Note 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 MaxSimultaneousRequests entry is the maximum number of simultaneous connections for query requests (using named pipes) that Indexing Service supports.
|Range:||1 - 20000|
The value of this entry should be at least as large as the value of the IsapiMaxEntriesInQueryCache entry, because cached queries keep a connection open for incoming search requests. No more than 50 simultaneous requests can be established because of connection limits in the system.
The value of an identically named entry under the Catalog subkey for a specific catalog cannot override the value of this entry.
Build date: 9/10/2012