Question

I use Hibernate on my Java project, I have Oracle DB. An ID column, I identified a sequence with increment 1. But this is how JPA/Hibernate gets nextVal from the sequence:

1   1451
2   1450
3   1402
4   1401
5   1400
6   1352
7   1351
8   1350
9    426

You can see that nextVal sometimes get 1, but mostly 50 or more. I see even the start of a sequence 200 even though I put the start value 1. Why is this happening? Is this normal?

Can I reduce this “50” increment somehow?

Edit: Duplicate of hibernate oracle sequence produces large gap

Answer 1

I found this solution;

1. I made sequence cache as “no-cache”
2. I put “allocationSize=1” to annotation @SequenceGenerator of @Id property as it was described here: https://stackoverflow.com/a/5346701/169534

Problem resolved