So, that SELECT generated by mysqldump explicitly called to dump information_schema tried to dump summary of content of 40G buffer pool to disk. No wonder you've got the problem.
Read http://dev.mysql.com/doc/refman/5.5/en/innodb-buffer-page-table.html about the table. I think this is more an upstream mysqldump bug/feature request (to skip this table's content by default) if a bug at all. You've got what you asked for...
So, that SELECT generated by mysqldump explicitly called to dump information_schema tried to dump summary of content of 40G buffer pool to disk. No wonder you've got the problem.
Read http:// dev.mysql. com/doc/ refman/ 5.5/en/ innodb- buffer- page-table. html about the table. I think this is more an upstream mysqldump bug/feature request (to skip this table's content by default) if a bug at all. You've got what you asked for...