How to Increase Max Number of DB Connections

https://support.plesk.com/hc/en-us/articles/115002363114-How-to-change-the-max-user-connections-value-in-MySQL-MariaDB-on-a-Plesk-server

  1. Connect to a Plesk server via RDP.
  2. Open the file %plesk_dir%Databases\MySQL\my.ini in a text editor (just paste this path in Windows Explorer to open).
  3. Increase the value of max_user_connections:
    Note: If max_user_connections does not exist, add this line under the [MySQLD] section.
    max_user_connections = 100
  4. Save the changes and close the file.
  5. Open Plesk Services Monitor in Windows Start > All Programs > Plesk.
  6. Select MySQL56 or MariaDB103 under the SQL Server section and click Restart to apply the changes.
What are your feelings