Alter System Flush Shared pool in Oracle

I will explain Alter System Flush Shared pool in Oracle in this post.


Alter System Flush shared_pool

Shared Pool is an important memory area used in the vast majority of database operations. Because the query of all the transactions, their execution plans (work plans), the parsed and compiled PL/SQL codes are always stored in this memory area. The shared pool area consists of the following components.



Flush Shared Pool

Sometimes, you may want to clear all data from the shared pool, to Clear all data from shared pool, you need to run flush the shared pool.

For single instances:

SQL> alter system flush shared_pool;


For RAC Environment:

alter system flush shared_pool global;



You can check objects in the library cache as follows.

SELECT owner,
FROM   v$db_object_cache
ORDER BY sharable_mem;


Do you want to learn Oracle Database Performance Tuning detailed, then read the following articles.

Performance Tuning and SQL Tuning Tutorial in the Oracle Database


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About Mehmet Salih Deveci

I am Founder of SysDBASoft IT and IT Tutorial and Certified Expert about Oracle & SQL Server database, Goldengate, Exadata Machine, Oracle Database Appliance administrator with 10+years experience.I have OCA, OCP, OCE RAC Expert Certificates I have worked 100+ Banking, Insurance, Finance, Telco and etc. clients as a Consultant, Insource or Outsource.I have done 200+ Operations in this clients such as Exadata Installation & PoC & Migration & Upgrade, Oracle & SQL Server Database Upgrade, Oracle RAC Installation, SQL Server AlwaysOn Installation, Database Migration, Disaster Recovery, Backup Restore, Performance Tuning, Periodic Healthchecks.I have done 2000+ Table replication with Goldengate or SQL Server Replication tool for DWH Databases in many clients.If you need Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS Consultancy and Training you can send my email adress [email protected].-                                                                                                                                                                                                                                                 -Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS ve linux Danışmanlık ve Eğitim için  [email protected] a mail atabilirsiniz.

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