How do I get a blocked index name for a deadlock?

Keith_Walton

Example:

Object blocked: Index/(Key) 72057618332712960

Process detail:
dbid: 8, object id: 72057618332712960, index id: (010086470766)


Both of these numbers are too long to be the object_id (INT) in sys.all_objects

Chris Spencer

Hi Keith

We get this value directly from the SQL Server error log. I've investigated why the value is so long and the best explanation I've come up with so far is here:

http://stackoverflow.com/questions/3540 ... -too-large

This seems to suggest that the values are hobt rather than object ids.

It might be worth doing as that page suggests and run the following inside the relevant database (id = 8 )

SELECT hobt_id, object_name(p.[object_id]), index_id 
FROM sys.partitions p 
WHERE hobt_id = 72057618332712960

This isn't working for me at the moment, but it'd be interesting to see if it works for you.

Regards
Chris

Keith_Walton

I got it to work. I had to join in sys.indexes to get index name:

SELECT name FROM master..sysdatabases WHERE dbid = 8

USE support
GO


SELECT 
	object_name(partitions.object_id)	AS [Table], 
	indexes.name				AS [Index]

FROM 
	sys.partitions				AS partitions

	INNER JOIN
	sys.indexes				AS indexes
	ON partitions.object_id			= indexes.object_id

WHERE 
	hobt_id					= 72057618332712960

It would be cool if SQL Monitor would do this automatically.

Thanks

Chris Spencer

Hi Keith

Yes that seems to do the trick!!

As deadlock alerting is a very important part of SQL Monitor, I've raised a few enhancements requests and bug reports.

SRP-4174 : Enhancement that you have requested here to get the values auto-decoded into something more meaningful.

SRP-4175 : Bug report as we are misleading users by suggesting that some value is an object id when it is in fact a hobt id.

SRP-4176 : A more comprehensive enhancement request suggesting that we move to using trace flag 1222 rather than 1204. (1204 is required for SQL Server 2000 support but I can imagine it's possible to use one or the other when appropriate). 1222 gives far better information.

Regards
Chris