Thread:User talk:MWJames/Search results sorting/reply (3)

For us the incremental index is just a temporary index that contains the last 12 hours of changed content. To avoid a main re-indexing (happen once a month for 2GB wiki db) the merge process is running every 6th hour to store the delta in the main index. The IO for the merge process might be higher but it is relatively fast and does have only a minimal impact on the server workload.