Performance Tuning for Content Manager

258 Performance Tuning for Content Manager

9.3 Operating system tuning

This section discusses parameters you can tune on the operating system side to

potentially enhance system performance. We describe each parameter in detail,

with its default value and our recommendation for what value you should set.

9.3.1 TCP timed wait delay (TcpTimedWaitDelay)

This is a Windows NT/2000 parameter. This parameter determines the time that

must elapse before TCP can release a closed connection and reuse its

resources. This interval between closure and release is known as the

TIME_WAIT state or twice the maximum segment lifetime (2MSL) state. During

this time, reopening the connection to the client and server cost less than

establishing a new connection. Reducing the value of this entry enables TCP to

release closed connections faster, providing more resources for new

connections. Adjust this parameter if the running application requires rapid

release, creation of new connections, and there is a low throughput due to many

connections sitting in TIME_WAIT.

Default values

0xF0 (240 seconds = 4 minutes)

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 TcpTimedWaitDelay.

2. Set the value to decimal 30, which is Hex 0x0000001e, or another value.

3. Restart the system.

By using the

netstat command, you will be able to see that there are fewer

connections in TIME_WAIT.

Our recommendation

Use the minimum value of 0x1E (30 seconds) for Content Manager OLTP

applications.

Adjust this parameter if the application requires rapid release and creation of new

connections, and there is a low throughput due to many connections sitting in

TIME_WAIT.