Crawl Components best practices report by SPDocKit determines whether the SharePoint 2010 Search Service Application has been properly configured.
This check determines whether the SharePoint 2010 Search Service Application has been properly configured.
The recommended limit is 16 total crawl components per application, with two per crawl database and two per server, assuming the server has at least eight processors (cores).
Make sure you do not go over the limit; if you do, reduce the number of components to remain compliant.
Additional information can be found in the following article: