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WEBSPHERE PORTAL V6.1 TUNING GUIDE
L I N U X
NETW ORK T UNING
For Red Hat Linux and z/Linux (Suse Linux on zOS), we add the following settings to file
/etc/sysctl.conf, then run the command: sysctl -p
To inspect current TCP parameters, run the command: sysctl -a | fgrep tcp
Table 12: Linux Network Settings
Parameter Value
net.ipv4.ip_forward 0
net.ipv4.conf.default.rp_filter 1
net.ipv4.conf.default.accept_source_route 0
net.core.rmem_max 16777216
net.core.wmem_max 16777216
net.ipv4.tcp_rmem 4096 87380 16777216
net.ipv4.tcp_wmem 4096 65536 16777216
net.ipv4.tcp_fin_timeout 30
net.core.netdev_max_backlog 3000
net.core.somaxconn 10000
net.ipv4.tcp_keepalive_intvl 15
net.ipv4.tcp_keepalive_probes 5
W I N D O W S 2 0 0 3
NETW ORK T UNING
Use the regedit command, the following registry settings were made in the section
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\
Tcpip\Parameters. Create a new REG_DWORD named below.
Table 13: Windows Network Settings
Parameter Value
MaxFreeTcbs dword:00011940
MaxHashTableSize dword:0000ffff
MaxUserPort dword:0000fffe
TcpTimedWaitDelay dword:0000001e
TcpWindowSize dword:0000ffff (65535)