Railway•16mo ago

Postgres drops connection when inactive, is this by default?

I'm developing a node app using AdonisJS@5 and on a prolonged inactivity period (more than 5 hours) the database drops the connection, I wanted to know if this is expected and by design on railway

Solution:

Straight up pool.min: 0 as you said In my config/database.ts ```typescript // My other imports...

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19 Replies

Percy•16mo ago

Project ID: 54c2ba8f-05f3-48a7-8347-7fe20afe05a8

AgusOP•16mo ago

54c2ba8f-05f3-48a7-8347-7fe20afe05a8

Ray•16mo ago

Nope, we don't "pause" databases (unless you exceed trial limits, which you didn't). Some questions to help narrow this down: - Are you able to connect to the db externally when this happens? - Are you pooling connections/prematurely releasing them ahead of next query? - Can you elaborate on what "drops the connection" mean here? What error are you seeing from your application? - ^ anything in your database logs on Railway (database -> Logs tab) that would suggest it's dropping connections within similar timestamp ranges?

AgusOP•16mo ago

Are you able to connect to the db externally when this happens?

Yeah, the app eventually re-connects after we try to perform 1 request,

Are you pooling connections/prematurely releasing them ahead of next query?

I'll have to do some digging because we are using a ORM to handle queries

Can you elaborate on what "drops the connection" mean here? What error are you seeing from your application? ^ anything in your database logs on Railway (database -> Logs tab) that would suggest it's dropping connections within similar timestamp ranges?

{"level":40,"time":1692989569205,"pid":20,"hostname":"railway","name":"axer-backend","msg":"Connection Error: Connection ended unexpectedly"}

{"level":40,"time":1692989569205,"pid":20,"hostname":"railway","name":"axer-backend","msg":"Connection Error: Connection ended unexpectedly"}

I'm just digging into this problem so I'm not discarding the posibility of the framework being at fault

Ray•16mo ago

👍 could also try increasing conn timeout and see if that helps

AgusOP•16mo ago

Will try that, with the info that the db doesn't drop the connection narrows my problem Thanks!

Brody•16mo ago

would you be using knex or something that uses knex?

AgusOP•16mo ago

adonis uses lucid https://github.com/adonisjs/lucid

GitHub

GitHub - adonisjs/lucid: AdonisJS SQL ORM. Supports PostgreSQL, MyS...

AdonisJS SQL ORM. Supports PostgreSQL, MySQL, MSSQL, Redshift, SQLite and many more - GitHub - adonisjs/lucid: AdonisJS SQL ORM. Supports PostgreSQL, MySQL, MSSQL, Redshift, SQLite and many more

AgusOP•16mo ago

Aaand it has knex declared as a dependency

Brody•16mo ago

read the note from knex https://knexjs.org/guide/#pool you'll need a way to pass pool.min: 0 to knex through lucid lucid's docs are not great, so I have yet to find out how to do that, but I imagine it wouldn't be hard for you to figure out

AgusOP•16mo ago

I totally agree on this one, awesome thank you!

Brody•16mo ago

hey where you able to find a way to set pool.min to 0?

AgusOP•16mo ago

Yeah, its on the basic pool config

Solution

Agus•16mo ago

Straight up pool.min: 0 as you said In my config/database.ts

// My other imports

const databaseConfig: DatabaseConfig = {
   connections: {
    pg: {
      /// Rest of my config
      pool: {
        min: 0,
      }
    }
};

// My other imports

const databaseConfig: DatabaseConfig = {
   connections: {
    pg: {
      /// Rest of my config
      pool: {
        min: 0,
      }
    }
};

Brody•16mo ago

awsome, and you havent had any issues since?

AgusOP•16mo ago

We just deployed it so I will come back to you in a few hours

Brody•16mo ago

sounds good!

AgusOP•16mo ago

Seems like that did the trick

Brody•16mo ago

awsome!

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Postgres drops connection when inactive, is this by default?