Solved

Oracle connection/session not closing

Posted on 2012-03-14
2
943 Views
Last Modified: 2012-03-15
Following a .net query of an Oracle DB, I issue a conn.close command, but the application session in Oracle remains active until the application is closed.  How do I end the connection and Oracle session once I have retrieved the results of the query?
0
Comment
Question by:mdreed
2 Comments
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 37723215
Are you disposing of the reference once you have closed the connection? Also, are you using connection pooling?
0
 
LVL 40

Accepted Solution

by:
Jacques Bourgeois (James Burger) earned 500 total points
ID: 37723419
ADO.NET uses a mechanism called connection pooling. When you call Close on a connection object, the physical connection on the server is not closed immediately. It is held open for a certain period, 5 minutes by default for SQL Server, I suppose it is of the same order for Oracle.

If you reopen a connection object with the exact same connectionstring during that timeout period, the same connection is reused. The connection is really closed if you do not use the connection during that time, or if you close the application.

This is actually a good thing.

Before .NET, we used to keep a connection opened as long as the application was active, through a public (global) object. A very bad thing that often caused problems.

It is always better to use local variables when possible. This means that you would normally need to open and close a connection in each method that needs one, even when methods are called in a loop or recursively. This would be very painful on the server, because a opening and closing a connection requires a lot of work (validating the user, managing the users pool, etc.).

Connection pooling is a good compromise.

If you really do not want connection pooling to be active, look through the documentation for your Oracle library. The pool can usually be controlled by specific indications in the connection string.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Checking the Alert Log in AWS RDS Oracle can be a pain through their user interface.  I made a script to download the Alert Log, look for errors, and email me the trace files.  In this article I'll describe what I did and share my script.
Real-time is more about the business, not the technology. In day-to-day life, to make real-time decisions like buying or investing, business needs the latest information(e.g. Gold Rate/Stock Rate). Unlike traditional days, you need not wait for a fe…
This video shows setup options and the basic steps and syntax for duplicating (cloning) a database from one instance to another. Examples are given for duplicating to the same machine and to different machines
This video shows how to Export data from an Oracle database using the Original Export Utility.  The corresponding Import utility, which works the same way is referenced, but not demonstrated.

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

23 Experts available now in Live!

Get 1:1 Help Now