thank you very much for your precious advice, and the example code. to give you an update on my code, as i've done it so far:

sub event_handler {
   my $worker_thread = sub { 
          my $row = shift;
          my $event = SOD::EventCooker->new($row);
          if (exists $p_ids{$row->{'ev_p_id'}}) {
             lock $sessions{$p_ids{$row->{'ev_p_id'}}};
             my $session = thaw sessions{$p_ids{$row->{'ev_p_id'}}};
             $event->evaluate($session->{PLAYER}->{GAMESTATS});
             $sessions{$p_ids{$row->{'ev_p_id'}}} = freeze $session;
          }
          else {
             $event->evaluate;
          }
      };

   my $dist_thread = sub { 
          my @threads;
          my $thread_time = time;
          my $dbh = DBI->connect("DBI:mysql:database=$appdata{DBBASE}"
+, $appdata{DBUSER}, $appdata{DBPASS},
          { RaiseError => 1, AutoCommit => 1 }) || die $dbh->errstr;
          my $res = $dbh->selectall_hashref("SELECT * FROM event WHERE
+ ev_time<=$thread_time", 'ev_time');
          $dbh->do("DELETE FROM event WHERE ev_time<=$thread_time"); 

          map {
              push @threads, threads->new($worker_thread->($res->{$_})
+);
          } sort keys(%$res);
          map {
             $_->detach;
          } @threads;
          $dbh->disconnect;
          undef $dbh;
      };
   
   while (1) {
      sleep 1;
      last if $tflag;
      threads->new($dist_thread)->detach;
   }   
}
[download]

i assume that a combination of our two approaches might be sufficient even for time of high traffic & loads.

---

---

• Are you posting in the right place? Check out Where do I post X? to know for sure.
• Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:

  <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>

• Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
• Want more info? How to link or How to display code and escape characters are good places to start.