What is the difference between pooled and pooled-lo optimizers?

Question

Java

I read Hibernate pooled and pooled-lo identifier generators and Hibernate hidden gem: the pooled-lo optimizer

And I would like to clarify whether I correctly understood the differences between pooled-lo and pooled optimizer?

For example, the parameter is set increment_sizeto 50
pooled-lo: Goes to the database for the value of the sequence, receives for example 150 and generates identifier values ​​in memory for the next 50 sequences (151,152,153...,198,199,200), as soon as the values ​​are over, go to the database again to get the sequence and so on in a circle.
There is only one minus here, if an external client also reserves 50 values, but makes 5 inserts, there will be a gap of 45 values.

Did I understand everything correctly pooled-loand what is the difference from pooled?