sp_flushstats will Flushes the in-memory table and index statistics that are stored in the DES/IDES to the system table sybtabstats.
you can check statmoddate column of systabstats system table to know last time executed 'sp_flushstats' !!
For example:
I executed 'sp_flushstats' on Aug 7 2013 11:04AM,
I can query systabstats system table and get confirmation information as following:
1> select id, substring(object_name(id),1,30) , statmoddate from systabstats where indid = 0 and statmoddate > '20130807'
2> go
id statmoddate
----------- ------------------------------ -------------------------------
1 sysobjects Aug 7 2013 11:04AM
2 sysindexes Aug 7 2013 11:04AM
3 syscolumns Aug 7 2013 11:04AM
5 sysprocedures Aug 7 2013 11:04AM
6 syscomments Aug 7 2013 11:04AM
9 sysprotects Aug 7 2013 11:04AM
12 sysdepends Aug 7 2013 11:04AM
23 systabstats Aug 7 2013 11:04AM
24 sysstatistics Aug 7 2013 11:04AM
28 syspartitions Aug 7 2013 11:04AM
(10 rows affected)
HTH ! Thanks !
Regards,
Robert