Does pure activation of BCT DataSources decrease performance?

Question

Hello,
if I just activate (all) datasources from BCT in an ECC system (without actually using them for data uploading to BW), does this decrease any performance in the ECC? Or is it performance wise neutral as the activation only creates some metadata?
Full points will be assigned!
Thanks a lot,
German

Answer 1

Hi,
keep in mind, that the Data for BW is taken out of the DeltaQueue.
Before the Data achieves the Deltaqueue it is either stored in VBDATA or else in another QRFC-Queue (I call it extraction queue). From where its coming into the Deltaqueue is controlled by the method maintained in the logistics-extractor.
The VBDATA is the table where ALL POSTING RECORDS ARE STORED!
So when you have activated the extractors for logisitcs, all posts of documents in the system (e.g. Sales docs ...) run through the VBDATA as well as the V3-Posts of these documents for R/3.
If the V3-Programs are not scheduled, there will be an overflow to the table and the system is dead, means none can post any documents.
This can only occur if unseralized V3 is chosen.
Delta Queued writes data into the QRFC-Queue.
As long as you haven't run the V3-Programm it will stay there.
The V3-Programm takes the data and writes it to the DeltaQueue for BW.
If no successful init has taken place, the data is gone then.
The request from BW only takes the data out of the delta queue, not out of the extraction queue I've descirbed earlier.
Cheers
Sven