Rails: Is object creation a step to update the "id" column?

Question

Ruby on Rails

Actually here.
When creating a new record in the table, its id changes not from 1 to 2, 3, 4, etc., but to 11, 21, 31, 41, etc.
I don't understand what could be the issue.
Can someone come across a similar one and can tell in which direction to dig?

Answer 1

Found the answer somewhere on the Internet:
i have experience use ClearDB on Heroku.
- default mysql engine is MyISAM. if you want another engine, modify migration file.
- default charset is ascii. if you want utf-8, modify migration file
i use ClearDB for personal project so don't know about performance.

Answer 2

in the muscle config look for the line
auto-increment-increment = 10