IBM 6.1.X manual Operating System Tuning, Parameter Value

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 NextBoot’.

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

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W E BS P HE R E P O R T AL V 6 . 1 T U N I N G G U I D E