I have set up Piwigo so that the photos are held in a directory on the site 'ROOT' outside of the Piwigo directory - so I upload the photos using FTP.

After I synchronise and import the photos, if I go to the new album the generation of the photo thumbnails utilises 100% CPU for a minute or more if I have the number of thumbnails set to 20.

For small albums (ie say 10-20 photos) this is not a problem, but I have some initial albums that have over 50 and in some cases over 100 photos and to generate the thumbnails for these will utilise the CPU for longer than my host would like.

With Piwigo 2.4 on the thumbnails are created and stored in the '_data/i/.....' directory and stored as 'filename_th.jpg'.

Is is possible to create the thumbnails in another way without hogging the cpu - eg on the PC and manually uploading them.

NOTE: I have no access to my gallery for a few days, hence asking the question instead of trying it.