[xwiki-users] Max_allowed_packet (mySQL)

In a client/server Xwiki/MySQL configuration, where are the appropriate locations to specify max_allowed_packet? (In attempting to import the XEM xar, I am getting an error indicating this may be the cause... The mysql server has the parameter set in /etc/my.cnf) Thanks in advance, -- Jim Dowson, CTO ­ Global Services, EMC Corporation