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[SLUG] identifying heavy load


my web/mail server is experiencing an unusually heavy CPU and memory load,
how can I narrow down what it is ?


-------------------------------------------------------------
  4:41pm  up 56 days,  8:29,  2 users,  load average: 2.15, 3.68, 9.29
192 processes: 187 sleeping, 5 running, 0 zombie, 0 stopped
CPU states: 60.8% user, 39.1% system,  0.0% nice,  0.0% idle
Mem:  1023120K av,  816976K used,  206144K free,       0K shrd,   53020K buff
Swap:  522104K av,  136988K used,  385116K free                  274168K
cached

  PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
 4368 apache    20   0  3356 3348  1120 R    62.7  0.3  75:48 perl
    7 root       9   0     0    0     0 SW    1.7  0.0 164:40 kscand/Normal
12670 apache     9   0  5168 5120  1564 S     1.3  0.5   0:03 perl
12640 apache     9   0  5140 5032  1556 S     0.9  0.4   0:03 perl
12526 apache     9   0  5272 5080  1552 S     0.5  0.4   0:03 perl
12700 apache     9   0  5120 5048  1368 S     0.5  0.4   0:03 perl
12912 apache    10   0  6520 6216  2132 R     0.5  0.6   0:02 perl
12924 apache     9   0  5364 5244  1568 S     0.5  0.5   0:03 perl
13283 apache    10   0  5092 4744  1564 S     0.5  0.4   0:02 perl
15371 root       9   0  1276 1276   920 S     0.5  0.1   0:01 top
15536 root      11   0  1196 1196   896 S     0.5  0.1   0:00 rc
15844 root      12   0  1140 1140   848 R     0.5  0.1   0:00 top
16000 root      16   0  1272 1272   992 R     0.5  0.1   0:00 K86nfslock
  931 root      10   0   544  520   460 S     0.3  0.0  19:48 syslogd
12422 apache     9   0  7028 6892  2204 S     0.3  0.6   0:04 perl
12628 apache    10   0  5272 5148  1544 S     0.3  0.5   0:03 perl
12638 apache    10   0  5116 5048  1356 S     0.3  0.4   0:03 perl





-- 
Voytek