Piwigo encountered a non recoverable error

[mysql error 1040] Too many connections
Can't connect to server

#1	my_error /mnt/153/sda/6/6/us.chateauthebaud/galerie_photos/piwigo/include/common.inc.php(140)
#2	include_once /mnt/153/sda/6/6/us.chateauthebaud/galerie_photos/piwigo/picture.php(25)

Fatal error: [mysql error 1040] Too many connections Can't connect to server #1 my_error /mnt/153/sda/6/6/us.chateauthebaud/galerie_photos/piwigo/include/common.inc.php(140) #2 include_once /mnt/153/sda/6/6/us.chateauthebaud/galerie_photos/piwigo/picture.php(25) in /mnt/153/sda/6/6/us.chateauthebaud/galerie_photos/piwigo/include/functions_html.inc.php on line 418