no meu caso agora ficou assim:
maximum_object_size 4096 KB
maximum_object_size_in_memory 8 KB
cache_dir ufs /cache/squid 1100 16 256
cache_mem 128 MB
mas mesmo assim meu top esta alto, de uma olhada e me diga o que vc ver se estou interpretando errado:
top - 21:05:53 up 11 days, 7:28, 1 user, load average: 0.00, 0.00, 0.00
Tasks: 35 total, 1 running, 34 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0% user, 1.7% system, 0.0% nice, 98.3% idle
Mem: 507368k total, 502548k used, 4820k free, 75072k buffers
Swap: 996020k total, 0k used, 996020k free, 210604k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2833 nobody 13 0 60224 58m 1768 S 0.3 11.9 192:54.55 squid
1514 root 8 0 2064 2064 1912 S 0.0 0.4 0:00.12 smbd
1516 root 9 0 2052 2052 1900 S 0.0 0.4 0:00.00 smbd
9629 root 9 0 1724 1724 1404 S 0.0 0.3 0:00.44 sshd
1517 root 9 0 1688 1688 1100 S 0.0 0.3 1:26.93 nmbd
9632 root 9 0 1672 1672 1200 S 0.0 0.3 0:00.13 bash
1491 root 9 0 1516 1516 1260 S 0.0 0.3 0:02.04 sshd
1524 root 9 0 1192 1192 996 S 0.0 0.2 0:00.06 adsl-connect
2824 root 9 0 1160 1160 992 S 0.0 0.2 0:00.03 RunCache
9651 root 15 0 1036 1036 824 R 0.3 0.2 0:00.13 top
1552 root 9 0 972 972 804 S 0.0 0.2 0:04.00 pppd
1503 daemon 9 0 664 664 576 S 0.0 0.1 0:00.00 atd
1501 root 8 0 620 620 536 S 0.0 0.1 0:00.01 crond
62 root 9 0 596 596 516 S 0.0 0.1 0:00.35 syslogd
1506 root 9 0 516 516 468 S 0.0 0.1 0:00.00 apmd
1557 root 16 0 484 484 424 S 0.3 0.1 131:31.35 pppoe
2825 root 9 0 476 476 428 S 0.0 0.1 0:00.02 agetty
2826 root 9 0 476 476 428 S 0.0 0.1 0:00.01 agetty
2827 root 9 0 476 476 428 S 0.0 0.1 0:00.00 agetty
2828 root 9 0 476 476 428 S 0.0 0.1 0:00.01 agetty
2829 root 9 0 476 476 428 S 0.0 0.1 0:00.00 agetty
2830 root 9 0 476 476 428 S 0.0 0.1 0:00.01 agetty
65 root 9 0 448 448 396 S 0.0 0.1 0:00.04 klogd
113 root 9 0 304 304 264 S 0.0 0.1 0:00.01 udevd
2834 nobody 9 0 272 272 232 S 0.0 0.1 0:44.96 unlinkd
1 root 8 0 228 228 200 S 0.0 0.0 0:06.00 init
2 root 8 0 0 0 0 S 0.0 0.0 0:00.00 keventd
3 root 19 19 0 0 0 S 0.0 0.0 0:00.15 ksoftirqd_CPU0
4 root 9 0 0 0 0 S 0.0 0.0 0:05.63 kswapd
5 root 9 0 0 0 0 S 0.0 0.0 0:00.00 bdflush
6 root 9 0 0 0 0 S 0.0 0.0 0:00.00 kupdated
10 root -1 -20 0 0 0 S 0.0 0.0 0:00.00 mdrecoveryd
11 root 9 0 0 0 0 S 0.0 0.0 0:23.99 kjournald
36 root 9 0 0 0 0 S 0.0 0.0 0:00.00 kapmd
317 root 9 0 0 0 0 S 0.0 0.0 0:00.00 khubd