dimensions:
size management: Y/N
Number of records: every 1 million
Implementations: RealDB, Derby, MySQL MyISAM, MySQL InnoDB

metrics:
Database size (assuming no filesystem overhead)
DB startup and creation:
 time
 disk sectors reads/writes
DB load and shutdown:
 time
 disk sectors read/write
 reads/writes disk millis
 user and kernel mode jiffies (incl children)
