Log spam when fetching keys from disk

During rebalance of a node which has evicted keys from RAM, I see thousands of the following in the logs:

INFO REPORT <5632.225.0> 2010-07-19 14:33:13
===============================================================================

Message from memcached: Queued a background fetch, now at 1

Found match in report number 378885

INFO REPORT <5632.225.0> 2010-07-19 14:33:13
===============================================================================

Message from memcached: Fetching `00167812' in the background

These messages also continue even after the rebalance is stopped, so it seems like some backfill thread is still running.

I think we don't have any hope of being able to transfer or replicate any vbucket with a substantial number of items paged to disk if we're going to pull items up one at a time in the backfill thread, nor if we log for each item.