Category: Tuning Scripts

Sometime DBAs need to create SQL Baseline for particular SQL_ID for plan stabilization

1) VERIFY CURRENTLY EXISTING SQL PLAN BASELINES

select * from dba_sql_plan_baselines;

 

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Sometimes it is required to flush the BAD SQL_PLAN from shared_pool so that new (or old) better execution plan can be picked by SQL_ID

 

1) FIND ADDRESS AND HASH_VALUE OF SQL_ID

SQL> select ADDRESS, HASH_VALUE from V$SQLAREA where SQL_ID like '7yc%';

ADDRESS          HASH_VALUE
---------------- ----------
000000085FD77CF0  808321886

 

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Finding the SQL_ID for a SQL Statement is straight forward task. You can use query like below to find the SQL_ID

SQL> SELECT sql_id, hash_value, SUBSTR(sql_text,1,40) Text FROM v$sql WHERE sql_text LIKE '%&An_Identifiable_String%';

To Determine the SQL_ID of a SQL Statement in a PL/SQL Block below steps can be followed:

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