System counts in sys.dm_db_index_usage_sats

Hi,

I currently examine the user counts that sys.dm_db_index_usage_stats provides for our tables/indexes on our Production systems to see what indexes actually get used and which ones have high overhead etc. I am starting to look at the system counts as well and have only seen one explanation of what operations update these counters. It mentioned automatic stats operations. As we have both Auto Create and Auto Update Stats set to ON I can see that these system operations would update the system counters. What other system operations update these counters?

Thanks

Chris