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Column PLAN_HASH_VALUE IN V$SQLSTATS Continuously Changes (Doc ID 1345516.1)

Last updated on FEBRUARY 18, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.1 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

On an active database instance, the PLAN_HASH_VALUE column of the V$SQLSTATS view will change periodically, even when queried against the same SQL_ID.

SQL> SELECT sql_id, plan_hash_value
  2  FROM v$sqlstats
  3  WHERE sql_id = '7qqk2mb9413n1';

SQL_ID        PLAN_HASH_VALUE
------------- --------------- 
7qqk2mb9413n1       417671951

SQL> /

SQL_ID        PLAN_HASH_VALUE
------------- ---------------
7qqk2mb9413n1      2752876211

Changes

You've made no changes to the database release level nor to the database parameters.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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