Nuria added a comment.
After looking at this for a bit with @Ladsgroup and @mpopov (cc @Abit ) A commons page can have data from wikidata and the wikibase instance on commons (called WikibaseMediaInfo, MediaInfor for short). wbc_entity_usage will not have any data from structured data on commons that is kept on WikibaseMediaInfo. The data on that table only pertains to wikidata items used by "wiki clients". "wiki clients" are users of iwkidata's data , like eswiki. So, to find "how many file pages on commons contain at least 1 structured data element" looking at slots is sufficient. That should be inclusive of all commons files. That number is ~3 million. Now, there are pages in commons that use, for example, wikidata info boxes, like: https://commons.wikimedia.org/wiki/Category:Lucas_Werkmeister The pages using wikidata items on commons can be tracked with wbc_entity_usage and that number is 7.9 million as of today. Now, to be clear, the 7.9 pertains entirely to a different set of infrastructure, namely wikidata's. None of those 7.9 structure data items represent any info on the WikibaseMediaInfo instance. Ping @matthiasmullie to asses this info TASK DETAIL https://phabricator.wikimedia.org/T238878 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Nuria Cc: Milimetric, Cparle, nettrom_WMF, Ladsgroup, daniel, Mayakp.wiki, gsingers, matthiasmullie, Addshore, kzimmerman, mpopov, Ramsey-WMF, Abit, Nuria, 4748kitoko, darthmon_wmde, DannyS712, Nandana, JKSTNK, Akovalyov, Lahi, PDrouin-WMF, Gq86, E1presidente, Anooprao, SandraF_WMF, GoranSMilovanovic, QZanden, Tramullas, Acer, LawExplorer, Salgo60, Silverfish, _jensen, rosalieper, Scott_WUaS, Susannaanas, JAllemandou, Jane023, terrrydactyl, Wikidata-bugs, Base, aude, Ricordisamoa, Wesalius, Lydia_Pintscher, Fabrice_Florin, Raymond, Steinsplitter, Mbch331, jeremyb
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