Siebel Performance Tuning Guide > Tuning Operating Systems for Performance >
Tuning an Apache Web Server for Applicable UNIX and Linux Platforms
Several of the Web servers supported for use with Siebel Business Applications are based on the Apache Web Server. These include Oracle HTTP Server, IBM HTTP Server, and HP Apache Web Server, which are supported on certain UNIX and Linux operating systems. This topic describes recommended parameter settings that are optimized for scalability and performance on an Apache Web Server. You can further adjust these settings at your discretion to optimize the performance of your Web server. For Web server support details, see the Certifications tab on My Oracle Support. The default setting for ThreadLimit for the Apache Web Server is 64, but this parameter can be set to a much higher number, subject to limitations from kernel settings. Related parameters include ThreadsPerChild, MaxClients, and ServerLimit. Many parameter settings are subject to available memory and other resources. High values for parameters such as MaxClients or ThreadLimit can increase memory usage. User lower values to reduce memory usage.
Related Topics
Tuning the Siebel Web Server Extension for All UNIX and Linux Platforms
Applicable Web server topics for particular operating systems
Specifying Static File Caching
To configure parameters for an Apache Web Server
- Using a text editor, set values for parameters in the worker.c section of the file
Web_server_install /conf/httpd.conf , where Web_server_install is the root directory in which your Web server is installed. Set the parameter values as shown in the following table:
ThreadLimit
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N where N is a value 1 or 1.2 times the maximum number of concurrent users (threads). The value for the applicable parameters can be set equal to or up to 1.2 times the number of concurrent users the Web server must support. The specific values to use for each applicable parameter depend on your organization's requirements. |
ServerLimit
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MaxClients divided by ThreadsPerChild |
StartServers
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1
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MaxClients
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ServerLimit multiplied by ThreadsPerChild |
MinSpareThreads
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1
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MaxSpareThreads
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N where N is a value greater than or equal to the sum of MinSpareThreads and ThreadsPerChild. |
ThreadsPerChild
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N where N is a value less than or equal to ThreadLimit. |
MaxRequestsPerChild
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0
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KeepAlive
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Consider setting this parameter to Off to prevent the Web server from providing persistent connections and to free connections for reuse. However, using this setting can incur a cost, because memory will be used to close and set up new TCP/IP connections. |
KeepAliveTimeOut
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Optionally, you can reduce the value for this parameter so that a thread is reused more quickly. |
NOTE: For HP-UX, if you are not using multiplex sessions, then make sure that the kernel parameter max_thread_proc is set to a number greater than two times N.
- In the file httpd.conf, also set the following values:
- The value for ServerName must match the name of the Web server computer on which you installed the SWSE.
- Change the values for User and Group to a valid computer user and group:
- The value for UseCanonicalName is recommended to be set to Off. It must be set to Off if you are load-balancing your Web servers.
- If you are not using the CGI functionality of the Web server, then you might want to comment out the line that loads the CGI module. Doing so will make tracking Web server processes simpler, because there will be always one child process. The line is as follows:
LoadModule cgid_module modules/mod_cgid.so
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