wiredtiger/wiredtiger — pull request #450 by michaelcahill (2013-02-06 12:42:38+00:00)
Title: Try to merge split-merge pages to minimize deepening the in-memory tree

Here are some changes that allow eviction to consider merging a set of split-merge pages. They are passing tests, but could use careful review and discussion about the heuristics for when to try this.