Back in 2021 and version 12, Piwigo introduced the "lounge". It is buffer mecanism. See description on https://piwigo.org/release-12.0.0#technical_features :
Lounge
New background mechanism, the “lounge“, to bufferize photos during upload. This will avoid too many user cache rebuilds. To make it more understandable: the server load will be much lower on large galleries during photo upload. When saying "large galleries" we mean 100,000 photos and more.
When you upload a photo, it is not immediately visible in the gallery (not even in the administration) of Piwigo. The lounge must be emptied first. You can either wait (5 minutes by default, see Piwigo $conf['lounge_max_duration']) or force the publish by calling pwg.images.uploadCompleted.
Piwigo Remote Sync should call pwg.images.uploadCompleted at the end of uploads.
Back in 2021 and version 12, Piwigo introduced the "lounge". It is buffer mecanism. See description on https://piwigo.org/release-12.0.0#technical_features :
When you upload a photo, it is not immediately visible in the gallery (not even in the administration) of Piwigo. The lounge must be emptied first. You can either wait (5 minutes by default, see Piwigo
$conf['lounge_max_duration']) or force the publish by callingpwg.images.uploadCompleted.Piwigo Remote Sync should call
pwg.images.uploadCompletedat the end of uploads.