The following examples show how to create user-defined
alert type scripts to handle different alerting scenarios.
Generate an alert if file system utilization is high
The
following shell script generates a critical alert if any file system
on the database server exceeds 90 percent utilization.
df -H | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read output;
do
echo $output
usep=$(echo $output | awk '{ print $1}' | cut -d'%' -f1 )
partition=$(echo $output | awk '{ print $2 }' )
if [ $usep -ge 90 ]; then
returnValue = 2
echo "Running out of space \"$partition ($usep%)\" on $(hostname) as on $(date)"
else returnValue = 0
fi
done
exit $returnValue
Generate an alert if amount of free space in memory
is low
The following shell script generates a warning alert
if the amount of free memory space is less than 10 megabytes and a
critical alert if the free memory space is less than 5 megabytes.
if [cat /proc/meminfo | grep SwapFree | cut –d ‘:' –f2 -ge 200000]
exit 0
else if [cat /proc/meminfo | grep SwapFree | cut –d ‘:' –f2 -lt 100000]
exit 1
else if [cat /proc/meminfo | grep SwapFree | cut –d ‘:' –f2 -lt 50000]
exit 2
Generate an alert for database backup
In this
example, the SQL-only script generates a critical alert if the last
backup operation for a production database occurred at a certain date
and time.
SELECT CASE last_backup
WHEN ‘2012-01-06-22.47.42.000000' THEN 2
ELSE 0
END AS returnvalue
FROM sysibmadm.snapdb
Generate an alert for diagnostic records
In
this example, the SQL-only script generates a warning alert if the
level of 'W' (Warning) is recorded in the DB2 general diagnostic
logs, and a critical alert if the recorded level is 'E'
(Error), 'C' (Critical), or 'S' (Severe).
SELECT CASE level
WHEN ‘W' THEN 1
ELSE WHEN ‘E' OR ‘C' OR ‘S' THEN 2
ELSE 0
END AS returnvalue
FROM TABLE (PD_GET_DIAG_HIST( 'MAIN','E', '',
CAST (NULL AS TIMESTAMP), CAST (NULL AS TIMESTAMP) ) ) AS T