HP-UX 11i v3 Read Before Installing or Updating, September 2007 (Update 1 Release)

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Cold Install Slow or Fails with 1.5 GB or Less of RAM
Cold installs on systems with 1.5 GB or less of RAM may
take very long to complete, or may fail with an ERROR.
The minimum amount of supported memory on HP-UX 11i
v3 is 1.5 GB and is intended only to be used with the
Foundation OE and minimal applications. Installing all
the OE Recommended applications, or other OEs, may
require more than 1.5 GB of memory. If your system is
affected by this problem the install process may appear to
hang while building the kernel, or you may see the
following messages:
WARNING: It is necessary to add more swap via swapon
- use volume with at least 30 MB of free space.
ERROR: Cannot fork to run
"/var/tmp/.../preinstall". Not enough space (12).
What To Do
Add additional memory so that your system has at least 2
GB of RAM, or install only the Foundation OE with as few
additional applications as possible. If the kernel build
appears to be hung, it will eventually complete, but this
may take several hours.