-48 4 * * * psql syj syj -c "VACUUM ANALYZE users"
-48 4 * * * psql syj syj -c "VACUUM ANALYZE paths"
-48 4 * * * psql syj syj -c "VACUUM ANALYZE pending_actions"
+48 4 * * * psql syj syj -c "VACUUM ANALYZE users" > /dev/null
+48 4 * * * psql syj syj -c "VACUUM ANALYZE paths" > /dev/null
+48 4 * * * psql syj syj -c "VACUUM ANALYZE pending_actions" > /dev/null
+# every day, clear lighttpd compress cache
+12 5 * * * find /data/work/syj/lighttpd/lighttpd-cache -type f -mtime +2 | xargs -r rm
+# every day, database backup
+12 16 * * * pg_dump -t paths -t paths_id_seq -t pending_actions -t pending_actions_id_seq -t users -t users_id_seq | gzip > /data/project/syj/backups/db_$(date +'\%Y-\%m-\%d').gz