e of catastrophic
database environment failure so applications that do not exit and
restart on failure won't leak file handles. [#6538]</li>
            <li>Replace the Berkeley DB shared memory allocator with a new
implementation, intended to decrease the performance drop-off seen in
database environments having working sets that are larger than the
cache, especially database environments with multiple cache page sizes.
[#13122]</li>
            <li>Fix a bug that would incorrectly cause a thread to appear