我有一个功能，根据一定的条件更新1000多条记录。但是当我运行这个函数时 Too many connection 只有一半记录得到更新的错误。如何使用async运行这个函数？它应该一次性更新所有记录
代码：

db.query("select *, date(login) as login_date from userRegister where logout IS NULL limit 10", function (err, user) {
  if (!_.size(user))
    return
var byCatId = _.groupBy(user, 'catId');
var grouppedArray = _.map(byCatId, function(array) {
                                        return _.groupBy(array, 'login_date')
                                    });
var i, j, k
  for (i in grouppedArray) {
    if (grouppedArray.hasOwnProperty(i)) {
      for (j in grouppedArray[i]) {
        if (grouppedArray[i].hasOwnProperty(j)) {
          if (grouppedArray[i][j].length > 1) {
          for(var k=0;k<grouppedArray[i][j].length;k++){
          if(grouppedArray[i][j][k+1]){
          var updatedLogOut = moment(grouppedArray[i][j][k+1].login).subtract(1, 'minutes').format('YYYY-MM-DD HH:mm:ss')
            async.eachSeries(db.query('update userRegister set  logout= ? where userId = ? and catId = ?', [updatedLogOut, 1, grouppedArray[i][j][k].userId, grouppedArray[i][j][k].catId], function (err, updatedLogout) {
                if (err) {
                    console.log(err)
                    return err
                   }
                  if (!_.size(updatedLogout))
                                    return
                                    console.log("Updated Successfully")
                                    return updatedLogout
            })
        }
    }
    }
                }
      }
    }
  }
})