When a table is modified as the result of an append or update, all
SPD Server indexes on the table are updated. When the index is updated, the per-value segment
lists can potentially fragment or some disk space might be wasted. A highly fragmented
server index can negatively impact the performance of queries that use the index.
You can reorganize server indexes to eliminate fragmentation and reclaim wasted disk
space by using the ixutil utility program.
For more information, see Index Utility.