How do you drop a baseline in Oracle?

How do you drop a baseline in Oracle?

Below is the steps for dropping a sql baseline from the database. An sql_handle can have multiple sql baselines tagged, So if you want to drop all the sql baselines of that handle, then drop the sql handle itself.

What is SQL plan baseline in Oracle?

SQL plan management uses a mechanism called a SQL plan baseline. A plan baseline is a set of accepted plans that the optimizer is allowed to use for a SQL statement. In the typical use case, the database accepts a plan into the plan baseline only after verifying that the plan performs well.

How do I disable a SQL plan?

Using SQL Server Management Studio Right-click the plan guide you want to disable or enable and select either Disable or Enable.

How do I find SQL plan baselines?

Identify the SQL_ID of the SQL statement by querying the V$SQL view. Use this SQL_ID to manually load the SQL plan baseline. The DBA_SQL_PLAN_BASELINES view provides information about the SQL plan baselines. We can see there is a single plan associated with our baseline, which is both enabled and accepted.

How do I drop an Oracle SQL profile?

1. Disable the SQL Profiles. BEGIN. DBMS_SQLTUNE.ALTER_SQL_PROFILE( name => ‘SYS_SQLPROF_789tfag56hjli0004’,
2. Drop the SQL Profile. exec dbms_sqltune.drop_sql_profile(‘SYS_SQLPROF_9824ryfg6f7d78653’);
3. Drop all profiles in a database, using PL/SQL block: declare. cursor c1 is select name from dba_sql_profiles; begin.

How do I evolve a SQL plan baseline?

Thus, you can evolve a SQL plan baseline either by executing the evolve_sql_plan_baseline function or by using the SQL Tuning Advisor. New and provably better plans will be added by either of these methods to the SQL plan baseline.

What is the difference between SQL Profiles and SQL plan baselines?

So, SQL profiles provide additional information to the optimizer to help select the best plan; they don’t constrain the optimizer to any specific plan, which is why they can be shared. SQL plan baselines, on the other hand, constrain the optimizer to only select from a set of accepted plans.

How can I change SQL plan in Oracle?

Perform the following steps:

1. Open Enterprise Manager DB Control and login as the system user.
2. Select the Server tab.
3. Under Query Optimizer, select SQL Plan Control.
4. Select the SQL Plan Baseline tab.
5. Under Settings, select the link FALSE for Capture SQL Plan Baselines.

What is the difference between SQL profile and baseline?

How do I delete a database profile?

In SQL Server, you can use the sysmail_delete_profile_sp stored procedure to delete an existing Database Mail profile. You can delete a profile by providing either its name or its ID (but you must provide either one or the other).

How do you delete an email in SQL?

How do I delete a mail queue in SQL Server?

delete from msdb. dbo. sysmail_unsentitems; This line is just running a default option from SQL server trying to clear the queue, and even this gets stuck.

How do I clear my database mail log?

Use the sysmail_delete_log_sp stored procedure to permanently delete entries from the Database Mail log. An optional argument allows you to delete only the older records by providing a date and time. Events older than that argument will be deleted.

How do I clean up MSDB database?

You could use the database maintenance plan – Cleanup History task and configure it to clean up backup tables automatically. Select the Cleanup History task in the maintenance plan and click Next. On the next page, select the value for the “Remove historical data older than” parameter.

How do I clean up my SQL database?

Using SQL Server Management Studio

1. In Object Explorer, connect to an instance of the SQL Server Database Engine, and then expand that instance.
2. Expand Databases, right-click the database to delete, and then click Delete.
3. Confirm the correct database is selected, and then click OK.

How do I purge old data in SQL Server?

Expand Databases, right-click the database from which to delete the file, and then click Properties. Select the Files page. In the Database files grid, select the file to delete and then click Remove. Click OK.

How do I delete old SQL backup maintenance plan?

How to Auto Delete Old Backup Files Using Maintenance Plan?

1. Launch SSMS and enable SQL Server Agent.
2. Click Toolbox next to Object Explorer, select Maintenance Cleanup Task and drag it into the right blank.
3. Select Backup files as the deleting files.

Why is my MSDB database so large?

MSDB stores backup and restore history. Imagine a server with 2000 databases that takes a log backup of all of them every 15 minutes. That’s 192,000 new rows into the backupset and backupmediaset tables EVERY DAY! Keeping a few weeks or months of history can cause the size of MSDB to get very large.

How do I reduce the size of MySQL database?

Run this query: mysql> ALTER TABLE b_crm_event_relations ROW_FORMAT=COMPRESSED; After running it, you can see that the size of the table has reduced from 26 MB to 11 MB due to the compression. By compressing the tables, you can save much disk space on your host.