Manual:$wgUploadStashMaxAge

Files and file uploads: $wgUploadStashMaxAge
The maximum age of temporary (incomplete) uploaded files.
Introduced in version:1.20.0
Removed in version:Still in use
Allowed values:(integer)
Default value:6 * 3600 (6 hours)

Details

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The maximum age of temporary (incomplete) uploaded files. Used only by the cleanupUploadStash.php maintenance script.