VIRT    RES   SHR  S %CPU %MEM  TIME+
333:      5880K  7024K  piperd  0:07 0.00% 26.37%  perl
666:      7912K  9056K  piperd  0:14 95.26% 43.02%  perl
999:      9936K  11M  piperd  0:21 120.78% 54.54%  perl
1332:      12M  13M  piperd  0:28 98.42% 60.40%  perl
1665:      14M  15M  piperd  0:36 99.62% 66.50%  perl
1998:      16M  17M  piperd  0:43 89.06% 67.14%  perl
2331:      18M  19M  piperd  0:50 82.70% 66.85%  perl
2664:      20M  21M  piperd  0:58 73.58% 63.13%  perl
2997:      22M  23M  piperd  1:05 76.28% 68.26%  perl
3330:      24M  25M  piperd  1:13 79.44% 71.09%  perl
3663:      26M  27M  piperd  1:20 76.92% 72.71%  perl
3996:      27M  29M  piperd  1:28 73.27% 68.36%  perl
4329:      29M  31M  piperd  1:35 62.32% 60.45%  perl
...
8658:      55M  56M  piperd  3:19 65.26% 65.23%  perl
8991:      57M  58M  piperd  3:28 66.03% 66.02%  perl
9324:      59M  60M  piperd  3:36 67.69% 67.68%  perl

^c as I don't want to hog that old server for too long.