Hello/Hi/Greetings,

I am trying to synchronize my whole database. I entered the Tools->Synchronize and used these options:

synchronize file structure with database:

directories + files
display maximal information  - unchecked
add new photos to basket - unchecked


synchronize database photos with file metadata:

Synchronize metadata  - checked
including already synchronized photos - checked
overrides existing values with empty ones - unchecked

perform a simulation only (nothing will be changed in the database) - unchecked

Search in sub-albums - checked

reduce to single existing album  - selected the most top directory (all images in library)

result:
--------
error message appears:  Fatal error: Maximum execution time of 30 seconds exceeded in /var/www/piwigo/include/functions_metadata.inc.php on line 155


I made another test with these parameters:


synchronize file structure with database:

directories + files
display maximal information  - checked
add new photos to basket - checked


synchronize database photos with file metadata:
Synchronize metadata  - checked
including already synchronized photos - checked
overrides existing values with empty ones - unchecked


perform a simulation only (nothing will be changed in the database) - unchecked

Search in sub-albums - checked

reduce to single existing album  - selected the most top directory (all images in library)

Result:
---------
Empty white screen…

How do I fix it? Is it a timeout issue?


Piwigo version 2.7.1

Environment
Operating system: Linux
PHP: 5.3.10-1ubuntu3.19 (Show info) [2015-09-30 11:38:43]
MySQL: 5.5.44-0ubuntu0.12.04.1 [2015-09-30 11:38:43]
Graphics Library: External ImageMagick 6.6.9-7

Database
19705 photos (first photo added on Friday 18 April 2014)
473 albums included 473 physical and 0 virtual (19704 associations)
219 keywords (80295 associations)
4 users
2 groups
no rating