是否应该在Lucene的增量索引之后优化索引？

We run full re-indexes every 7 days (i.e. creating the index from scratch) on our Lucene index and incremental indexes every 2 hours or so. Our index has around 700,000 documents and a full index takes around 17 hours (which isn't a problem).We run full re-indexes every 7 days (i.e. creat