Indexing Service is no longer supported as of Windows XP and is unavailable for use as of Windows 8. Instead, use Windows Search for client side search and Microsoft Search Server Express for server side search.
The MinIdleRequestThreads entry is the minimum number of idle threads that must be kept available to process incoming requests to Indexing Service.
|Range:||0 - 1000|
Request types include queries, query result retrievals, and administrative operations.
The value of an identically named entry under the Catalog subkey for a specific catalog cannot override the value of this entry.