* Resize the expires and Sets hash tables if needed as well? For Sets the right moment to check for this is probably in SREM
* check 'server.dirty' everywere. Make it proprotional to the number of objects modified.
* Cover most of the source code with test-redis.tcl
+ * Remove tmp-.... files when saving child exits in the wrong way, to do so use tmp-pid.rdb as filename so that the parent can rebuild the file name just from the child pid.
AFTER 1.0 stable release