Hello grjohnson,

When file system is used, and settung a higher value for DB_FILE_MULTIBLOCK_READ_COUNT will duplicate the IO, because the OS has already read many blocks even though the request is one or 2 blocks.

More over, the wait event WAIT #1: nam='db file scattered read' can not be completely eliminated during a full table scan.
The proper test is reboot the system for every run.

Tamil