system-wide fix: https://access.redhat.com/documentation/en-US/Red_Hat_Enterp...

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Re:How a little bit of TCP knowledge is essential by sourcesmith on Wednesday December 02, 2015 @05:17AM (#10662061)

There is also "ip route change ROUTE quickack 1"

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