Piwigo 12.2.0 - Although this issue has been around for many versions; getting around to finally solving it
Operating system: Linux
PHP: 7.0.32 (Show info) [2022-05-11 18:16:44]
MySQL: 5.1.72 [2022-05-11 18:16:44]
Graphics Library: External ImageMagick 6.2.8
Cache size 14013.81 Mo   calculated 17 hours ago Refresh

Whenever I synchronize I get an 'out of memory' failure in site_reader_local.php on line 141

Dashboard -> Quick Local Synchronization OR
Administration -> Tools -> Synchronize
Quick or full sync yields this:
Fatal error: Out of memory (allocated 75497472) (tried to allocate 4096 bytes) in /xx/xx/www/main/admin/site_reader_local.php on line 141


phpinfo shows this:

Administration -> Tools -> Maintenance -> PHP: 7.0.32 (Show info) [2022-05-11 15:57:27]
Core
PHP Version    7.0.32
Directive    Local Value    Master Value
memory_limit    2G    2G


I have lived with this behavior for years because the background tasks have always completed the imports. Now I find I am getting double imports and would like to resolve the root cause.

Anyone seen this? Is there another memory_limit I should adjust? What am I missing? Would more information be helpful?