Slow SSH keystroke latency over wifi, but loading the network improves it temporarily

0

I have this behavior I see sometimes with the new router I've installed in my house.

an SSH connection to a LAN Linux server is sluggish and slow, but if I run an iperf test between the machines, the connection is snappy again.

iperf also reports an adequate speed of >50Mbps (nowhere near the reported link speed of 144Mbit on the laptop, but whatever) and ping is a fairly consistent 1.5ms.

So it seems like some overly aggressive power-saving or other scheme is interfering.

How could I go about debugging this?

Steven Lu

Posted 2016-08-15T05:41:14.350

Reputation: 2 818

What does top look like when you are connected to the server? Can you take a Wireshark/tcpdump (preferably from client and server) which captures the slowness and upload it somewhere? – Mark Riddell – 2016-08-15T06:56:38.823

good tip on wireshark. The issue has completely disappeared today. No doubt it will return another time. – Steven Lu – 2016-08-15T23:44:43.627

No answers

Asked: 2016-08-15T05:41:14.350

Viewed: 574 times

Active: 2016-08-15T12:56:27.570