Comment 3 for bug 423804

I also wanted to mention that the 'dips' that are shown there are specifically in the transition from signatures+revisions+inventories => the first chk_bytes pages => the second chk_bytes pages => texts.

I did test get_stream() against launchpad, and this is what I saw.

Note that the peak here is about 3x that of streaming from babune (so we are hitting the bandwidth cap on my system).

The major gaps are at the same point, though here the downtime is greater. I wonder if we are hitting CPU limits on launchpad server side. I also don't have any idea of launchpad code hosting's current load, or whether there are other limiting factors between here and launchpad.

What is also very strange is the 'ramp up' that is seen repeatedly. Where you get a severe drop, followed by a fast ramp, slow ramp, fast ramp, peak and then dropoff again.

I'm also not sure what bzr version launchpad is running, I'm fairly confident that I'm connecting to bzr-2.0.2 on Babune.

So it *could* be that just saturating my ISP's bandwidth because LP has so much more capacity, is causing all sorts of networking craziness. I'd like to test streaming from LP to babune, since that is a much lower latency connection, but I don't know how I would grab a graph of the bandwidth there.