Expert Oracle Exadata - Parent Directory

CHAPTER 3 HYBRID COLUMNAR COMPRESSIONEnter value for table_name: SKEW3_OLTPPL/SQL procedure successfully completed.Elapsed: 00:00:12.75SYS@SANDBOX1> @gather_table_statsEnter value for owner: KSOEnter value for table_name: SKEW3_BASICPL/SQL procedure successfully completed.Elapsed: 00:00:12.60SYS@SANDBOX1> @gather_table_statsEnter value for owner: KSOEnter value for table_name: SKEW3_HCC1PL/SQL procedure successfully completed.Elapsed: 00:00:14.21SYS@SANDBOX1> @gather_table_statsEnter value for owner: KSOEnter value for table_name: SKEW3_HCC2PL/SQL procedure successfully completed.Elapsed: 00:00:14.94SYS@SANDBOX1> @gather_table_statsEnter value for owner: KSOEnter value for table_name: SKEW3_HCC3PL/SQL procedure successfully completed.Elapsed: 00:00:14.24SYS@SANDBOX1> @gather_table_statsEnter value for owner: KSOEnter value for table_name: SKEW3_HCC4PL/SQL procedure successfully completed.Elapsed: 00:00:21.33And again for clarity, Table 3-3 shows the timings in a more readable format.Table 3-3. Statistics Gathering Timing for SKEW3Table Name Compress For Compression Ratio Run Time Run Time RatioSKEW3 12.14SKEW3_OLTP OLTP 1.4 12.7 5 1.0579