Postgresql SERIALIZABLE 事务制作队列

Question

I am using typeorm with database postgresql .
The specific route, needs transactions on high-load web app:

import { Router, Request, Response } from 'express';
import { getManager } from 'typeorm';

const router = Router();

router.post('/apply', async (request: Request, response: Response) => {
    await getManager().transaction('SERIALIZABLE', async (txManager) => {
        /* Many selects, inserts here */
    });
});

But if there is two simultaneous requests, the one request will errored with the message could not serialize access due to read/write dependencies among transactions .

How to prevent this? Maybe handle every request one-by one? But I don't know how to do this. Maybe there is some other ways to do transactions, but I have read documentation and didn't find anything for this.

Answer 1

使用SERIALIZABLE隔离级别，您不能防止序列化错误，但如果发生此类错误，您将重复事务。