I'm trying to look at deadlocks on a troublesome server, and when I look at the system_health xel file, I see 80 records for "xml_deadlock_report" in about 16 hours. I assume these are all different deadlocks?
Perfmon and system_health don't really seem to match up.
- which is more reliable, perfmon deadlocks/sec (hours * 60 * 60) * deadlocks/sec = @ 4000 or the 80 rows in the xml deadlock report? (I'm viewing the system_health xel via enterprise manager 2014)
- is my method for the math totally wrong? I realize it is a generalization, but, really...that's a lot.
SQL 2012 Standard Edition Windows 2012
I'm also using the following from Jon Kehayias http://www.sqlservercentral.com/articles/deadlock/65658/
but it doesn't give me the time, and although the post is old I imagine it is pulling from the same .xel file as the system_diag so is missing events (as he mentions, if I'm reading his posts correctly)