Buffering FTR indexing improves performance when you add more than 500 objects to a collection. The index for the new objects is stored in a buffer file during the load operation. After the load operation, use the SearchServer Administrator Manual Indexing feature to integrate the buffer file into the collection.
To buffer FTR indexing, edit the site.cfg file on the host where FTR Interface is installed. To cause FTR indexing to buffer (but not be turned off completely), edit the following line in the Directa site.cfg file:
Ftrisvr “1111110 $(@FILEPATH:q $(PDM_BIN:q) ftridx) -o - C 250”
The -o option causes FTR indexing to still occur, but it is buffered instead of being added to the collection.