Comments on: No of user for database http://itknowledgeexchange.techtarget.com/itanswers/no-of-user-for-database/ Sat, 25 May 2013 17:28:03 +0000 hourly 1 By: 240210 http://itknowledgeexchange.techtarget.com/itanswers/no-of-user-for-database/#comment-98982 240210 Sat, 12 Nov 2011 04:19:12 +0000 #comment-98982 I have checked application users to connect database through a form limited to 150 users.

]]> By: The Most-Watched IT Questions: May 4, 2010 - ITKE Community Blog http://itknowledgeexchange.techtarget.com/itanswers/no-of-user-for-database/#comment-76783 The Most-Watched IT Questions: May 4, 2010 - ITKE Community Blog Tue, 04 May 2010 06:31:35 +0000 #comment-76783 [...] No of user for database, asked by Akansha and answered by MrDenny, CarlosDL and Kccrosser [...]

]]> By: kccrosser http://itknowledgeexchange.techtarget.com/itanswers/no-of-user-for-database/#comment-76295 kccrosser Wed, 21 Apr 2010 18:19:31 +0000 #comment-76295 There are some practical upper limits on concurrent “connections” to the database if you are using persistent connections. Older versions of Oracle (up through 8i) would encounter serious performance problems when more than around 800 “connections” existed. Note that “connections” is a nebulous thing – depending on the application, a single end user may wind up taking multiple connections. Connection pooling and a change of architecture in 9i and later generally allows for several thousand concurrent connections without problems.

The databases can also be configured to have a maximum limit, of course.

Assuming it isn’t a configured limit, the number of concurrent users will be determined by the server resources (CPU performance, main memory, disk performance) and by the type of applications using the database.

Simple OLTP with small transactions and a single database – thousands or tens of thousands of concurrent users.
Complex OLTP with big transactions may run out of gas with hundreds of users.
Simple OLTP with small transactions, but with multiple applications using multiple databases (or different sets of tables in the same database) may have performance issues, as this can degrade the cache hits.
Weather modelling, signal processing, finite element analysis, etc. – one user might use all the resources.

]]> By: carlosdl http://itknowledgeexchange.techtarget.com/itanswers/no-of-user-for-database/#comment-76241 carlosdl Tue, 20 Apr 2010 15:06:43 +0000 #comment-76241 This is more likely going to be restricted by the available resources on the server, than by the database platform itself.

]]>