MongoDB 查找查询在 200MB 以上的数据库上花费太多时间

Question

In my database there is a createdAt column. What I am trying to do is fetch all the data of a specific month given a current month and year. What would be the most fastest and efficient way to do it?

This is my code:

module.exports.fetchVotings = (year, month) => {
    return new Promise(async (resolve, reject) => {
        const days_count = new Date(year, month, 0).getDate();
        console.log(days_count);

        // get data of a month of the given year of createdAt
        let res = await mongoose.connection.db.collection('votings').find({
            "createdAt": {
                "$gte": new Date(year, month - 1, 1),
                "$lt": new Date(year, month, days_count)
            }
        }).sort({ createdAt: 1 }).toArray();

        resolve(res);
    })
}

Answer 1

in your query, you can do some things that might be helpful for you like

1. you can create an index on your collection.
2. if you using sorting on createdAt as 1 then might be you not need to sort your data.because it's already sorted.
3. you can use projection in your query to remove unnecessary data(which is not required) in the result.