Indexing information can place a large load on the local SQL Server database and might slow down the responsiveness of the ...

Indexing information can place a large load on the local SQL Server database and might slow down the responsiveness of the local SharePoint sites. However, reducing the maximum allowed indexing activity will slow down the speed at which items are indexed, and therefore might cause search results to be outdated. Use information about the local server load to select the appropriate indexer performance level.