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Message |
Keith_Walton
Joined: 12 Jun 2006
Posts: 17
Location: Sacramento CA
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 Posted: Tue May 10, 2011 4:26 pm Post subject: How do I get a blocked index name for a deadlock? |
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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
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Keith Walton
Chief Software Architect
NHXS |
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Chris Spencer
Joined: 29 Aug 2006
Posts: 300
Location: Red Gate - Cambridge
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| Posted: Wed May 11, 2011 1:40 pm Post subject: |
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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/354035/sql-server-deadlock-object-ids-are-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 )
| Code: |
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
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Chris Spencer
Test Engineer
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Keith_Walton
Joined: 12 Jun 2006
Posts: 17
Location: Sacramento CA
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| Posted: Wed May 11, 2011 6:54 pm Post subject: |
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I got it to work. I had to join in sys.indexes to get index name:
| Code: |
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
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Keith Walton
Chief Software Architect
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Chris Spencer
Joined: 29 Aug 2006
Posts: 300
Location: Red Gate - Cambridge
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| Posted: Thu May 12, 2011 11:25 am Post subject: |
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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
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Chris Spencer
Test Engineer
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