Dialog work process

[former_member182921]

Hi SAP Experts,

If we have 20 dialog work process in SAP .

Then does it mean that if 20 people will login then there will be no  DIA work process available ???

Regards,

Abhishek

[Former Member · Accepted solution]

Hi Abhishek,

The answer to your question is NO, because it's not a 1-to-1 relationship between DIA workprocess and user. One DIA workprocess can handle multiple users by switching between the context of those users. This is also because one user will not occupy a DIA workprocess 100% all the time, unless it goes to "private mode", which is seldom the case (if it's happened, then the user should probably using BACKGROUND workprocess anyway). So the user will not produce continuous "dialog-steps" in a normal working mode.

The Dispatcher handles all the request of all users and put them in the Dispatcher-queue, and this will be forwarded to a DIA workprocess as soon as it became idle, even in milliseconds, so that's why it can handle hundreds of requests in this queue.

I hope this will help you.

Regards,

Andre

[Former Member]

Hi Abhishek,

To add on to Wahjudi's response. This behavior of the work processes are known as "multiplexing". Where if a transaction/report requires multiple sub programs/transactions to execute, each sub program could potentially be using different dialog WP's to complete the entire final transaction/report. Thus it is not a 1 - 1 relationship.

Thusjanthan Kubendranathan

[divyanshu_srivastava3]

Hi Abhishek,

You should check the architecture of SAP again.

There is something called dispatcher.

Go through it, an you will get the answer .

Regards,

Divyanshu

[former_member182921]

Yes Divyanshu Thanks

[divyanshu_srivastava3]

In Short, all client request goes to the queue, are processed and forwarded by dispatcher to its work processes using FIFO principle.

Regards,

Divyanshu

[divyanshu_srivastava3]

Hi Abhishek,

Point to note is the parameter rdisp/elem_per_queue.

If you got your answers, please mark and close the thread

Regards,

Divyanshu