How to properly set up MySQL connection in SvelteKit?

Other Questions MySQL
1

I’m having trouble with my SvelteKit app and MySQL. Every time the connection goes idle, I get an ‘ECONNRESET’ error. This makes my app freeze until I reload the page. It’s really annoying!

I’ve set up a db.ts file in my src/lib folder. I use it to import a query function for my server calls. But something’s not right.

Here’s a simplified version of what I’m trying:

import { DB_CONFIG } from '$env/static/private';
import { createPool } from 'some-db-library';

const dbPool = createPool({
  ...DB_CONFIG,
  maxConnections: 5,
  idleTimeoutMs: 300000,
}).makePromise();

async function runQuery(sql: string, params?: any) {
  try {
    const connection = await dbPool.getConnection();
    const result = await connection.query(sql, params);
    connection.release();
    return result;
  } catch (error) {
    console.error('Database error:', error);
  }
}

export default runQuery;

Can someone help me figure out what’s going wrong? Or maybe suggest a better way to handle MySQL in SvelteKit? Thanks!

2

I’ve encountered similar challenges in my SvelteKit projects. One approach that worked well for me was implementing a connection pool with automatic reconnection using the ‘mysql2/promise’ package. Here’s a simplified example:

import mysql from 'mysql2/promise';
import { DB_CONFIG } from '$env/static/private';

const pool = mysql.createPool({
  ...DB_CONFIG,
  connectionLimit: 10,
  waitForConnections: true,
  queueLimit: 0
});

async function query(sql, params) {
  const connection = await pool.getConnection();
  try {
    const [results] = await connection.query(sql, params);
    return results;
  } finally {
    connection.release();
  }
}

export { query };

This setup handles connection management more efficiently and reduces the likelihood of ECONNRESET errors. Remember to implement proper error handling in your routes and consider adding a retry mechanism for transient errors. Also, don’t forget to call pool.end() when shutting down your app to clean up resources properly.

3

I’ve dealt with similar issues in my SvelteKit projects. One effective approach is to use a connection pool with automatic reconnection capabilities. The ‘mysql2’ package has worked well for me in this regard. Here’s a key point: implement a connection check before each query execution. This ensures you’re always working with a valid connection.

Another crucial aspect is error handling. Wrap your database operations in try-catch blocks and implement a retry mechanism for transient errors. This can significantly improve your app’s resilience.

Lastly, don’t forget to properly close connections when your app shuts down. This prevents resource leaks and can help avoid some of those pesky ECONNRESET errors on subsequent starts.

4

In my experience with similar SvelteKit projects, I found that the key to avoiding ECONNRESET errors was to use a connection pool that automatically manages reconnections. Instead of establishing a new connection for every query, I configured a pool (using mysql2) which allowed me to reuse and monitor connections effectively. I ensured that the pool checked the connection status before each query and, if necessary, reestablished a connection. Additionally, setting proper keepalive options on both the MySQL server and client was crucial to maintaining stability. Handling errors gracefully in your API routes is also important to avoid unexpected freezes.

5

yo, i feel ur pain! mysql can be a pain sometimes. have u tried using a connection pool? it helped me a ton. also, make sure ur error handling is on point. oh, and don’t forget to set up proper timeout values. that might solve ur freezing issue. good luck with ur project, mate!

6

hey there! i’ve seen this before. try using a connection pool rather than making new connections each time. check your error handling and maybe implement reconnection logic if the connection drops. best of luck with your project!