Running two squid3 process, Why?

[Sachin Malave <sachinmalave@xxxxxxxxx>]

I am using squid3, After starting squid It creates two process
$sudo squid3$ps -A
It displays something like......                    .                    . 6325 ?        00:00:00 squid3 6327 ?        00:00:25 squid3 6328 ?        00:00:00 unlinkd 6367 ?       .                   .                   .
Can anybody tell me why it has created two processes?

--Regards
Sachin Malave