postgresql不提供这样的功能，所以根据操作系统的crontab配置文件。
我的配置:
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
HOME=/
# For details see man 4 crontabs
# Example of job deFinition:
# .---------------- minute (0 - 59)
# | .------------- hour (0 - 23)
# | | .---------- day of month (1 - 31)
# | | | .------- month (1 - 12) OR jan,feb,mar,apr ...
# | | | | .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# | | | | |
# * * * * * command to be executed
30 10 * * * root /media/data/java/edu/backup.sh
backup.sh:
#!/bin/bash
echo "Starting Backup Postgresql ... "
su - postgres -c pg_dumpall > pgsql-backup.`date +%Y-%m-%d.%H:%M:%s`.dmp
tar zcvf /media/data/java/edu/pgsql-backup.`date +%Y-%m-%d`.tar.gz *.dmp
echo "Remove temp file ..."
rm -rf pgsql-backup.*.dmp
