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SQL Optimizer for Oracle 9.3.3 - User Guide

Welcome to SQL Optimizer
About SQL Optimizer SQL Optimization Workflow New in This Release Additional Resources Database Privileges Database Privileges Script Connect to the Database Windows Layout Customize Toolbars Keyboard Shortcuts Support Bundle Register SQL Optimizer Check for Updates SQL Operations
ALL PARTITION ALTER INDEX AND EQUAL ANTI JOIN BITMAP AND BITMAP COMPACTION BITMAP CONSTRUCTION BITMAP CONVERSION BITMAP INDEX BITMAP JOIN INDEX UPDATE BITMAP JOIN INDEX UPDATE STATEMENT BITMAP KEY ITERATION BITMAP MERGE BITMAP MINUS BITMAP OR BUFFER SORT CARTESIAN JOIN COLLECTION ITERATOR CONCATENATION CONNECT BY CONNECT BY PUMP COUNT COUNT STOPKEY CREATE AS SELECT CUBE SCAN DDL STATEMENT DELETE DOMAIN INDEX FAST FULL INDEX SCAN FILTER FIRST ROWS FIXED INDEX FIXED TABLE FOR UPDATE FULL INDEX SCAN FULL INDEX SCAN DESCENDING FULL INDEX SCAN (MIN/MAX) HASH GROUP BY HASH GROUP BY PIVOT HASH JOIN HASH JOIN BUFFERED HASH PARTITION HASH UNIQUE INDEX INDEX BUILD NON UNIQUE INDEX RANGE SCAN INDEX RANGE SCAN DESCENDING INDEX RANGE SCAN (MIN/MAX) INDEX SAMPLE FAST FULL SCAN INDEX SKIP SCAN INDEX SKIP SCAN DESCENDING INDEX UNIQUE SCAN INLIST ITERATOR INLIST PARTITION INSERT INTERSECTION INTO INVALID PARTITION ITERATOR PARTITION LOAD AS SELECT MAT_VIEW ACCESS MAT_VIEW REWRITE ACCESS MERGE JOIN MINUS MULTI-TABLE INSERT NESTED LOOPS OUTER JOIN PARTITION PARTITION HASH EMPTY PARTITION LIST PARTITION RANGE PROJECTION PX BLOCK ITERATOR PX COORDINATOR PX ITERATOR PX PARTITION PX PARTITION HASH ALL PX PARTITION LIST ALL PX PARTITION RANGE ALL PX RECEIVE PX SEND RANGE PARTITION RECURSIVE EXECUTION RECURSIVE WITH PUMP REFERENCE MODEL REMOTE SELECT SEMI JOIN SEQUENCE SINGLE PARTITION SINGLE RANGE PARTITION SORT SORT AGGREGATE SORT GROUP BY SORT GROUP BY CUBE SORT GROUP BY NOSORT SORT GROUP BY ROLLUP SORT JOIN SORT ORDER BY SORT UNIQUE SQL MODEL TABLE ACCESS TABLE ACCESS BY GLOBAL INDEX ROWID TABLE ACCESS BY INDEX ROWID TABLE ACCESS BY LOCAL INDEX ROWID TABLE ACCESS BY ROWID TABLE ACCESS BY USER ROWID TABLE ACCESS CLUSTER TABLE ACCESS FULL TABLE ACCESS HASH TABLE ACCESS SAMPLE TABLE QUEUE TEMP TABLE GENERATION TEMP TABLE TRANSFORMATION UNION UNION ALL UNION ALL (RECURSIVE WITH) UNPIVOT UPDATE VIEW VIEW PUSHED PREDICATE WINDOW
Optimize SQL
Create Optimize SQL Sessions Open Optimizer SQL Sessions Rewrite SQL Generate Execution Plan Alternatives
Optimize Indexes Batch Optimize SQL Scan SQL Inspect SGA Analyze Impact Manage Plans Configure Options SQL Optimizer Tutorials About Us Legal Notices

General (Best Practices)

To set general best practices options

  1. Click in the main menu.

  2. Select Optimize SQL | Best Practices | General.

  3. Review the following for additional information:

    Display Best Practices tab in SQL Rewrite mode

    Select to display the Best Practices tab.

    Note: Best Practices is only available for SQL Rewrite session in Optimize SQL.

 

Related Topics

View Best Practices

Table (Best Practices)

Index (Best Practices)

Statistics (Best Practices)

Plan (Best Practices)

Table

This topic focuses on information that may be unfamiliar to you. It does not include all step and field descriptions.

To set Best Practices table options

  1. Click in the main menu.

  2. Select Optimize SQL | Best Practices | Table.

  3. Review the following for additional information:

    Checked for chained rows

    Click and select whether to check tables for chained rows.

    Default: Ignore

    Ratio of smallest partition to the largest partition is less than (%)

    Enter a percentage for the ratio of the smallest partition to the largest partition in a table.

    Default: 40%

    Note: The value you enter determines whether Best Practices recommends you change the partitioning size setting.

 

Related Topics

View Best Practices

General (Best Practices)

Index (Best Practices)

Statistics (Best Practices)

Plan (Best Practices)

Index

This topic focuses on information that may be unfamiliar to you. It does not include all step and field descriptions.

To set Best Practices index options

  1. Click in the main menu.

  2. Select Optimize SQL | Best Practices | Index.

  3. Review the following for additional information:

    Determine selectivity when there are no statistics

    Select one of the following:

    • Ignore—Skips indexes without statistics.
    • Compute—Calculates selectivity for indexes without statistics.
    • Compute All—Calculates selectivity for indexes with and without statistics.

    Default: Compute

    Compute selectivity by sampling (%)

    Enter the percentage of data to use for calculating selectivity.

    Default: 0.10%

    Note: This value is used when you select Compute or Compute All for calculating selectivity.

    Determine if index tree is unbalanced

    Click and select whether to check for unbalanced index trees.

    Default: Ignore

 

Related Topics

View Best Practices

General (Best Practices)

Table (Best Practices)

Statistics (Best Practices)

Plan (Best Practices)

Statistics

To set Best Practices statistics options

  1. Click in the main menu.

  2. Select Optimize SQL | Best Practices | Statistics.

  3. Review the following for additional information:

    Warning for stale statistics when data changes are greater than (%)

    Enter the percentage of data that must be modified since the last statistics update to generate a warning message to update statistics.

    Default: 10%

 

Related Topics

View Best Practices

General (Best Practices)

Table (Best Practices)

Index (Best Practices)

Plan (Best Practices)

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