The Smart Scan Summary is part of the Performance Summary section of the AWR report. This area contains a high-level summary of key statistics associated with smart I/O. The following example highlights a situation where some activity reverted to block I/O because of ongoing online encryption.

The Smart IO Statistics section of the AWR report contains more detailed summarized statistical information for smart I/O operations on the whole system and on each storage server. In particular, it tracks the amount of I/O that is eligible for optimization using Smart Scan, the savings from using storage indexes and columnar cache, the amount of data in Exadata Smart Flash Cache, and the amount of data filtered by the storage servers without transportation back to the database server. It also shows associated database statistics and more detailed information about situations where the storage servers are unable to perform predicate evaluation (also known as 'passthru').