IBM WEBSPHERE 6.1.X - Manual (Page 30)

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W E B S P H E R E P O R T A L V 6 . 1 T U N I N G G U I D E
Operating System Tuning
In any high-load environment, the network must be closely monitored to ensure that its
performance is acceptable and consistent. Note that, the following is not to suggest that all
network parameters are set to these values, but merely make the reader aware that the
network is also an entity in the performance environment and bottleneck resolution process.
A I X
N E T W O R K T U N I N G
Use smitty->Performance and Resource Scheduling->Tuning Kernel and Network
Parameters->Tuning Network Option Parameters->Change/Show Current Parameters to
change. These will take effect immediately, improving the network layer performance in high
volume environments.
Then remember to ‘Save current parameters for Next Boot’.
Table 11: AIX Network Settings
Parameter Value
tcp_sendspace 131072
tcp_recvspace 131072
udp_sendspace 65536
udp_recvspace 655360
somaxconn 10000
tcp_nodelayack 1
rfc1323 1