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WEBSPHERE PORTAL V6.1 TUNING GUIDE
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
NETW ORK T UNING
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