How can I calculate additional number of work porcesses in SAP instance.

Hello Sir,
We have an BW server (SAP NetWeaver 2004s) OS- AIX 64 Bit, Database - Oracle 10.2.0.2 and Memory 20GB. Currently we have the work process distribution as follows,
Dialog - 11
BTC - 8
UPD - 4
UPD2 - 1
ENQ - 1
SPO - 1
Total number of wp is equal to 26.
We are facing performance issue from last few months. All dialog work processes are getting occupied and no new users are getting connection to system. We are thinking to increase number of dialog work processes.
My question is 1. How many work processes I can add more?
2. What is the procedure to calculate number of processes.
3. What memory calculations I need to consider before performing this changes.
You can also suggest any document for reference.
Regards,
Sujit

Hi,
The maximum number of work processes depends on several things like the below.
1) Majorly on Your primary Memory
2) Hardware capacity
3) Operating systems
4) SAP version as well...
You need to calculate the work processes with your primary memory.
Every work process should take 150 mb space on memory.. so you need to increase the work processes that should be campatible with your primary memory.
And please read the OSS notes as suggested by our frnds then go ahead with your rquirement.
-Srini

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