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How Does Dbms_Stats Gather_Dictionary_Stats And Gather_Database_Stats Procedures Collect Sys and System Statistics? (Doc ID 2100050.1)

Last updated on NOVEMBER 04, 2019

Applies to:

Oracle Database - Standard Edition - Version 11.2.0.4 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Information in this document applies to any platform.

Purpose

 The document clarifies how sys and system stats are gathered by procedures DBMS_STATS.GATHER_DICTIONARY_STATS and DBMS_STATS.GATHER_DATABASE_STATS.

Questions and Answers

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In this Document
Purpose
Questions and Answers
 Does executing "DBMS_STATS.GATHER_DICTIONARY_STATS" gather statistics on schemas other than the "SYS" schema?
 What is the difference between "DBMS_STATS.GATHER_DICTIONARY_STATS" and "DBMS_STATS.GATHER_SCHEMA_STATS ('SYS')"?
 Does "DBMS_STATS.GATHER_DATABASE_STATS" gather statistics on both the 'SYS' and 'SYSTEM' schemas? Do I need to specify "GATHER_SYS=>TRUE" to achieve this?


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