Change the line to $MAX_THREADS = 100;!? As this answer is more than trivial, what are you really asking ? Could you rephrase your question?

UPDATE: Got it. You want to know how to limit the total number of threads run in one session

First of all, if you post something here on perlmonks, use <code> and </code> to enclose your code, it is really hard to read without indentation

You might just change the thread creation loop to this:

my $LIFETIME_THREADS=100;
while (! $TERM) {
  for (my $needed = $MAX_THREADS - threads->list();
          $needed && ! $TERM;
          $needed--) {
    # New thread
    threads->create('worker', $queue, $TIMEOUT) if ($LIFETIME_THREADS-
+- >0);
    exit(0) if (threads->list()==0);
  }
  # Wait for any threads to finish
  sleep(1);
}

[download]

2ND UPDATE: As AnonMonk observed, the loop runs through even after $LIFETIME_THREADS reaches 0, so $LIFETIME_THREADS gets negative. Testing for 0 isn't enough here. Corrected now.

In reply to Re: how to limit maximum threads in cpan example boss.pl by jethro
in thread how to limit maximum threads in cpan example boss.pl by franc1967

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