[Preview Generator] PHP Fatal error


When I start the Preview Generator with “sudo -u http php56 occ preview:generate-all”, I get the follow error

PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 12000 bytes) in /volume1/web/nextcloud/lib/private/legacy/image.php on line 477

The memory size of php is 256M.

Does somebody has any idea?