As seen on #perl6:

    <agentzh> oh, if i restrict each ./pugs instance to 100 MB RAM, only 77.25% of the test suite is in green.
    <agentzh> when assigning 800 RM, the passing rate returns to the normal level (97.09%)
    <agentzh> ulimit is so handy :)
    <moritz> ulimit++ ;-)
    <TimToady> careful, you might exceed ulimit's karma limit...
    <agentzh> lol
    <moritz> @karma ulimit
    <lambdabot> ulimit has a karma of 1
    <gaal> and then what, it'll kill itself? under some beliefs, that lowers its karma
    <moritz> what was ulimit's limit again?