Easing Into Using the New AutoStats Feature - comment by carrie

 
An EventType of ‘U’ indicates an existing collected statistic was observed as being Used during query optimization as recorded by the DBQL STATSUSAGE logging option.  When related column NeedsAutomation is set to ‘Y’,  the used statistic has not yet been automated and thus is not considered by AutoStats Collect Jobs.  Stats falling into this category are reported as Automate recommendations by Analyze Jobs as described in section 6.1 of the AutoStats Orange Book.
 
In terms of your second question:  There is no documentation that carries expected values and their interpretation for the StatsTbl and the AnalyzerHistoryTbl.  Although the TDStats APIs (stored procedure definitions) are documented in the user manuals, the TDStats table schema is not.
 
Detailed knowledge of the underlying TDStats repository has not been considered to be necessary for those users who use the Stats Manager portlet.
 
Thanks, -Carrie