Track SQL queries that timeout - sql-server-2008

Question

Is it possible to query SQL Server 2008 R2 for a list of queries that have timedout?
I'm trying to find out which parts of our app are falling over, but for boring and bad reasons that won't get fixed, we have no application level logging.
In lieu of getting some application logging put in, how can I find out which queries are timing out?

Answer 1

to get all the time-outs you will need to use the profiler, however you can run some queries that may help:
show top 10 high CPU queries:
SELECT TOP 10
total_worker_time/execution_count AS Avg_CPU_Time
,execution_count
,total_elapsed_time/execution_count as AVG_Run_Time
,(SELECT
SUBSTRING(text,statement_start_offset/2,(CASE
WHEN statement_end_offset = -1 THEN LEN(CONVERT(nvarchar(max), text)) * 2
ELSE statement_end_offset
END -statement_start_offset)/2
) FROM sys.dm_exec_sql_text(sql_handle)
) AS query_text
FROM sys.dm_exec_query_stats
ORDER BY Avg_CPU_Time DESC
this query will show cahced query plans that "SCAN", change comments for other things, can add filters for UseCount, EstimatedCost, EstimatedCPU, Estimated Rows
;WITH XMLNAMESPACES(DEFAULT N'http://schemas.microsoft.com/sqlserver/2004/07/showplan')
, CachedPlans AS
(SELECT
RelOp.op.value(N'../../#NodeId', N'int') AS ParentOperationID
,RelOp.op.value(N'#NodeId', N'int') AS OperationID
,RelOp.op.value(N'#PhysicalOp', N'varchar(50)') AS PhysicalOperator
,RelOp.op.value(N'#LogicalOp', N'varchar(50)') AS LogicalOperator
,RelOp.op.value(N'#EstimatedTotalSubtreeCost ', N'float') AS EstimatedCost
,RelOp.op.value(N'#EstimateIO', N'float') AS EstimatedIO
,RelOp.op.value(N'#EstimateCPU', N'float') AS EstimatedCPU
,RelOp.op.value(N'#EstimateRows', N'float') AS EstimatedRows
,cp.plan_handle AS PlanHandle
,qp.query_plan AS QueryPlan
,st.TEXT AS QueryText
,cp.cacheobjtype AS CacheObjectType
,cp.objtype AS ObjectType
,cp.usecounts AS UseCounts
FROM sys.dm_exec_cached_plans cp
CROSS APPLY sys.dm_exec_sql_text(cp.plan_handle) st
CROSS APPLY sys.dm_exec_query_plan(cp.plan_handle) qp
CROSS APPLY qp.query_plan.nodes(N'//RelOp') RelOp (op)
)
SELECT
PlanHandle
,ParentOperationID
,OperationID
,PhysicalOperator
,LogicalOperator
,UseCounts
,CacheObjectType
,ObjectType
,EstimatedCost
,EstimatedIO
,EstimatedCPU
,EstimatedRows
,QueryText
FROM CachedPlans
WHERE CacheObjectType = N'Compiled Plan'
AND PhysicalOperator IN ('nothing will ever match this one!'
--,'Assert'
--,'Bitmap'
--,'Clustered Index Delete'
--,'Clustered Index Insert'
,'Clustered Index Scan'
--,'Clustered Index Seek'
--,'Clustered Index Update'
--,'Compute Scalar'
--,'Concatenation'
--,'Constant Scan'
,'Deleted Scan'
--,'Filter'
--,'Hash Match'
,'Index Scan'
--,'Index Seek'
--,'Index Spool'
,'Inserted Scan'
--,'Merge Join'
--,'Nested Loops'
--,'Parallelism'
,'Parameter Table Scan'
--,'RID Lookup'
--,'Segment'
--,'Sequence Project'
--,'Sort'
--,'Stream Aggregate'
--,'Table Delete'
--,'Table Insert'
,'Table Scan'
--,'Table Spool'
--,'Table Update'
--,'Table-valued function'
--,'Top'
)