block contention

Posted on 2013-09-02
Medium Priority
Last Modified: 2013-09-18
What is actually block contention?

In simple words..
Question by:jcob_l
LVL 20

Expert Comment

ID: 39458853
That occurs when two or more tasks (one could be yours, and another task someone else is running) are waiting on the same area of data, even if it's in memory. Many times this happens because the query may be going across an entire table, perhaps updating many rows, and someone else's query is waiting on it to release that segment of data.

In SQL Server they are called deadlocks.
LVL 28

Accepted Solution

Naveen Kumar earned 2000 total points
ID: 39459412
to keep it very simple --> set of bytes in your data files of the database - referrred to as a block in oracle database.  One or more database sessions/processess trying/waiting to read/write to the same block will cause contention.

if you are interested for more info. then refer to :


Author Closing Comment

ID: 39503780
got it

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Introduction A previously published article on Experts Exchange ("Joins in Oracle", http://www.experts-exchange.com/Database/Oracle/A_8249-Joins-in-Oracle.html) makes a statement about "Oracle proprietary" joins and mixes the join syntax with gen…
How to Create User-Defined Aggregates in Oracle Before we begin creating these things, what are user-defined aggregates?  They are a feature introduced in Oracle 9i that allows a developer to create his or her own functions like "SUM", "AVG", and…
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.
This video explains what a user managed backup is and shows how to take one, providing a couple of simple example scripts.

624 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