How do I create a custom SQL profile?

What is SQL profile?

A SQL profile is a set of auxiliary information specific to a SQL statement. Conceptually, a SQL profile is to a SQL statement what statistics are to a table or index. The database can use the auxiliary information to improve execution plans. … Therefore, SQL profiles just guide the optimizer to a better plan.

What is Coe_xfr_sql_profile SQL in Oracle?

The coe_xfr_sql_profile. sql script generates another script that, in turn, contains the commands to create a manual custom SQL Profile out of a known plan that resides in RAM (library cache) or from the AWR dba_hist_sqlplan table.

How use SQL Profiler for performance tuning in Oracle?

Optimize Queries with Oracle SQL Profiler

  1. Compare query profiling results to determine whether query execution time has been reduced after the change.
  2. Detect potential bottlenecks that may slow down query performance.
  3. Analyze the EXPLAIN plan and track session statistics.

How can I tell if a SQL profile is used?

SQL Profile is used by Optimizer for use more efficient execution plan for the SQL Query to make in accepted State. It is found in DBA_SQL_PROFILES view. It used to choose better plan by optimizer if the SQL profile plan is having low cost then optimizer use it. Check the SQL Profile in the Database.

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How do I find my SQL profile?

Manage SQL Profile in Oracle Database

  1. Check the SQL Profile in the Database. COLUMN category FORMAT a10. COLUMN sql_text FORMAT a20. …
  2. Check the SQL Profile internal hint information. SELECT. a.name. …
  3. Create the SQL Profiles. Two ways: …
  4. Disable the SQL Profiles. BEGIN.

How do I find the Oracle SQL profile name?

Oracle SQL profile

  1. Run SQL tuning advisor. Run the following SQL tuning advisor code for sql_id, 6dkrnbx1zdwy38 : …
  2. Accept the sql_profile. Run the following code to accept the sql_profile:
  3. Check the name of the sql_profile. Use the following query to check the sql_profile name:
  4. Disable the sql_profile. …
  5. Drop the sql_profile.

How do I copy a SQL profile from one database to another?

Follow below steps for migrating sql profiles from one database to another.

  1. Create a staging table. SQL> exec DBMS_SQLTUNE. …
  2. Pack the profiles to the staging table. SQL> exec DBMS_SQLTUNE. …
  3. Export the staging table: …
  4. copy the dump to target db and import the table. …
  5. Unpack the sql profiles.

How do I create a baseline in SQL?

You can create a SQL plan baseline in several ways: using a SQL Tuning Set (STS); from the cursor cache; exporting from one database and importing into another; and automatically for every statement.

What is automatic SQL tuning?

Automatic SQL Tuning is a new capability of the query optimizer that automates the entire SQL tuning process. Using the newly enhanced query optimizer to tune SQL statements, the automatic process replaces manual SQL tuning, which is a complex, repetitive, and time-consuming function.

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What is performance tuning in PL SQL?

Use of DBMS_PROFILER for PL SQL performance tuning :

The Profiler traces the execution of your program, computing the time spent at each line and in each subprogram. You can use the collected data to improve performance. The Profiler is useful when the same query we need to execute again and again.

How do I find my SQL Tuning Advisor?

How to Run Oracle 12c’s SQL Tuning Advisor

  1. Use PL/SQL and the internal package DBMS_SQL_TUNE to create a tuning task. …
  2. Execute the tuning advisor with your task by typing this: …
  3. When the execution is complete, you can view the results by running the BMS_SQLTUNE. …
  4. Add the index with your own name by typing this: