Network Kernel Parameters
These Parameters have been suggested by TIBCO to bring the performance of a LINUX machine to the maximum regarding the network.
We have used these tuning parameters successfully to reduce retransmissions on heavy loaded machines. You will find similar tuning tips, when searching for web-server optimization.

Parameter Red Hat Enterprise Linux Server 5.6 (Tikanga) VALUES proposal
net.core.rmem_max 131071 16777216
net.core.rmem_default 129024
net.core.wmem_max 131071 16777216
net.core.wmem_default 12902?
net.ipv4.tcp_rmem (3) 4096 4096
87380 87380
4194304 16777216
net.ipv4.tcp_wmem (3) 4096 4096
16384 65536
4194304 16777216
txqueuelen 1000 7000
net.core.netdev_max_backlog 1000 30000



Performance daten: missed/pkts und retrans/pkts are good quality parameters

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