I have two image pages (File:filename1.png, File:filename2.jpg) that, when opened, show a blank empty page on the server. It seems to happen when someone uploads images with big resolution (the images are there correctly uploaded, but their "File:" wiki pages are broken).

On local development server, I can replicate the error, and I can read a debug message instead of an empty blank page:

"Fatal error: Allowed memory size of 52428800 bytes exhausted (tried to allocate 12417800 bytes) in path\to\includes\media\Bitmap.php on line 212"

I've tried to raise "memory_limit" to 512MB in php.ini and with ini_set in LocalSettings.php, but no luck - same error.

Now, I would like at least to be able to delete those two "broken" image pages, i.e. I don't want them in the wiki. Any suggestions on how to do it, eventually also acting directly on the database?

Besides, how to avoid that happening again?

Thanks,