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[suse-oracle] A LOT of TIME_WAIT connections

Silviu Marin-Caea

2006-02-23


I have noticed a lot of connections in TIME_WAIT status. I suspect that the
network cards don't match well with the gigabit switch.

node1-cluster1:~ # netstat -an | grep TIME_WAIT | wc -l
1724
node1-cluster1:~ # netstat -an | grep TIME_WAIT | wc -l
1607

Examples (on node1)

192.168.1.223 is the public address of node1. 7782 is the http port of
Apache. Why are there connections from itself to itself?
tcp     0    0 192.168.1.223:7782    192.168.1.223:8479    TIME_WAIT
tcp     0    0 192.168.1.223:7782    192.168.1.223:8223    TIME_WAIT
tcp     0    0 192.168.1.223:7782    192.168.1.223:7711    TIME_WAIT
tcp     0    0 192.168.1.223:7782    192.168.1.223:8732    TIME_WAIT
tcp     0    0 192.168.1.223:7782    192.168.1.223:7196    TIME_WAIT
tcp     0    0 192.168.1.223:7782    192.168.1.223:7708    TIME_WAIT

The same, but in the other direction:
tcp     0    0 192.168.1.223:8265    192.168.1.223:7782    TIME_WAIT
tcp     0    0 192.168.1.223:8214    192.168.1.223:7782    TIME_WAIT
tcp     0    0 192.168.1.223:8251    192.168.1.223:7782    TIME_WAIT
tcp     0    0 192.168.1.223:8384    192.168.1.223:7782    TIME_WAIT
tcp     0    0 192.168.1.223:8391    192.168.1.223:7782    TIME_WAIT
tcp     0    0 192.168.1.223:8437    192.168.1.223:7782    TIME_WAIT
tcp     0    0 192.168.1.223:8439    192.168.1.223:7782    TIME_WAIT


7780 is the webcache port. These look normal, except, why are they TIME_WAIT
instead of ESTABLISHED?
tcp     0    0 192.168.1.223:7782    10.1.8.16:2331       TIME_WAIT
tcp     0    0 192.168.1.223:7780    192.168.1.49:2201     TIME_WAIT
tcp     0    0 192.168.1.223:7780    192.168.1.49:2201     TIME_WAIT
tcp     0    0 192.168.1.223:7780    192.168.1.49:2200     TIME_WAIT
tcp     0    0 192.168.1.223:7780    192.168.150.186:4219   TIME_WAIT
tcp     0    0 192.168.1.223:7780    192.168.1.49:2199     TIME_WAIT
tcp     0    0 192.168.1.223:7780    192.168.6.14:3247     TIME_WAIT
tcp     0    0 192.168.1.223:7780    192.168.6.14:3244     TIME_WAIT
tcp     0    0 192.168.1.223:7780    192.168.6.14:3244     TIME_WAIT
tcp     0    0 192.168.1.223:7780    10.1.8.16:2325       TIME_WAIT

192.168.1.224 is the address of node2. 7782 is the http port.
tcp     0    0 192.168.1.223:10631   192.168.1.224:7782    TIME_WAIT
tcp     0    0 192.168.1.223:10654   192.168.1.224:7782    TIME_WAIT
tcp     0    0 192.168.1.223:10647   192.168.1.224:7782    TIME_WAIT
tcp     0    0 192.168.1.223:10643   192.168.1.224:7782    TIME_WAIT
tcp     0    0 192.168.1.223:10365   192.168.1.224:7782    TIME_WAIT
tcp     0    0 192.168.1.223:10354   192.168.1.224:7782    TIME_WAIT
tcp     0    0 192.168.1.223:10643   192.168.1.224:7782    TIME_WAIT
tcp     0    0 192.168.1.223:10365   192.168.1.224:7782    TIME_WAIT
tcp     0    0 192.168.1.223:10354   192.168.1.224:7782    TIME_WAIT
tcp     0    0 192.168.1.223:10323   192.168.1.224:7782    TIME_WAIT


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