How To Mass Delete Posts

Hi,

I am trying to erase all my wordpress posts. I have tried installing a wordpress plugin called ‘Bulk Delete’ but when i try and delete all the posts i get this error message ‘Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 113 bytes) in /home/content/b/h/a/*******/html/wp-content/plugins/w3-total-cache/lib/W3/ObjectCache.php on line 171’

Can anyone recomend any other plugins i can use or how i can mass delete all my posts on my wordpress blog please?

Thanks