Having problem in serving concurrent users with WebSphere 1

[dineshK]

Background:-

Have developed a system using WebSphere 3.5; SQL Server 2000; I-Net Driver to connect to the database.

The AppServer resides on a 1GB RAM, Dual CPU (800MHz) machine, 60GB HardDisk.
The Database Server resides on the similar configuration.
I-Net Driver claims that it would be able to support concurrent users.

1 Entity bean and 7 Stateless Session beans are used.

Problem:-

When used with a single user, am getting a page within 2 secs. But the moment I try to get the same page with 10 users hitting the server concurrently, I am getting the same page in 15 secs.

Have checked out there is no locking on the database side.

Please help on this. The time taken increases linearly with the increase in the number of users.

 

[wushutwist]

Are you using Servlets/JSP? Are you implementing SingleThreadModel? This could severely degrade your performance.

Are there any synchronized codeblocks in your application?

Are you using any type of Connection Pooling, this would really help if you are not.

Are your EJB pools big enough?

Have you checked out the Server Performance while you are running your tests? Is it pegged out (I would highly doubt it but I thought I would ask).

What about Network Performance between the Application Server and the Database? Are these pages querying for a ton of information? Do some simple tests to make sure communication is smooth between App Server and DB Server.

So many variables it is sometimes hard to tell where the problem may be. Start methodically checking everything and I am sure you will be able to find the bottleneck.

 

[dineshK]

We had taken care of all this.
We are using JSPs and Beans for our application.