Warning: Got a packet bigger than 'max_allowed_packet' bytes query

Help! Da un paio di mesi, quando vado ad editare un qualsiasi nodo, ottengo questo errore

Quote:

Warning: Got a packet bigger than 'max_allowed_packet' bytes query: INSERT INTO watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (1, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:12:\"user warning\";s:8:\"%message\";s:2609794:\"Got a packet bigger than 'max_allowed_packet' bytes\nquery: UPDATE cache_menu SET data = 'a:2:{s:4:\\"tree\\";a:109:{i:2;a:2:{s:4:\\"link\\";a:37:{s:14:\\"load_functions\\";s:0:\\"\\";s:16:\\"to_arg_functions\\";s:0:\\"\\";s:15:\\"access_callback\\";s:11:\\"user_access\\";s:16:\\"access_arguments\\";s:45:\\"a:1:{i:0;s:27:\\"access administration pages\\";}\\";s:13:\\"page_callback\\";s:22:\\"s in /home/cesarea1/public_html/includes/database.mysql.inc on line 128

seguito da una carrellata di user warning.

Secondo voi da cosa potrebbe dipendere? Compaiono esclusivamente in fase di modifica/creazione di un nodo...