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I've been running an LVS for quite some time on a 2.4.23 kernel with
FreeBSD realservers running Apache.
Last night I noticed that the number of active connections (via
ipvsadm) for my 4 realservers seemed very high for that time of night
(approx 500-600 http connections) . I normally only see numbers that
high during peak times.
I decided to turn off the flow to 3 of the 4 servers and noticed that
the numbers of active and inactive connections did not drop to zero as
they normally would. Instead the values hovered between 40-80 active
connections for each of the servers that had been taken offline.
I shut the server down by using 'server stop ipvsadm' and also tried
ipvsadm --clear and ipvsadm --zero. When I started the LVS back up
the number of connections were still the same and would not time
out/drop down to zero.
This AM, I checked again and all is back to normal. What would cause
the persistence of these connections?
Thanks! -Neil
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