[Mimedefang] Tracking down high memory usage

[David Nelson]

Does anyone have advice on how to track down high memory usage with MD?
I run between 10 and 25 slaves and they all consume about 25MB of memory
at startup and during mail processing.  After a while, _some_ of the
slaves (anywhere from 1 to 4) jump to about 175MB of memory (snips from
top below).

-----------

last pid: 73436;  load averages:  1.50,  1.51,  1.95
up 9+02:40:26  15:00:46
127 processes: 1 running, 126 sleeping
CPU states:  1.6% user,  0.0% nice,  7.6% system,  5.6% interrupt, 85.2%
idle
Mem: 298M Active, 687M Inact, 223M Wired, 71M Cache, 112M Buf, 729M Free
Swap: 2048M Total, 7856K Used, 2040M Free

  PID USERNAME PRI NICE   SIZE    RES STATE  C   TIME   WCPU    CPU
COMMAND
73423 defang    -8    0 23392K 22548K piperd 0   0:02 38.81%  8.59% perl
73410 defang    -8    0 23392K 22548K piperd 0   0:02 16.84%  7.13% perl
73370 defang    -8    0 23392K 22548K piperd 1   0:02  4.45%  3.17% perl
73360 defang    -8    0 23392K 22548K piperd 1   0:02  3.76%  2.83% perl

-----------

last pid: 73655;  load averages:  0.62,  1.21,  1.78
up 9+02:41:57  15:02:17
114 processes: 2 running, 112 sleeping
CPU states: 53.3% user,  0.0% nice,  1.2% system,  0.0% interrupt, 45.5%
idle
Mem: 408M Active, 686M Inact, 224M Wired, 71M Cache, 112M Buf, 619M Free
Swap: 2048M Total, 7856K Used, 2040M Free

  PID USERNAME PRI NICE   SIZE    RES STATE  C   TIME   WCPU    CPU
COMMAND
73161 defang   107    0   176M   135M CPU1   0   0:12 32.42% 32.42% perl
73611 defang    -8    0 23392K 22548K piperd 1   0:02  5.41%  3.61% perl
73180 defang    -8    0 24328K 23336K piperd 1   0:03  0.59%  0.59% perl
73527 defang    -8    0 23392K 22548K piperd 0   0:02  0.42%  0.39% perl

-----------

I've tried and tried to figure out where that much memory would be
allocated from, but I've been less than successful.

Any ideas are greatly appreciated!

Thanks!
-- Dave