WHY THE PGA IS REQUIRED FOR EACH USER?

Hello everyone;

I have a question about PGA.

WHY THE PGA IS REQUIRED FOR EACH USER?

What I got from google...

Even if information analysis of SQL or PL/SQL is already available in the library of shared pool cache,

the value that the user want to execute the statement select or update cannot be shared.

I can't realize that someone can show an example of clear, if possible?

DB version is 10.2.0.4.0

OS: oracle linux 5.5

Thanks in advance...

PGA is memory private belonging to a specific user. This private memory contains of these pieces that is not supposed to be shared with others. For example, when you sort a part of the data, that does not mean all he wants too. If Oracle retains the sorted data requested by you in your own PGA. Similarly, if you want to query a table with a value of 10, it does not mean that all want the same thing. If these structures are stored in the PGA. For a more detailed description, read the link given by Hoek.

HTH

Aman...

Tags: Database

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