Parallels Virtualization and Automation Software

SYMPTOMS

Full error message looks like:

ERROR: Unable to connect to database: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (11) 0: /usr/local/psa/admin/auto_prepend/auth.php3:67 psaerror(string "Unable to connect to database: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (11)")

CAUSE

Error code 11 means:

RESOLUTION

Make sure that MySQL is running and you can access it from the command line:

If it works, try to increase maximum connection number for MySQL server. By default the number of simultaneous connections is limited to 100, if MySQL is highly used on your server, you need to increase this limit in /etc/my.cnf in section [mysqld]:

[mysqld]

set-variable=max_connections=200

Then restart MySQL.