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TcpNumConnections
This parameter defines the maximum number of simultaneous TCP connections and should be set higher than the
expected number of simultaneous connections.
Recommended value: 150-200% of your expected number of concurrent users
Note: Instead of using the registry editor, you can create a text file with the extension .reg using Notepad. The
values have to be specified as hexadecimal values. These look like the following
REGEDIT4
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
"TcpTimedWaitDelay"=dword:0000001e
"MaxUserPort"=dword:00008000
"TcpNumConnections"=dword:000007d0
After you save the file, you can copy it to all servers and add the values to the registry by simply double-clicking
it in Windows Explorer.
Linux servers
Adjust the following TCP/IP parameters to tune performance in Linux:
tcp_fin_timeout
This parameter defines how many seconds to wait for a final FIN packet (state of FIN_WAIT_2) before the socket is
forcibly closed.
Under Linux, the TCP timeout can be set in /proc/sys/net/ipv4/tcp_fin_timeout. This can be done by using the
following command:
echo 30 > /proc/sys/net/ipv4/tcp_fin_timeout
A short description of this and other TCP parameters can be viewed in Linux by using the command man tcp. More
detailed information is available in the Ipsysctl tutorial at
http://ipsysctl-tutorial.frozentux.net/ipsysctl-
tutorial.html#TCPVARIABLES.
IBM AIX servers
Adjust the following TCP/IP parameters to tune performance in IBM AIX:
tcp_timewait
The tcp_timewait option is used to configure how long connections are kept in the timewait state. It is given in 15
second intervals, and the default value is 1.
Recommended value: 2 (30 seconds)
To see the current value, use this command:
no -o tcp_timewait=2
To change the value, use this command:
no -o tcp_timewait=2
A short description of this and other TCP parameters can be viewed in AIX by using the command man no.
108 IBM Lotus LMS Release 1 Installation Guide