Thomas, > I once run a test with insertion performance in Firebird 2.5 with a) > sequential PK values coming from a generator and b) via the built-in > function giving me a UUID.
reversed UUIDs, by putting the fixed part at the front, should perform better in this regard than plai UUID. I don't know if the function you have used generates that kind of UUID. I know that I once used a UDF that did that and performance was better than with (at the time, client-generated) UUIDs. High/Low is also good, as huge batch of inserts would inherently use sequential IDs, but this requires a little more setup. -- Nando Dessena
