Error establishing a database connection

[ChrisPAR]

It seems your website is trying to open more connections to the database than those allowed:

@Admin

Every database user is only allowed to have a limited number of database connections. If that limit is hit, additional connections cannot be opened until the number of active connections is reduced. This could explain why you only get the error sometimes: even a website that uses too many database connections will only sometimes see this issue.

You can try the advice @KangJL shared in the topic I linked:

@KangJL

Reduce the number of plugins used?

And also check out this post which provides additional information and things you can try out:

How to fix max_user_connections problem

The “max_user_connections” limit it set to prevent a single account from creating a ton of connections to the database and overloading the server, causing problems for everyone else. Increasing the maximum number of connections would be the easy solution. But unless you host your own database server, you can’t change that limit. Note that this is a MySQL restrictions, not a PHP restriction. Instead, there are some other things you could try: If you have multiple websites on the same account,…