Manual:$wgEnableAsyncUploads

Files and file uploads: $wgEnableAsyncUploads
Enable deferred upload tasks that use the job queue.
Introduced in version:1.21.0 (Gerrit change 48940; git #fbf34d84)
Removed in version:still in use
Allowed values:(boolean)
Default value:false

Details edit

Enable deferred upload tasks that use the job queue. Only enable this if job runners are set up for both the 'AssembleUploadChunks' and 'PublishStashedFile' job types.