Too many index stripes can eventually cause a bottleneck; therefore, you periodically should unify the stripes into a single stripe.
Unifying an index stripe
From the Document Stores page, select a document store and click Index Information.
Click Unify Indexes. The unification process runs. Sybase Search displays the progress of the unification process. Additionally, the unification process purges data marked for deletion and defragments the indexed data structures.