> First, install the perl module BSD::Resource > > yum install perl-BSD-Resource > > Then use it in your program like: > > #!/usr/bin/perl > > use BSD::Resource; > setrlimit(RLIMIT_VMEM, 1_000_000, 1_000_000); > > # rest of the program that is limited to 1MByte now Thanks, Paul. I knew I'd find an answer if I posted my question here.