Question Server Error 500 Plesk\Exception\Database

[Colonel36]

Server operating system version

Ubuntu 20.04

Plesk version and microupdate number

Plesk Obsidian18.0.57

Does anyone have any idea how to resolve this below. I try to use the repairkit, but it won't let me login? Many thanks in advance
Server Error
Server Error

500 Plesk\Exception\Database​

DB query failed: SQLSTATE[HY000] [2002] Connection refused

Type	Plesk\Exception\Database
Message	DB query failed: SQLSTATE[HY000] [2002] Connection refused
File	Mysql.php
Line	79

 

[Raul A.]

Hi,

The error indicates all connection slots to the database service have been used up. By default, that is 200 connections and 150 per any single database user.

If

plesk db

fails then you need to restart MariaDB

systemctl restart mariadb

 

[Colonel36]

Many thanks.
Do I need to delete all the obsolete databases then?

 

[Raul A.]

Don't think so. The stored databases don't influence the number of connections.

Your service might be stopped, or several users use up all the connection slots.