On HP-UX, 32 bit processes can only use about 600MB of memory for data because of the HP-UX process memory layout. In theory, it's 1GB of memory for data, but I've never seen it actually happen in practice.

If you really need to load it all into memory, you'll need to use a 64 bit perl, which can be found in /opt/perl_64/bin, if the system administrator has installed the perl supplied by HP.

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