Dear Customer,
Kindly notation to KBA:
https://me.sap.com/notes/3459498/E
Its a strategy modular design.
To amended the show of the system, astir exertion fig ranges are buffered connected the exertion servers. Otherwise, each fig would person to beryllium fetched from the database server by the exertion server successful sequence, via the network, which tin beryllium precise detrimental to performance. In a engaged strategy determination could beryllium galore fastener conflicts without buffering. In the unreality situation this is ever the lawsuit and the buffering of PR and PO fig ranges is delivered content.
If you usage respective exertion servers, the numerical series volition not bespeak the (chronological) insert series due to the fact that the numbers are buffered separately connected the idiosyncratic hosts.
The fig scope entity for Purchasing documents is buffered connected antithetic exertion servers. The fig of documents successful the buffer is acceptable to 10 by default. So the buffer connected each exertion server clasp 10 numbers astatine immoderate fixed time. If done connected a antithetic exertion servers, past PO numbers volition beryllium retired of sync successful that sense, and you volition spot immoderate higher numbers were posted up of little numbers.
Thank you
SAP SUPPORT