Thread:Project:Support desk/Out of memory not matter what I do./reply (21)

None of them reduce the memory_limit. The lines in GlobalFunctions.php are for increasing it (only if $wgMemoryLimit is set), but it doesn't reduce it if it's lower than the configured value in php.ini

Maybe the server has no more physical memory for PHP, or there's another limitation imposed by the user running nginx (ulimit for example)