Piwigo encountered a non recoverable error

[mysql error 1040] Too many connections
mysql_connect

#1	my_error /mnt/159/sdb/8/1/mottevillerampedev1/piwigo/include/common.inc.php(107)
#2	include_once /mnt/159/sdb/8/1/mottevillerampedev1/piwigo/picture.php(25)

Fatal error: [mysql error 1040] Too many connections mysql_connect #1 my_error /mnt/159/sdb/8/1/mottevillerampedev1/piwigo/include/common.inc.php(107) #2 include_once /mnt/159/sdb/8/1/mottevillerampedev1/piwigo/picture.php(25) in /mnt/159/sdb/8/1/mottevillerampedev1/piwigo/include/functions_html.inc.php on line 690