Can we write a maintenance which updates DB without affecting logged in users?
I can see AmazonImportOrdMn() calls qupdating procedure.
Also I can see some threadasync calls in NexmoSIPTrunkNSMn().

Should threadasync calls work better (not affect the work of logged in users) if the maintenance is deleting a million(s) of old RHistVc records for about an hour or more?