Comment 2 for bug 717345

I ran hammer_ssh against qastaging from devpad. Using these options:
$ python ~/hammer_ssh.py --load=200 --delay-after-spawn=0 --run-time=60 --server=bazaar.qastaging.launchpad.net

That attempts to spawn up to 200 concurrent processes all trying to run "echo hello | ssh bazaar.qastaging.launchpad.net" and when ones disconnect, it spawns another one for 60 seconds. The result was:

Spawned 1791 connections in 66.106s
average time: 6.893s

1791 connections in 66.1s means we started 27 connections per second. Since the average run time was 6.9s, that means we averaged 27*6.9=187 concurrent connections.

Not all of these would have had active bzr+ssh processes at the same time. However, it does show that we can spawn thousands of connections over time, and it doesn't appear to be leaking any file handles.