Performance Tuning for Content Manager

Chapter 9. Tuning WebSphere for Content Manager 259

9.3.2 Maximum user ports (MaxUserPort)

This is a Windows NT/2000 parameter. It determines the highest port number

TCP can assign when an application requests an available user port from the

system.

Default values

1024 - 5000 are available

How to view or set

1. Using the regedit command, access HKEY_LOCAL_MACHINE\SYSTEM\

CurrentControlSet\Services\TCPIP\Parameters and create a new

REG_DWORD named MaxUserPort.

2. Restart the system.

Our recommendation

The server might run out of ports if too many clients try to connect and this value

is not changed. Use at least decimal 32768 until 65534 (the maximum). With this,

you increase the number of possible ports to be used to connect to the Content

Manager system.

9.3.3 Number of open files permitted (ulimit)

This AIX parameter specifies the permitted number of open files. The default

setting is typically sufficient for most applications. If the value set for this

parameter is too low, a memory-allocation error is displayed.

Default value

2000

How to view or set

To set ulimit, use the following command:

ulimit -n <parameter value>

In this syntax, <parameter value> stands for the number of open files permitted.

For SMP machines, to unlimit the ulimit value, use the following command:

ulimit -unlimited

Important: These MaxUserPort and TcpTimedWaitDelay should be used

together when tuning WebSphere Application Server on a Windows NT or

Windows 2000 operating system.