In this example, we report perilously high load averages.
The LoadAverageEmergency script might send an alert message like the following:
-------------------------------------------------------------------------------
PIKT ALERT
Tue Feb 26 16:54:09 2002
murmansk
EMERGENCY:
LoadAverageEmergency
Report perilously high system load averages
4:54pm up 13 min, 0 users, load average: 131.92, 99.22, 50.60
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 1.4 0.0 1020 460 ? S 16:40 0:11 init [2]
...
www-data 269 1.9 0.6 8548 6140 ? R 16:41 0:14 /usr/sbin/apache
mysql 271 0.0 0.8 33764 8608 ? S 16:41 0:00 /usr/sbin/mysqld
...
-------------------------------------------------------------------------------
The script follows.
///////////////////////////////////////////////////////////////////////////////
//
// process_alarms.cfg
//
///////////////////////////////////////////////////////////////////////////////
[other alarms omitted...]
///////////////////////////////////////////////////////////////////////////////
LoadAverageEmergency
init
status active
level emergency
task "Report perilously high system load averages"
input proc "=uptime"
dat $a1 $-2
dat $a5 $-1
dat $a15 $
rule
set #la1 = #value($chop($a1,1))
rule
#if perf | mus | warsaw | moscow
if #la1 > 15.0
#else
if #la1 > 10.0
#endif
output mail $trim($inline)
=toptop(20)
endif
///////////////////////////////////////////////////////////////////////////////
[other alarms omitted...]
///////////////////////////////////////////////////////////////////////////////
This is just one program example. You could add rules, or write new scripts, for example to: report and possibly kill runaway processes, report unusually high counts of per-user processes, report and possibly kill forbidden processes, report extremely high numbers of zombie and defunct processes, log special process accounting data, etc.
[For more examples, see Samples.]
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