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@jae @griffith @fwc @mischievoustomato @sneeden @bigtony

When data retention parameters are changed, mitra starts removing unnecessary posts from the database and associated media from the filesystem. Media deletion happens in background tasks which block other background tasks, including incoming federation (not outgoing, which uses different thread).

If the number of deleted posts is huge, processing of media cleanup tasks may take a long time, leading to a noticeable delay in federation. But this doesn't lead to data loss.