Lucas_Werkmeister_WMDE added a comment.

  These metrics come from analytics-wmde-scripts dispatch.php 
<https://gerrit.wikimedia.org/g/analytics/wmde/scripts/+/e640deb38e54ef1b19d944d80bad417e174636d2/src/wikidata/dispatch.php>,
 and are read from action=query&meta=siteinfo&siprop=statistics 
<https://www.wikidata.org/w/api.php?action=query&meta=siteinfo&format=json&siprop=statistics>.
 The data is supposed to be added to those statistics in 
RepoHooks::onAPIQuerySiteInfoStatisticsInfo() 
<https://gerrit.wikimedia.org/g/mediawiki/extensions/Wikibase/+/c048d6e2365b979a71bcffd095f94930470dd767/repo/includes/RepoHooks.php#851>,
 but that no longer has statistics to add: since we migrated change dispatching 
to the job queue, the `wb_changes` table is now empty most of the time, so the 
statistics are missing from the API response, and `dispatch.php` probably calls 
`WikimediaGraphite::sendNow()` with a null `$value` (after triggering some 
warnings for accessing nonexistent array keys).
  
  We’re restoring a small amount of dispatch statistics in T291846: New Content 
for Special:DispatchStats <https://phabricator.wikimedia.org/T291846>, but I 
don’t know if we’ll add this to the API as well, and/or whether this will be 
worth tracking in Graphite at all.

TASK DETAIL
  https://phabricator.wikimedia.org/T293329

EMAIL PREFERENCES
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To: Lucas_Werkmeister_WMDE
Cc: Lucas_Werkmeister_WMDE, Michael, fgiunchedi, Addshore, Aklapper, 
karapayneWMDE, Invadibot, maantietaja, lmata, Akuckartz, Nandana, Lahi, Gq86, 
herron, GoranSMilovanovic, QZanden, LawExplorer, _jensen, rosalieper, 
Scott_WUaS, Wikidata-bugs, aude, Lydia_Pintscher, Mbch331
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