Exclude old orders from search index?

Questions
1

To improve perfomance when searching for orders and reduce index size,
is it possible to only include orders from for example the last two years in lucene index?

Can we modify the indexing job to achieve this?

Litium version: 7.7.9

2

Do you need to keep order older than 2 years in the database?

3

At the moment, yes.