just a quick comment...

sub max_processes  { 5; }
if you're trying to make this an inlined constant, you'll need to provide an empty prototype. i prefer making my constants ALL CAPS, and referring to them without a sigil. something like:

sub MAX_PROCESSES() { 5 }

and later...

$pm = Parallel::ForkManager->new(MAX_PROCESSES);

you'll find more info on this technique in perlsub.

~Particle *accelerates*

In reply to Re^3: Graceful shutdowns and Parallel::ForkManager by particle
in thread Graceful shutdowns and Parallel::ForkManager by atcroft

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