If conky process use to die by itself, a solution is to make a script which refresh the process every 10 second for instance.

The script:

#! /bin/bash
while true; do
conkyisoff=$(ps -ef|grep -v grep|grep conky >/dev/null && echo "running" || echo "not running")
if [ $? -eq 0 ]; then
killall conky ; conky
else
sleep 10
fi
sleep 10
done
exit 0