Performance Tuning for Content Manager

260 Performance Tuning for Content Manager

To display the current values for all limitations on system resources, use the

following command:

ulimit -a

Our recommendation

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. This error

occurs when a cluster of four clones is run on an S80 24-way and the ulimit value

should be changed to unlimited.

See 7.3.1, “Configure appropriate ulimit” on page 157 for additional discussion

about default values for ulimit.

9.3.4 Duration of an active connection (TCP_KEEPIDLE)

The keepAlive packet ensures that a connection stays in an

active/ESTABLISHED state.

Default value

14400 milliseconds

How to view or set

Use the no command to determine the current value or to set the value. The

change takes effect immediately. The change is effective until the next time you

restart the machine. To permanently change the value, add the no command to

the /etc/rc.net directory. For example:

no -o tcp_keepidle=600

Our recommendation

600 milliseconds

9.4 Web server tuning

Tuning IBM HTTP Server increases the throughput while balancing the system

resources. WebSphere Application Server provides plug-ins for several Web

server brands and versions. Each Web server operating system combination has

specific tuning parameters that affect application performance.

IBM HTTP Server settings are set in the configuration file called httpd.conf, which

is normally located on UNIX under /usr/IBMHttpServer/conf directory, and on