I think you need to limit your join messages. As far as I understand your code, your bot will try to join all channels, and only after that post the message and part the channel.

Also, your sequence flow seems odd, because in the else branch, you set $data_entry->notified('true'), which seems odd.

I would try looking at either the following batched sequence:

    $irc->yield(join => $msg_channel);
    $irc->yield(privmsg => $msg_channel, $message);
    $irc->yield(part => $msg_channel);
[download]

... or a sequence that keeps track of all channels and their state:

my @channels_to_notify = get_unused_channels();
my @joined_channels;
my @notified_channels;

# in a timer, every minute or so:
while(@channels_to_notify) {
    if( @joined_channels < 100 ) {
       my $name = shift @channels_to_notify;
       join_channel( $name );
    };
};

# This should trigger on the message when you(r bot) joins a channel
sub on_join {
    my ($name) = @_;
    $irc->yield(privmsg => $msg_channel, $message);
    $irc->yield(part => $msg_channel);
};

# This should trigger on the message when you(r bot) parts a channel
sub on_part {
    my ($name) = @_;
    @joined_channels = grep { $_ ne $name } @joined_channels;
};
[download]