Guy i just received a fatal error when i try to do mass delete (plugin), it was ok for month, everything just happen today ...

error code :
Code:
Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 71 bytes) in /home/***/domains/***********.com/public_html/wp-includes/taxonomy.php on line 1961
anyone can help ? sorry i'm noob in code