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dbo.sp_PerfSQ.sql
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IF OBJECT_ID('dbo.sp_PerfSQ', 'P') IS NULL EXECUTE('CREATE PROCEDURE dbo.sp_PerfSQ AS SELECT 1');
GO
ALTER PROCEDURE dbo.sp_PerfSQ(
@ParamSniff float = NULL
, @SessionLocks bit = NULL
)
AS
/*
-----------------------------------------------------------------------------------------
https://www.sqlservercentral.com/articles/query-performance-diagnostics-with-sp_perfsq
-- sp_PerfSQ: Query Shaping tool identifying Performance features of active SQL Queries
-- Copyright (C) 2018, 2019 Edward Haynes
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU Lesser General Public License as published
-- by the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU Lesser General Public License for more details.
--
-- You should have received a copy of the GNU Lesser General Public License
-- along with this program. If not, see <https://www.gnu.org/licenses/>.
--
--
-- Stored procedure designed to work with SQL Server 2008 R2 and higher
-- providing on-demand performance detail from DMVs for queries with executing requests
--
-- Optional Parameters:
-- @ParamSniff = Parameter Sniffing sensitivity multiplier
-- < 1.0 (more hits); 1 or NULL (DEFAULT); > 1.0 (less hits)
-- Must be within the range of 0 to 2.0 otherwise will default to 1.0
--
-- @SessionLocks = 0 or NULL -- No locking detail (DEFAULT)
-- = 1 -- Detailed locking (performance overhead)
--
-- Example Usage:
-- EXEC dbo.sp_PerfSQ
-- GO
--
-- EXEC dbo.sp_PerfSQ @ParamSniff=0.75, @SessionLocks=1
-- GO
--
-- Email: [email protected]
--
*/
BEGIN
SET NOCOUNT ON;
DECLARE @Version nvarchar(20);
SET @Version = N'4.5.17';
DECLARE @tmpSchedulers TABLE (RunnableCountAvg int NULL, PendingIOCountAvg int NULL, ThreadShortageAvg int NULL, CPUAllocation nvarchar(50) NULL);
DECLARE @ProcessMemLow int,
@SystemMemLow int,
@MaxServerMemory int,
@PhysicalMemory bigint,
@PhysicalMemInUse bigint,
@KernelNonPaged bigint,
@RunnableCountAvg int,
@PendingIOCountAvg int,
@ThreadShortageAvg int,
@CPUAllocation nvarchar(50),
@VerCleanupRatio float,
@Runtime datetime,
@CmdLine nvarchar(100),
@SQLVersion nvarchar(500) ;
SET @ParamSniff = (CASE WHEN @ParamSniff < CONVERT(float,0.0) OR @ParamSniff > CONVERT(float,2.0) THEN CONVERT(float,1.0) ELSE ISNULL(@ParamSniff,CONVERT(float,1.0)) END);
SET @SessionLocks = ISNULL(@SessionLocks,CONVERT(bit,0)) ;
SET @CmdLine = N'EXEC sp_PerfSQ ' + N'@ParamSniff=' + CONVERT(nvarchar(20),@ParamSniff) + N', @SessionLocks=' + CONVERT(nvarchar(1),@SessionLocks) + N' --v' + @Version;
SET @Runtime = GETDATE();
SET @SQLVersion = CONVERT(nvarchar(500),@@Version);
SET @SQLVersion = LEFT(@SQLVersion,CHARINDEX(N'COPY',UPPER(@SQLVersion)) - 1);
SET @ProcessMemLow =
(SELECT COUNT(1)
FROM sys.dm_os_process_memory WITH (NOLOCK)
WHERE process_physical_memory_low = CONVERT(bit,1)) ;
SET @SystemMemLow =
(SELECT COUNT(1)
FROM sys.dm_os_sys_memory WITH (NOLOCK)
WHERE system_high_memory_signal_state = CONVERT(bit,0)
AND system_low_memory_signal_state = CONVERT(bit,1)) ;
SET @MaxServerMemory =
(SELECT top 1 CONVERT(int,value_in_use)
FROM sys.configurations WITH (NOLOCK)
WHERE [name] = 'max server memory (MB)') ;
SET @PhysicalMemory =
(SELECT top 1 total_physical_memory_kb / 1024
FROM sys.dm_os_sys_memory WITH (NOLOCK)) ;
SET @PhysicalMemInUse =
(SELECT top 1 physical_memory_in_use_kb / 1024
FROM sys.dm_os_process_memory WITH (NOLOCK)) ;
SET @KernelNonPaged =
(SELECT top 1 kernel_nonpaged_pool_kb / 1024
FROM sys.dm_os_sys_memory WITH (NOLOCK)) ;
INSERT INTO @tmpSchedulers (RunnableCountAvg, PendingIOCountAvg, ThreadShortageAvg, CPUAllocation)
SELECT AVG(os.runnable_tasks_count) as RunnableCountAvg,
AVG(os.pending_disk_io_count) as PendingIOCountAvg,
AVG(os.work_queue_count) as ThreadShortageAvg,
CONVERT(nvarchar(20),COUNT(1)) + N' of ' + CONVERT(nvarchar(20),SUM(CONVERT(int,os.is_online)))
as CPUAllocation
FROM sys.dm_os_schedulers os WITH (NOLOCK)
WHERE os.scheduler_id < 1048576 ;
SET @RunnableCountAvg =
(SELECT top 1 RunnableCountAvg
FROM @tmpSchedulers) ;
SET @PendingIOCountAvg =
(SELECT top 1 PendingIOCountAvg
FROM @tmpSchedulers) ;
SET @ThreadShortageAvg =
(SELECT top 1 ThreadShortageAvg
FROM @tmpSchedulers) ;
SET @CPUAllocation =
(SELECT top 1 CPUAllocation
FROM @tmpSchedulers) ;
SET @VerCleanupRatio =
(SELECT top 1 CONVERT(float,(cntr_value/1024.0) * 100.0)
FROM sys.dm_os_performance_counters WITH (NOLOCK)
WHERE counter_name = N'Version Cleanup rate (KB/s)'
AND 0 < CHARINDEX(N'Transactions',[object_name])) / (SELECT top 1 CONVERT(float,cntr_value/1024.0)
FROM sys.dm_os_performance_counters WITH (NOLOCK)
WHERE counter_name = N'Version Generation rate (KB/s)'
AND 0 < CONVERT(float,cntr_value/1024.0)
AND 0 < CHARINDEX(N'Transactions',[object_name])) ;
PRINT @CmdLine ;
PRINT N''
PRINT @SQLVersion
PRINT N'Memory'
PRINT N' Total Physical Memory : ' + CONVERT(nvarchar(20),@PhysicalMemory) + N' MB'
PRINT N' Max SQL Server Memory : ' + CONVERT(nvarchar(20),@MaxServerMemory) + N' MB'
PRINT N' Physical Memory In Use: ' + CONVERT(nvarchar(20),@PhysicalMemInUse) + N' MB' + (CASE WHEN (@ProcessMemLow + @SystemMemLow) > 0 THEN N' (memory pressure)' ELSE N'' END)
PRINT N' Kernel Non-Paged Pool : ' + CONVERT(nvarchar(20),@KernelNonPaged) + N' MB'
PRINT N'Schedulers'
PRINT N' Avg CPU Queue Length : ' + CONVERT(nvarchar(20),@RunnableCountAvg)
PRINT N' Avg IO Pending Count : ' + CONVERT(nvarchar(20),@PendingIOCountAvg)
PRINT N' Avg Thread Shortage : ' + CONVERT(nvarchar(20),@ThreadShortageAvg)
PRINT N' CPU Allocation : ' + @CPUAllocation
PRINT N'Version Store'
PRINT N' Version Cleanup Ratio : ' + ISNULL(CONVERT(nvarchar(20),CONVERT(numeric(16,2),@VerCleanupRatio)) + N'%',N'NA')
PRINT N''
;WITH XMLNAMESPACES(DEFAULT N'http://schemas.microsoft.com/sqlserver/2004/07/showplan'),
cteQRequests (SPID,DatabaseName,[Status],RuntimeSec,BlockedBy,DatabaseMaint,EstFinishTime,MemRequestMB,MemGrantMB,MemGrantWait,DOP,query_cost,PAGEIOLATCHms,PAGELATCHms,RunnableCount,SpinLoopFlag,ThreadShortageFlag,ProgramName,OriginalLogin,sql_handle,statement_start_offset,statement_end_offset,plan_handle)
AS (SELECT r.session_id as SPID,
DB_NAME(s.database_id) as DatabaseName,
(CASE UPPER(r.[status])
WHEN N'BACKGROUND' THEN CONVERT(int,1)
WHEN N'RUNNING' THEN CONVERT(int,2)
WHEN N'RUNNABLE' THEN CONVERT(int,3)
WHEN N'SLEEPING' THEN CONVERT(int,4)
WHEN N'SUSPENDED' THEN CONVERT(int,5)
ELSE CONVERT(int,NULL)
END) as [Status],
CONVERT(int,r.total_elapsed_time / 1000)
as RuntimeSec,
(CASE WHEN r.blocking_session_id = 0 THEN CONVERT(smallint,NULL) ELSE r.blocking_session_id END)
as BlockedBy,
r.command as DatabaseMaint,
r.estimated_completion_time as EstFinishTime,
CONVERT(float,m.requested_memory_kb / 1024.0)
as MemRequestMB,
CONVERT(float,m.granted_memory_kb / 1024.0)
as MemGrantMB,
(CASE WHEN m.session_id = r.session_id AND m.request_id = r.request_id AND m.grant_time IS NULL THEN CONVERT(int,1) ELSE CONVERT(int,0) END)
as MemGrantWait,
m.dop as DOP,
m.query_cost as query_cost,
(CASE WHEN r.wait_type LIKE N'PAGEIOLATCH_%' THEN r.wait_time ELSE CONVERT(int,NULL) END)
as PAGEIOLATCHms,
(CASE WHEN r.wait_type LIKE N'PAGELATCH_%' THEN r.wait_time ELSE CONVERT(int,NULL) END)
as PAGELATCHms,
st.RunnableCount as RunnableCount,
st.SpinLoopFlag as SpinLoopFlag,
st.ThreadShortageFlag as ThreadShortageFlag,
s.[program_name] as ProgramName,
s.original_login_name as OriginalLogin,
r.sql_handle,
r.statement_start_offset,
r.statement_end_offset,
r.plan_handle
FROM sys.dm_exec_requests r
LEFT JOIN sys.dm_exec_sessions s WITH (NOLOCK)
ON s.session_id = r.session_id
LEFT JOIN sys.dm_exec_query_memory_grants m WITH (NOLOCK)
ON m.session_id = r.session_id
AND m.request_id = r.request_id
LEFT JOIN (SELECT ot.session_id,
MAX((CASE WHEN ot.task_state = N'RUNNABLE'
THEN os.runnable_tasks_count
ELSE CONVERT(int,0)
END)) as RunnableCount,
MAX((CASE WHEN ot.task_state = N'SPINLOOP'
THEN CONVERT(int,1)
ELSE CONVERT(int,0)
END)) as SpinLoopFlag,
MAX((CASE WHEN ot.task_state = N'PENDING'
THEN CONVERT(int,1)
ELSE CONVERT(int,0)
END)) as ThreadShortageFlag
FROM sys.dm_os_schedulers os WITH (NOLOCK)
INNER JOIN sys.dm_os_tasks ot WITH (NOLOCK)
ON ot.scheduler_id = os.scheduler_id
AND ot.task_state IN (N'RUNNABLE',N'SPINLOOP',N'PENDING')
AND ot.scheduler_id < 1048576
GROUP BY ot.session_id) st
ON st.session_id = r.session_id
WHERE r.database_id <> 32767
AND r.session_id > 0
AND r.session_id <> @@SPID
AND r.sql_handle = (SELECT top 1 r2.sql_handle
FROM sys.dm_exec_requests r2 WITH (NOLOCK)
WHERE r2.session_id = r.session_id
ORDER BY r2.start_time DESC)
AND r.statement_start_offset = (SELECT top 1 r3.statement_start_offset
FROM sys.dm_exec_requests r3 WITH (NOLOCK)
WHERE r3.session_id = r.session_id
AND r3.sql_handle = r.sql_handle
ORDER BY r3.start_time DESC)
),
cteSLocks (SPID,SessionLocks)
AS (SELECT qr.SPID,
CONVERT(nvarchar(max),ISNULL(
STUFF((SELECT N',' + ISNULL(CONVERT(nvarchar(200),tl.request_mode + N' (' + tl.request_status + N':' + tl.resource_type
+ (CASE tl.resource_type
WHEN N'DATABASE' THEN N':' + ISNULL(DB_NAME(tl.resource_database_id),N'')
WHEN N'OBJECT' THEN N':' + ISNULL(OBJECT_NAME(tl.resource_associated_entity_id,tl.resource_database_id),N'') + ISNULL(N'[' + CONVERT(nvarchar(10),i.UnusedIndexCount) + N']',N'')
ELSE N''
END) + N')') + N'x' + CONVERT(nvarchar(10),COUNT(1)),N'')
FROM sys.dm_tran_locks tl WITH (NOLOCK)
OUTER APPLY (SELECT ius.database_id,
ius.[object_id],
COUNT(1) as UnusedIndexCount
FROM sys.dm_db_index_usage_stats ius WITH (NOLOCK)
WHERE ius.database_id = tl.resource_database_id
AND ius.[object_id] = tl.resource_associated_entity_id
AND ius.user_updates > (ius.user_seeks + ius.user_lookups + ius.user_scans)
AND tl.resource_type = N'OBJECT'
GROUP BY ius.database_id,
ius.[object_id]) i
WHERE tl.request_session_id = qr.SPID
AND N'NULL' <> ISNULL(tl.request_mode,N'NULL')
GROUP BY CONVERT(nvarchar(200),tl.request_mode + N' (' + tl.request_status + N':' + tl.resource_type
+ (CASE tl.resource_type
WHEN N'DATABASE' THEN N':' + ISNULL(DB_NAME(tl.resource_database_id),N'')
WHEN N'OBJECT' THEN N':' + ISNULL(OBJECT_NAME(tl.resource_associated_entity_id,tl.resource_database_id),N'') + ISNULL(N'[' + CONVERT(nvarchar(10),i.UnusedIndexCount) + N']',N'')
ELSE N''
END) + N')')
FOR XML PATH('')),1,1,N''),N''))
as SessionLocks
FROM (SELECT SPID FROM cteQRequests WHERE @SessionLocks = CONVERT(bit,1) GROUP BY SPID) qr
),
cteTempdb (SPID,TempdbWaitms,CursorOpen,CursorDormantms,TempdbDeallocMB,TempdbAllocMB,VerActive,VerDuration)
AS (SELECT qr.SPID,
(SELECT MAX(wt.wait_duration_ms)
FROM sys.dm_os_waiting_tasks wt WITH (NOLOCK)
WHERE wt.session_id = qr.SPID
AND wt.wait_type LIKE 'PAGE%LATCH_%'
AND wt.resource_description LIKE CONVERT(nvarchar(10),DB_ID(N'tempdb')) + N':%')
as TempdbWaitms,
(SELECT COUNT(1)
FROM sys.dm_exec_cursors (qr.SPID)
WHERE is_open = CONVERT(bit,1))
as CursorOpen,
(SELECT MAX(dormant_duration)
FROM sys.dm_exec_cursors (qr.SPID)
WHERE is_open = CONVERT(bit,1))
as CursorDormantms,
(SELECT CONVERT(float,SUM(tsu.internal_objects_dealloc_page_count + tsu.user_objects_dealloc_page_count) / 128.0)
FROM tempdb.sys.dm_db_task_space_usage tsu WITH (NOLOCK)
WHERE tsu.session_id = qr.SPID)
as TempdbDeallocMB,
(SELECT CONVERT(float,SUM(tsu.internal_objects_alloc_page_count + tsu.user_objects_alloc_page_count) / 128.0)
FROM tempdb.sys.dm_db_task_space_usage tsu WITH (NOLOCK)
WHERE tsu.session_id = qr.SPID)
as TempdbAllocMB,
(SELECT COUNT(1)
FROM sys.dm_tran_active_snapshot_database_transactions v WITH (NOLOCK)
WHERE v.session_id = qr.SPID
AND v.commit_sequence_num IS NULL)
as VerActive,
(SELECT MAX(v.elapsed_time_seconds)
FROM sys.dm_tran_active_snapshot_database_transactions v WITH (NOLOCK)
WHERE v.session_id = qr.SPID
AND v.commit_sequence_num IS NULL)
as VerDuration
FROM cteQRequests qr
GROUP BY qr.SPID
),
cteQPlan (plan_handle,PlanType,ObjectName,ParameterList,Cardinality,[AvgMissingIndex%],SortRows,TableScanRows,MissingJoin)
AS (SELECT qr.plan_handle,
(SELECT top 1 RTRIM(cp.objtype)
FROM sys.dm_exec_cached_plans cp WITH (NOLOCK)
WHERE cp.plan_handle = qr.plan_handle)
as PlanType,
CONVERT(nvarchar(129),ISNULL(N':' + OBJECT_NAME(qp.objectid,qp.dbid),N''))
as ObjectName,
CONVERT(nvarchar(max),
STUFF((SELECT N',' + l.value('@Column', 'nvarchar(128)') + N'=' + l.value('@ParameterCompiledValue', 'nvarchar(4000)')
FROM qp.query_plan.nodes('//ParameterList/ColumnReference') AS prm(l)
FOR XML PATH('')),1,1,N''))
as ParameterList,
(SELECT CONVERT(float,MAX(s.value('@StatementEstRows', 'float')))
FROM qp.query_plan.nodes('//StmtSimple') stmt(s))
as Cardinality,
(SELECT CONVERT(float,AVG(i.value('@Impact', 'float')))
FROM qp.query_plan.nodes('.//MissingIndexGroup') midx(i))
as [AvgMissingIndex%],
(SELECT CONVERT(float,SUM(op.value('@EstimateRows', 'float')))
FROM qp.query_plan.nodes('//RelOp') rel(op)
WHERE N'Sort' = op.value('@PhysicalOp','nvarchar(60)'))
as SortRows,
(SELECT CONVERT(float,SUM(op.value('@EstimateRows', 'float')))
FROM qp.query_plan.nodes('//RelOp') rel(op)
WHERE N'Table Scan' = op.value('@PhysicalOp','nvarchar(60)'))
as TableScanRows,
(SELECT COUNT(1)
FROM qp.query_plan.nodes('//Warnings[(@NoJoinPredicate[.="1"])]') nojoin(p))
as MissingJoin
FROM (SELECT plan_handle FROM cteQRequests WHERE plan_handle IS NOT NULL GROUP BY plan_handle) qr
CROSS APPLY sys.dm_exec_query_plan(qr.plan_handle) qp
),
cteQStats (sql_handle,plan_handle,RunCount,MinTimeSec,MaxTimeSec,MinRows,MaxRows,AvgCpuLowms,CpuHighms,AvgLogicalReadsMB,[PhyReads%])
AS (SELECT qr.sql_handle,
qr.plan_handle,
MAX(qs.execution_count) as RunCount,
CONVERT(bigint,(MIN(qs.min_elapsed_time) / 1000) / 1000)
as MinTimeSec,
CONVERT(bigint,(MAX(qs.max_elapsed_time) / 1000) / 1000)
as MaxTimeSec,
MIN(qs.min_rows) as MinRows,
MAX(qs.max_rows) as MaxRows,
CONVERT(bigint,AVG(qs.min_worker_time) / 1000)
as AvgCpuLowms,
CONVERT(bigint,MAX(qs.max_worker_time) / 1000)
as CpuHighms,
CONVERT(float,(MAX(qs.total_logical_reads) / MAX(qs.execution_count)) / 128.0)
as AvgLogicalReadsMB,
(CASE WHEN MAX(qs.total_logical_reads) >= CONVERT(bigint,1)
THEN CONVERT(float,MAX(qs.total_physical_reads) * 100.0) / CONVERT(float,MAX(qs.total_logical_reads))
ELSE CONVERT(float,0.0)
END) as [PhyReads%]
FROM (SELECT sql_handle, plan_handle FROM cteQRequests GROUP BY sql_handle, plan_handle) qr
LEFT JOIN sys.dm_exec_query_stats qs WITH (NOLOCK)
ON qs.sql_handle = qr.sql_handle
AND qs.plan_handle = qr.plan_handle
GROUP BY qr.sql_handle,
qr.plan_handle
)
SELECT qr.SPID,
MAX(qr.DatabaseName) as DatabaseName,
(CASE MIN(qr.[Status])
WHEN 1 THEN CONVERT(nvarchar(10),N'Background')
WHEN 2 THEN CONVERT(nvarchar(10),N'Running')
WHEN 3 THEN CONVERT(nvarchar(10),N'Runnable')
WHEN 4 THEN CONVERT(nvarchar(10),N'Sleeping')
WHEN 5 THEN CONVERT(nvarchar(10),N'Suspended')
ELSE CONVERT(nvarchar(10),NULL)
END) as [Status],
(CASE WHEN UPPER(MAX(qp.PlanType)) = N'PROC'
THEN CONVERT(nvarchar(133),N'Proc' + MAX(qp.ObjectName))
ELSE CONVERT(nvarchar(133),MAX(qp.PlanType))
END) as PlanType,
(CASE WHEN MAX(qr.query_cost) < 10 THEN CONVERT(nvarchar(10),N'Low')
WHEN MAX(qr.query_cost) < 100 THEN CONVERT(nvarchar(10),N'Medium')
WHEN MAX(qr.query_cost) < 1000 THEN CONVERT(nvarchar(10),N'Med-High')
WHEN MAX(qr.query_cost) < 10000 THEN CONVERT(nvarchar(10),N'High')
WHEN MAX(qr.query_cost) >= 10000 THEN CONVERT(nvarchar(10),N'VHigh')
ELSE CONVERT(nvarchar(10),NULL)
END) as QueryCost,
CONVERT(nvarchar(200),REPLACE(REPLACE(RTRIM(
(CASE WHEN MIN(qr.[Status]) <> 2 AND MAX(qr.RunnableCount) > 2 AND @RunnableCountAvg > 1
THEN CONVERT(nvarchar(8),N'CPUWait ')
ELSE N'' END +
CASE WHEN MAX(t.CursorOpen) > 0 AND MAX(t.CursorDormantms) >= 1
THEN CONVERT(nvarchar(27),N'Cursor(' + CONVERT(nvarchar(16),MAX(t.CursorDormantms)) + N'ms) ')
ELSE N'' END +
CASE WHEN MAX(qr.EstFinishTime) >= 1
THEN CONVERT(nvarchar(41),REPLACE(MAX(qr.DatabaseMaint),N' ',N'~')) + N'('
+ (CASE WHEN (MAX(qr.EstFinishTime) / 60000) > 600
THEN N'>10hr) '
ELSE CONVERT(nvarchar(3),MAX(qr.EstFinishTime) / 60000) + N'min) '
END)
ELSE N'' END +
CASE WHEN MAX(qr.query_cost) >= 10 AND MAX(qp.[AvgMissingIndex%]) > 20
THEN CONVERT(nvarchar(7),N'IdxGap ')
ELSE N'' END +
CASE WHEN CHARINDEX(N'[',MAX(sl.SessionLocks)) > 0
THEN CONVERT(nvarchar(8),N'IdxIdle ')
ELSE N'' END +
CASE WHEN SUM(qr.MemGrantMB) > CONVERT(float,SUM(qr.MemRequestMB) + 0.00001)
THEN CONVERT(nvarchar(32),N'InitialMem(') + CONVERT(nvarchar(17),CONVERT(numeric(16,2),SUM(qr.MemRequestMB))) + N'MB) '
ELSE N'' END +
CASE WHEN MAX([PhyReads%]) > CONVERT(float,20.0)
OR (MAX(qr.query_cost) >= 10 AND @PendingIOCountAvg > 1 AND (MAX([PhyReads%]) > CONVERT(float,5.0) OR MAX(qr.PAGEIOLATCHms) > 50))
THEN (CASE WHEN (@ProcessMemLow + @SystemMemLow) > 0
THEN CONVERT(nvarchar(9),N'IO(MemP) ')
ELSE CONVERT(nvarchar(9),N'IO ')
END)
ELSE N'' END +
CASE WHEN 0 < CHARINDEX(N'(WAIT',MAX(sl.SessionLocks))
THEN CONVERT(nvarchar(9),N'LockWait ')
ELSE N'' END +
CASE WHEN MAX(qr.MemGrantWait) = 1
THEN CONVERT(nvarchar(8),N'MemWait ')
ELSE N'' END +
CASE WHEN MAX(qp.MissingJoin) > 0
THEN CONVERT(nvarchar(9),N'MissJoin ')
ELSE N'' END +
CASE WHEN MAX(qr.PAGELATCHms) >= 1
THEN CONVERT(nvarchar(23),N'PageWait(' + CONVERT(nvarchar(10),MAX(qr.PAGELATCHms)) + N'ms) ')
ELSE N'' END +
CASE WHEN MAX(qp.ParameterList) <> N'' AND UPPER(MAX(qp.PlanType)) IN (N'PROC',N'ADHOC') AND MAX(qs.RunCount) > 1
AND ( CONVERT(float,MAX(qs.MaxRows) / 10.0) > CONVERT(float,((MAX(qs.MinRows) / 10.0) * (4.0 * @ParamSniff)) + POWER(CONVERT(float,10.0),@ParamSniff))
OR (MAX([PhyReads%]) > CONVERT(float,20.0)
OR (MAX(qr.query_cost) >= 10 AND @PendingIOCountAvg > 1 AND (MAX([PhyReads%]) > CONVERT(float,5.0) OR MAX(qr.PAGEIOLATCHms) > 50)))
OR ((MAX(t.TempdbAllocMB) - MAX(t.TempdbDeallocMB))
> (CASE WHEN CONVERT(int,(SUM(qr.MemGrantMB) / 10) * ((100 - ISNULL(MAX(qp.[AvgMissingIndex%]),0)) / 100)) > 49
THEN CONVERT(int,50)
ELSE 1 + CONVERT(int,(SUM(qr.MemGrantMB) / 10) * ((100 - ISNULL(MAX(qp.[AvgMissingIndex%]),0)) / 100))
END)))
AND CONVERT(float,MAX(qs.CpuHighms) / 10.0) > CONVERT(float,((MAX(qs.AvgCpuLowms) / 10.0) * (4.0 * @ParamSniff)) + POWER(CONVERT(float,10.0),@ParamSniff))
AND ((CASE WHEN MAX(qr.RuntimeSec) > MAX(qs.MaxTimeSec) THEN MAX(qr.RuntimeSec) ELSE MAX(qs.MaxTimeSec) END) - MAX(qs.MinTimeSec))
> ((MAX(qs.MinTimeSec) / 10) + POWER(CONVERT(bigint,10),@ParamSniff))
THEN CONVERT(nvarchar(37),N'ParamSniff(') + CONVERT(nvarchar(10),MAX(qs.MinTimeSec)) + N'-'
+ CONVERT(nvarchar(10),(CASE WHEN MAX(qr.RuntimeSec) > MAX(qs.MaxTimeSec) THEN MAX(qr.RuntimeSec) ELSE MAX(qs.MaxTimeSec) END)) + N'Sec) '
ELSE N'' END +
CASE WHEN MAX(qr.SpinLoopFlag) = 1
THEN CONVERT(nvarchar(9),N'SpinLoop ')
ELSE N'' END +
CASE WHEN (MAX(t.TempdbAllocMB) - MAX(t.TempdbDeallocMB))
> (CASE WHEN CONVERT(int,(SUM(qr.MemGrantMB) / 10) * ((100 - ISNULL(MAX(qp.[AvgMissingIndex%]),0)) / 100)) > 49
THEN CONVERT(int,50)
ELSE 1 + CONVERT(int,(SUM(qr.MemGrantMB) / 10) * ((100 - ISNULL(MAX(qp.[AvgMissingIndex%]),0)) / 100))
END)
THEN CONVERT(nvarchar(27),N'Tempdb')
+ (CASE WHEN MAX(t.TempdbWaitms) >= 1 THEN N'(' + CONVERT(nvarchar(16),MAX(t.TempdbWaitms)) + N'ms) ' ELSE N' ' END)
ELSE N'' END +
CASE WHEN MAX(qr.ThreadShortageFlag) = 1 AND @ThreadShortageAvg > 0
THEN CONVERT(nvarchar(15),N'ThreadShortage ')
ELSE N'' END +
CASE WHEN @VerCleanupRatio < CONVERT(float,80.0) AND MAX(t.VerDuration) >= 1
THEN CONVERT(nvarchar(25),N'Ver(') + CONVERT(nvarchar(16),MAX(t.VerDuration)) + N'sec) '
ELSE N'' END
)),N' ',N','),N'~',N' ')) as ThrottlePotential,
MAX(qr.RuntimeSec) as RuntimeSec,
CONVERT(nvarchar(50),
STUFF((SELECT N',' + CONVERT(nvarchar(50),qr2.BlockedBy)
FROM cteQRequests qr2
WHERE qr2.SPID = qr.SPID
AND qr2.BlockedBy IS NOT NULL
GROUP BY CONVERT(nvarchar(50),qr2.BlockedBy)
FOR XML PATH('')),1,1,N''))
as BlockedBy,
(SELECT CONVERT(nvarchar(max),
SUBSTRING(qt.text+' ',(MAX(qr.statement_start_offset) / 2) + 1,
((CASE WHEN MAX(qr.statement_end_offset) = -1
THEN DATALENGTH(qt.text)
ELSE MAX(qr.statement_end_offset)
END - MAX(qr.statement_start_offset)) / 2) + 1))
FROM sys.dm_exec_sql_text(qr.sql_handle) qt)
as Query,
MAX(qr.MemGrantMB) as MemGrantMB,
MAX(qs.RunCount) as RunCount,
MAX(qs.MinRows) as MinRows,
MAX(qs.MaxRows) as MaxRows,
MAX(qs.AvgCpuLowms) as AvgCpuLowms,
MAX(qs.CpuHighms) as CpuHighms,
MAX(qr.DOP) as DOP,
MAX(qs.AvgLogicalReadsMB) as AvgLogicalReadsMB,
(CASE WHEN MAX(qs.RunCount) IS NOT NULL THEN MAX(qs.[PhyReads%]) ELSE CONVERT(float,NULL) END)
as [PhyReads%],
MAX(qr.PAGEIOLATCHms) as PAGEIOLATCHms,
MAX(sl.SessionLocks) as SessionLocks,
MAX(t.VerActive) as VerActive,
MAX(t.TempdbAllocMB) as TempdbAllocMB,
MAX(t.TempdbDeallocMB) as TempdbDeallocMB,
MAX(qp.Cardinality) as Cardinality,
MAX(qp.[AvgMissingIndex%]) as [AvgMissingIndex%],
MAX(qp.SortRows) as SortRows,
MAX(qp.TableScanRows) as TableScanRows,
MAX(qp.ParameterList) as CachedParam,
(SELECT top 1 query_plan FROM sys.dm_exec_query_plan(qr.plan_handle))
as CachedPlan,
MAX(qr.ProgramName) as ProgramName,
MAX(qr.OriginalLogin) as OriginalLogin,
@Runtime as LogDateTime
FROM cteQRequests qr
LEFT JOIN cteQPlan qp
ON qp.plan_handle = qr.plan_handle
LEFT JOIN cteQStats qs
ON qs.sql_handle = qr.sql_handle
AND qs.plan_handle = qr.plan_handle
LEFT JOIN cteSLocks sl
ON sl.SPID = qr.SPID
LEFT JOIN cteTempdb t
ON t.SPID = qr.SPID
GROUP BY qr.SPID,
qr.sql_handle,
qr.plan_handle
HAVING (SELECT CONVERT(nvarchar(max),
SUBSTRING(qt.text+' ',(MAX(qr.statement_start_offset) / 2) + 1,
((CASE WHEN MAX(qr.statement_end_offset) = -1
THEN DATALENGTH(qt.text)
ELSE MAX(qr.statement_end_offset)
END - MAX(qr.statement_start_offset)) / 2) + 1))
FROM sys.dm_exec_sql_text(qr.sql_handle) qt) IS NOT NULL
ORDER BY qr.SPID
END;
GO