I have been running some performance tests on a web-farm
with two hosts, to determine if NLB is working as
expected. I have noticed some unusual behaviour during
During the test I remove one of the the hosts, observe the
load redistributing, then reconnect the host, and observe
the load balancing. I monitor the counter: Web Service >
Current Connections in Performance Monitor, for each of
the hosts in the web-farm cluster.
When I disconnect the host, the load on the connected host
increases (after a period of convergence) as expected.
When I reconnect the removed host, the load on the
existing host drops to it's original load, as expected,
but it takes about 2 - 3 minutes for the reconnected host
to take on any of the load.
Does anyone know why there is such a long delay? I have
played around with session timeouts in the ASP
configuration files (web.config), to no avail.
Any explinations would be welcome.
Thanks in Advance.