What's the base to consume the memory?

I setup three squid proxy using 8080,8888 and 9090 port.
The loading of the 8888 port should be heaviest.(Most of users use this
port)
The loading of the 8080 port should be least heavy.
But from the following status, the 8080 port proxy occupy more
memory(70M) than
the 8888 port(31M) and 9090 port(14M),
Any idea?

Best Regards
Robin

# ps aux | grep "(squid)" | more
nobody 11470 3.7 12.1 38.8M 31M ?? S 00:01:40 4:52.72
(squid)
-f /usr/local/squid.outside.8888/etc/squid.conf.8888
nobody 11342 1.6 5.6 20.9M 14M ?? S 00:01:04 0:32.69
(squid)
-f /usr/local/squid.auto.9090/etc/squid.conf.9090
root 25097 0.0 0.1 1.62M 152K ttyp1 S + 09:22:46 0:00.01
grep (sq
uid)
nobody 27490 0.0 27.5 77.4M 70M ?? S 08:00:19 0:54.14
(squid)
-f /usr/local/squid.open.8080/etc/squid.conf.8080
Received on Tue Apr 18 2000 - 19:37:13 MDT