数据库时间久了，难免会产生很多日志，Deepgreen的日志与Greenplum一样，都存在pg_log文件夹下，我们可以使用以下脚本，配合Linux定时任务，保存固定日期的日志即可：
#!/bin/bash
# filename: gp_clear.sh
# start time
start_time=$(date)
echo "-------- Start time is $start_time --------"
start_seconds=$(date +%s)
# delete log files
#find /data/gpmaster/gpseg-1/pg_log -mtime +15 -name "*.csv" -exec rm -rf {} \;
find /seg0/gpseg0/pg_log -mtime +15 -name "*.csv" -exec rm -rf {} \;
#find /seg1/gpseg1/pg_log -mtime +90 -name "*.csv" -exec rm -rf {} \;
#find /seg2/gpseg2/pg_log -mtime +90 -name "*.csv" -exec rm -rf {} \;
#find /seg3/gpseg3/pg_log -mtime +90 -name "*.csv" -exec rm -rf {} \;
# end time
end_time=$(date)
echo "-------- End time is $end_time --------"
end_seconds=$(date +%s)
diff=$((end_seconds - start_seconds))
echo "Total $diff seconds."
echo ""
echo ""执行方法，修改+15为需要保留日志的日期数，+15代表保留15天：
./gp_clear.sh 