Database back up error
 

Hello
I am trying to backup my db and the following error shows up at the end of the file. I'm assuming I have to change some mysql setting but idk which one?
error:
Allowed memory size of 33554432 bytes exhausted (tried to allocate 21261629 bytes) in /var/www/html/phpMyAdmin-2.11.5-all-languages/libraries/export/sql.php on line 897