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,
       namespace,
       type,
       name,
       sharable_mem
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