Expert Oracle Exadata - Parent Directory

CHAPTER 6 MAKING PCBStransaction tables consistent reads - undo records applied 015 rows selected.SYS@EXDB1> set timing onSYS@EXDB1> @avgskewAVG(PK_COL)-----------16093750.81 row selected.Elapsed: 00:00:00.79SYS@EXDB1> set timing offSYS@EXDB1> @mystatsEnter value for name: readsNAMEVALUE------------------------------------------------------------ ---------------cold recycle reads 0data blocks consistent reads - undo records applied 0lob reads 0physical reads 5355355physical reads cache 31physical reads cache prefetch 0physical reads direct 5355324physical reads direct (lob) 0physical reads direct temporary tablespace 0physical reads for flashback new 0physical reads prefetch warmup 0physical reads retry corrupt 0recovery array reads 0session logical reads 8296342transaction tables consistent reads - undo records applied 015 rows selected.SYS@EXDB1> select 5355355-5193061 from dual;5355355-5193061---------------1622941 row selected.SYS@EXDB1> @fsx2Enter value for sql_text: %skew%Enter value for sql_id:171