503 errors after upgrade to 3.1.1

Error connecting to your database is common, but it isn’t necessarily a problem with wordpress itself.

-First, double check your wp-config.php file settings for the database name, database username and database password. This is where most errors occur.

-Then check that you don’t need to change the database host from “localhost” to something else. You can get that info from your hosting provider.

-Check you have actually created a database with the same database name as is in your wp-config.php file.

-Last, but not least, if all that information is correct your database probably has a problem with it, and you may need to contact your hosting provider.

There are also many threads on this topic on these forums: https://www.ads-software.com/search/Error+establishing+a+database+connection?forums=1

Thank you for your reply.

The database settings are okay – the problem is intermittent, so the connection is usually successful.

I’ve been running a diagnostic loop in PHP where I establish and then close a connection every second. It failed once with a “Too many connections error” which could be the cause of the problem.

I have noted that when the database is unavailable, there are a large number of MySQL processes in the “Locked” state. These processes are performing queries related to the WordPress database. What could cause so many processes to become “Locked”?

Hello,

I have the same problème since i have uprgaded to WP 3.1.1. It’s the first time that it happens to me.

PHP Version 5.2.17
Mysql version 5.0.67
Hoster 1&1

up