mysql大量刪除避免主從延時執行腳本

import MySQLdb
import time
from DBUtils.PooledDB import PooledDB

db_host="ali-trade-01.mysql.rds.aliyuncs.com"
db_name='storemisc'
sql='''delete from logistics_info_logs where create_time >= '2019-03-01' and create_time < '2019-05-01' limit 3000'''
try:
   out_pool = PooledDB(MySQLdb, 5, host=db_host, user='admin', passwd='123456', db=db_name, port=3306)
   out_db = out_pool.connection()
   out_cursor = out_db.cursor()
   recoder_num=1
   while recoder_num>0:
      out_db.begin()
      recoder_num=out_cursor.execute(sql)
      recoder_num=int(recoder_num)
      out_db.commit()
      print recoder_num
      time.sleep(20)
except MySQLdb.Error as e:
   ok_msg="Error %d: %s" % (e.args[0], e.args[1])
   print ok_msg

對執行時間沒有要求的可以用以上腳本，如果想要又快速又不產生延時的話，後期可以修改成多線程執行，並主動去檢查主從延時的時間和相關指標，如果大於設定的閾值，則暫停或減少線程執行