On AIX®, the LDR_CNTRL environment
variable controls the way AIX handles
the memory space available to programs and the page sizes used in
each segment. To provide sufficient memory allocation for WebSphere® Application Server,
you must unset this environment variable for WebSphere Application Server to
run correctly.
About this task
If your installation includes a stand-alone instance of WebSphere Application Server,
unset the LDR_CNTRL environment variable on the
computer on which WebSphere Application Server is
installed. For cluster environments, you must unset the LDR_CNTRL environment
variable on each computer where WebSphere Application Server is
installed (Deployment Manager and managed nodes). The change can be
permanently configured if appropriate for your environment.
Procedure
To
unset the LDR_CNTRL environment variable:
- Make sure all WebSphere Application Server processes
are stopped.
- Configure the LDR_CNTRL environment
variable.
Refer to your system administrator if you are
unsure about this process.
The following example shows how to unset
the LDR_CNTRL environment variable if your login
shell is /bin/bash.
- To apply the setting to all users on the system, add the following
line to the /etc/profile file:
unset LDR_CNTRL
- To apply the setting to a specific user, add the line to the ~/.profile file
for the user. The user to configure is typically root unless you reconfigured WebSphere Application Server for
non-root administration.
If you do not want to permanently configure the environment variable
as shown in the example, you can run the
unset LDR_CNTRL command
just before you start a
WebSphere Application Server process.
All
WebSphere Application Server processes
must be stopped before you run these commands.
- Start the WebSphere Application Server processes.
- In a clustered environment, repeat this procedure on all
computers where WebSphere Application Server is
installed.