Manual:$wgEditRecoveryExpiry

Miscellaneous settings: $wgEditRecoveryExpiry
Number of seconds to keep Edit Recovery data after the edit is stored.
Introduced in version:1.41.0 (Gerrit change 965179; git #25860105)
Removed in version:still in use
Allowed values:(integer)
Default value:2592000 (= 30 * 24 * 60 * 60)