WebLogic Server Performance and Tuning

WebLogic Server Performance and Tuning

 

http://docs.oracle.com/cd/E13222_01/wls/docs90/perform/WLSTuning.html

 

 

关于 Tuning Connection Backlog Buffering

You can tune the number of connection requests that a WebLogic Server instance will accept before refusing additional requests. TheAccept Backlog parameter specifies how many Transmission Control Protocol (TCP) connections can be buffered in a wait queue. This fixed-size queue is populated with requests for connections that the TCP stack has received, but the application has not accepted yet.

You can tune the number of connection requests that a WebLogic Server instance will accept before refusing additional requests. For more information on TCP tuning, seeBasic OS Tuning Concepts.

If you have not already done so, in the Change Center of the Administration Console, clickLock & Edit.
In the left pane of the console, expand Environment > Servers.
On the Summary of Servers page, select the server instance for which you will configure connection backlog buffering.
Expand the Configuration > Tuning tab.
Modify the Accept Backlog value as necessary to tune the number of TCP connections the server instance can buffer in the wait queue.

• If many connections are dropped or refused at the client, and no other error messages are on the server, theAccept Backlog value might be set too low.
• If you are getting "connection refused" messages when you try to access WebLogic Server, raise theAccept Backlog value from the default by 25 percent. Continue increasing the value by 25 percent until the messages cease to appear.
• The default value is 50 and the maximum value is operating system dependent.

To activate these changes, in the Change Center of the Administration Console, clickActivate Changes. Not all changes take effect immediately—some require a restart.