Configuring TCP Sockets
When attempting to handle a large number of transactions, under a scalable load, it may be necessary to increase the size of the TCP socket pool in order to avoid running out of TCP sockets. This problem can occur because your Windows system does not free the TCP socket resources quickly enough.
| To increase the size of the socket pool by modifying the Windows Registry |
- Open the Windows Registry.
- Open
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TCPIP\Parameters and make the following changes:
Add this DWORD name
|
Set to
|
| TcpTimedWaitDelay |
Set to a low value, such as 1 (default: 30 seconds). |
| MaxUserPort |
Set to a high value, such as 32768. (default: 5000). |
- Open
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Afd\Parameters, and add the DWORD name DisableAddressSharing, set to a low value, such as 1.
|
Modifying TCP configurations in Solaris
In a Solaris environment, TCP/IP configuration changes are typically made using the "ndd" utility. The "ndd" utility can be used to 'get' (display) and 'set' (change) the TCP/IP driver configuration values.
| To increase the size of the socket pool by modifying TCP/IP configurations in Solaris |
- Enter the following to view the available set of commands:
ndd /dev/tcp \?
- Make the following modifications:
Change
|
To |
tcp_conn_req_max_q |
A higher value, such as 1024 |
tcp_time_wait_interval |
A lower value, such as 60000 or lower (the default is 240000) |
tcp_fin_wait_2_flush_interval |
A lower value, such as 67500 or lower (the default is 675000) |
|
