Hello,
I am using kamailio 4.0.

I am experimenting with module app_perl.
Actually, I am not using it, I am just loading it because it solves this problem when loading snmpstats:
/usr/lib/libnetsnmpagent.so.10: undefined symbol: boot_DynaLoader

However, before using app_perl i was seeing this:

# kamctl fifo get_statistics dialog active_dialogs
dialog:active_dialogs = 1

But with app_perl loaded, I see this:

# kamctl fifo get_statistics dialog active_dialogs
app_perl:active_dialogs = 1