hi, i was looking at memory usage on zedler recently, and discovered that grant tables are using a significant amount of memory. i have implemented a better solution, but as a side-effect, names of databases are changing. from now on, each database X should be accessed as X_p (e.g.: "enwiki_p"). the old names will stop working shortly (sooner rather than later, since i would like to reclaim the wasted memory). also, the "rc_filtered" and "ar_filtered" tables will be known as "recentchanges" and "archive" instead. this will free about 2GB of RAM to be used by InnoDB, which should improve performance. k.