I'm migrating from "Squid 2.5.STABLE3" to "Squid 2.7.STABLE3" but I noted this point: SQUID 2.5 There are 2 squid processes which run both as squid user: squid 11959 1 6 May25 ? 15:44:49 (squid) -D squid 12022 11959 0 May25 ? 00:01:38 (unlinkd) This is a part of my squid.conf: #cache_effective_user squid #cache_effective_group squid SQUID 2.7 There are 2 squid processes which run one as root user and other as squid user: root 3617 1 0 Jun03 ? 00:00:00 /usr/sbin/squid -D -YC proxy 3621 3617 0 Jun03 ? 00:00:01 (squid) -D -YC This is a part of my squid.conf: # cache_effective_user proxy # cache_effective_group proxy 1- In squid 2.7, can I start both processes as squid user ? 2- What behaviour is't suggested ? 2 processes which run as squid user (Squid 2.5) or 2 processes as root+squid users (Squid 2.7) ?