Update Processing

An admin sets rdisp/vbdelete to 0 hoping to clean up faster — what actually happens?

Which four database tables hold the data behind the update mechanism?

You have a large backlog of incomplete update requests to clear — do you work through SM13, or is there a better tool, and what's the difference?

Why are all V1 modules of one transaction forced through a single update work process consecutively, rather than spread across several for speed?

A posting ran as an immediate (local) update and looks wrong — can you reverse it the way you would a canceled async update?

In SM14 you can deactivate update processing during troubleshooting — what's the contraindication you must respect?

BW extractions are stalling and the V3 (collective run) queue isn't draining — what's the actual cause, and why is it easy to misread in SM13?

One module inside an update request fails. Whether the rest of the request survives depends on one property — which, and how does it differ for V1 vs V2?

Why does a synchronous update hurt throughput specifically when the update server is remote?

You're sizing update processes on a new system — what starting ratio do you use, and why is it a mistake to apply that same ratio to V2?

A developer asks you to switch a transaction from deferred to synchronous updating for them. Can you, and who actually decides the method?

Is one SAP logical unit of work (LUW) the same thing as one database transaction?

SM13 shows an update was canceled but the status doesn't tell you why — where do you look next, and why isn't SM13 enough?

rdisp/vb_delete_after_execution is set to 2 on a busy system and the VB* tables keep growing — what does value 2 do versus the default?

Why can't a multi-step transaction just write each change to the database as it goes, instead of bundling them into an asynchronous update request?

A user says their posting failed — you open SM13 and see a canceled update request. What's the right move, and what's the trap?

rdisp/vb_dispatching is set to 0 and SICK now reports a severe error — what did that change actually do?

You want V2 updates running in their own work processes so heavy statistics don't delay V1 postings — what do you set, and what's the easily-missed prerequisite?

Compared with V1, what one structural difference in V2 update processing means you can't rely on it holding the original transaction's locks?

Instead of manually checking for update terminations every day, how can S/4HANA notify you of them proactively?

Classic ECC teaching says update processing is asynchronous so the user never waits. Why does S/4HANA increasingly do the opposite, and what does the user gain from it?