Expert Oracle Exadata - Parent Directory

CHAPTER 11 UNDERSTANDING EXADATA PERFORMANCE METRICSPredicate Information (identified by operation id):---------------------------------------------------1 - filter(ROWNUM SELECT * FROM TABLE(exatest.diff('cell num fast.*'));NAMEVALUE---------------------------------------------------------------- ----------cell num fast response sessions 1cell num fast response sessions continuing to smart scan 0The cell fast response feature is controlled by the _kcfis_fast_response_enabled parameter and enabledby default.cell num fast response sessions continuing to smart scanThis statistic shows how many times the cell Smart Scan fast response session was started, but Oraclehad to switch to the real Smart Scan session as it didn’t find enough matching rows with the first few I/Ooperations. The next example query has the first-rows optimization in the execution plan, but theadditional predicate on the object_name column ensures that no matching rows are found during firstfew I/Os from the table:SELECT * FROM t3 WHERE owner like 'S%' AND object_name LIKE '%non-existent%'AND rownum