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Is there a way to signal when VM files start being used?

There used to be such a warning, it has been disabled. Notice that the upper limit for allocatable memory is rarely the amount of RAM + swap available on the machine. A first limit is set in the kernel, and a second one is set by the shell using 'limit' or 'ulimit'. Standard system tools can tell you when a process has reached this limit.

Nicolas Devillard 2002-05-03