Convert TimeStamp In dm_os_ring_buffers I see this conversion a lot when trying to convert this to a legitimate time:

SELECT DATEADD (ms, -1 * ((s.cpu_ticks) - r.[timestamp]), GETDATE())
FROM sys.dm_os_ring_buffers r
                CROSS JOIN sys.dm_os_sys_info s


I get the error:


  Arithmetic overflow error converting expression to data type int.


What's the correct formula for converting this?

Answer:ms_ticks
See the SQL Server 2008 calculation in this article. It applies to 2012, 2014 and 2016 too.

cpu_ticks is what was used in SQL Server 2005.

declare @ts_now bigint 

select @ts_now = ms_ticks from 

sys.dm_os_sys_info 

select record_id, dateadd (ms, (y.[timestamp] -@ts_now), GetDate())
...