No of DIA and BTC Processes

[Former Member]

Hi All,

can any body please explain how to decide the no of work processes (DIA and BTC) and buffer sizes depending on no of users and RAM.

please help coz system performance is very slow.

Thanks

Zeeshan

[Former Member]

Hi Zeeshan,

The number of work processes is determined by two factors:

1. Usage of the system

2. Available hardware.

I mean in order to sustain the performance of a system with large number of users you may need greater number of workprocesses but at the sametime you cannot increase the total number of workprocesses to any number of your choice since it depends of your hardware specifically memory. Every WP consumes memory on your application server as well as DB server.

Coming back to workprocess distribution there are few useful recommendations that SAP makes.

1. The number of dialog process should be atleast equal or more than the combined number of other work processes i.e equal to or more than 50% of total work processes during daytime.

2. As suggested by Sunil number of dialog processes in daytime should be more in daytime while the number of background processes should be greater at night. This you can control through operation mode switch.

3. Also configuration of number of background workprocesses with job class A needs to be done carefully. At times of high load the number can be decreased.

4. The other work processes also need to be configured as per the requirement.

Check this lin also:

http://help.sap.com/saphelp_nw2004s/helpdata/en/c4/3a5ef8505211d189550000e829fbbd/content.htm

Regards.

Ruchit.

[Former Member]

This is depends on your system capacity and also how much users you have. you should have more DIA processes in day and more BTC in night. in day users will execute report and do their daily business related tasks thats why you should have more DIA. In night users may schedule backgroud jobs to get daily/weekly reports. if you have 20 WPs in that you can have 11 DIA, 4 BTC, 1 SPO, 2 updates, 1 ENQ, 1 UP2

Cheers,

-Sunil

[Former Member]

Hi Zeeshan,

You can find many documents regarding this in marketplace service.sap.com/notes. Just search through the keyword "SAP Memory Management".

Regards,

Abhishek

[Former Member]

Hi Ahmed,

Each work process use 150MB space and each dialog process can cater the 5 - 7 user's and you can make the optimum utilization of workprocess thru the operation modes i.e., keep the dialog process more during the peak hours and change the some of the dialog process into background work processes during the off-peak hours.. This helps your system performance.

Regards,

Ashok