When the sequence is set to [50] in the entity mapping, it means that each time a new record is inserted into the associated database table, the sequence will be incremented by 50. This value is specified to optimize performance by reducing the number of times the database needs to generate a new sequence value.
For example, suppose we have a table called “employees” with an ID column that uses a sequence. If the sequence is set to [50], then the first record inserted into the table will have an ID of 1, the second record will have an ID of 51, the third record will have an ID of 101, and so on.
This increment size of [1] means that even though the sequence is incremented by 50, each individual record will only be incremented by 1. This allows for a larger range of possible IDs without the risk of duplication or gaps between IDs.