我有一个总结日历特定数据的视图，它不断显示性能问题并创建客户的服务台通知单。
我们为员工配备了DBA的时间很短，但他从未参加过工作，所以被放开了。这很大程度上是开发人员管理的数据库。我已经运行了Brent Ozar的Sps（sp_BlitzFirst），并且对该视图的查询一直是成本最高的。
查询计划：https://www.brentozar.com/pastetheplan/?id=ry8Lo6T74
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SELECT
rae.ResourceAvailabilityExceptEventId AS MasterEventEntityId,
me.MasterEventId AS MasterEventId,
null AS ParentEventId,
me.MasterEventBillingInfoId AS MasterEventBillingInfoId,
0 AS HasScheduledParentEvent,
me.Subject AS EventSubject,
me.Description AS EventDescription,
me.EventStartDate AS EventStartDate,
me.EventEndDate AS EventEndDate,
me.TimeZone AS TimeZone,
mebi.TotalBillAmount AS BillAmount,
null AS CancelledReason,
null AS HasDiagnosis,
null AS ParticipantAuthorizationId,
null AS AuthorizationNumber,
null AS AuthorizationDescription,
null AS BillingSourceName,
null AS BillingSourceTypeId,
me.EventTypeId AS EventTypeId,
cet.Description AS EventType,
me.EventSubTypeId AS EventSubTypeId,
cest.Description AS EventSubType,
1 AS IsTimeOff,
0 AS IsInsurance,
CASE WHEN me.MasterEventBillingInfoId is null THEN 0 ELSE 1 END AS IsBillable,
0 AS IsScheduled,
0 AS IsCompleted,
0 AS IsRecurring,
0 AS IsLinkedEvent,
null AS ChildEventTypeId,
null AS ChildEventType,
'timeoff' AS EventStatus,
null AS EventStatusId,
null AS WorkflowStatusId,
null AS WorkflowStatusDescription,
ra.LinkId AS LinkId,
ra.EntityId AS EntityId,
IIF(ra.EntityId = 'E32955F7-1CE8-46A1-98D3-06A69FA4B29E',1,0) AS IsAssignedParticipant,
IIF(ra.EntityId = '173F0473-747A-48F6-B7E8-06948370AAF8',1,0) AS IsAssignedEmployee,
par.PersonId AS ParticipantId,
emp.PersonId AS AssignedEmployeeId,
null AS BillUnderEmployeeId,
null AS SupervisorEmployeeId,
par.FirstName AS ParticipantFirstName,
par.LastName AS ParticipantLastName,
emp.FirstName AS AssignedEmployeeFirstName,
emp.LastName AS AssignedEmployeeLastName,
null AS BillUnderEmployeeFirstName,
null AS BillUnderEmployeeLastName,
null AS SupervisorEmployeeFirstName,
null AS SupervisorEmployeeLastName,
null AS CredentialId,
null AS CredentialName,
me.LocationId AS LocationId,
o.Name AS Location,
0 AS PublishedScoreSheetCount,
0 AS SessionCount,
0 AS AuthItemCount,
null AS BillCodes,
pstat.Description AS PayrollStatus,
me.PayrollStatusId AS PayrollStatusId,
me.PayrollLastExportDate AS PayrollLastExportDate,
me.PayCodeId AS PayCodeId,
pc.Name AS PayCodeName
FROM Data.MasterEvent me
JOIN Data.ResourceAvailabilityExceptEvent rae WITH ( NOLOCK ) ON me.MasterEventId = rae.ResourceAvailabilityExceptEventId
JOIN Data.ResourceAvailability ra WITH ( NOLOCK ) ON rae.ResourceAvailabilityId = ra.ResourceAvailabilityId AND ra.IsSoftDeleted = 0
JOIN Mgr.Code cet WITH ( NOLOCK ) on cet.CodeId = me.EventTypeId
LEFT JOIN Mgr.Code cest WITH ( NOLOCK ) on cest.CodeId = me.EventSubTypeId
LEFT JOIN Data.MasterEventBillingInfo mebi WITH ( NOLOCK ) on me.MasterEventBillingInfoId = mebi.MasterEventBillingInfoId
LEFT JOIN Data.Person emp WITH ( NOLOCK ) on ra.LinkId = emp.PersonId AND ra.EntityId = '173F0473-747A-48F6-B7E8-06948370AAF8'
LEFT JOIN Data.Person par WITH ( NOLOCK ) on ra.LinkId = par.PersonId AND ra.EntityId = 'E32955F7-1CE8-46A1-98D3-06A69FA4B29E'
LEFT JOIN Data.Organization o WITH ( NOLOCK ) ON o.OrganizationId = me.LocationId AND o.IsSoftDeleted = 0
LEFT JOIN Mgr.Code pstat WITH ( NOLOCK ) on pstat.CodeId = me.PayrollStatusId
LEFT JOIN Data.PayCode pc WITH(NOLOCK) on pc.PayCodeId = me.PayCodeId
WHERE me.IsSoftDeleted = 0
UNION
SELECT
mee.MasterEventEntityId,
mee.MasterEventId,
me.ParentEventId,
me.MasterEventBillingInfoId,
CASE WHEN separent.ScheduledEventId is null THEN 0 ELSE 1 END as HasScheduledParentEvent,
me.Subject as EventSubject,
me.Description as EventDescription,
me.EventStartDate,
me.EventEndDate,
me.TimeZone,
mebi.TotalBillAmount AS BillAmount,
COALESCE(se.CancelledReason,sece.CancelledReason,null) AS CancelledReason,
IIF(egb.DiagnosisCodes IS NOT NULL,1,0) AS HasDiagnosis,
mebi.ParticipantAuthorizationId,
auth.AuthorizationNumber,
auth.Description as AuthorizationDescription,
billsrccmp.Name as BillingSourceName,
billsrc.BillingSourceTypeId,
me.EventTypeId,
cet.Description as EventType,
me.EventSubTypeId,
cest.Description as EventSubType,
0 AS IsTimeOff,
CASE
WHEN billsrc.BillingSourceTypeId = 'CCBDBCFC-2225-4511-B617-190430D1897C' THEN 1
else 0 END as IsInsurance,
CASE WHEN me.MasterEventBillingInfoId is null THEN 0 ELSE 1 END as IsBillable,
CASE WHEN se.ScheduledEventId is null THEN 0 ELSE 1 END as IsScheduled,
CASE WHEN ce.CompletedEventId is null THEN 0 ELSE 1 END as IsCompleted,
CASE WHEN se.ScheduleRecurrenceId is null THEN 0 ELSE 1 END as IsRecurring,
IIF(meparent.EventTypeId = '7d881908-d373-43eb-a550-ca5e6b55137c', 0, 1) IsLinkedEvent,
pevstat.EventTypeId as ChildEventTypeId,
pevstat.EventType as ChildEventType,
COALESCE(pevstat.EventStatus, evstat.EventStatus) as EventStatus,
ce.EventStatusId,
ce.WorkflowStatusId,
ceC.Description,
mee.LinkId,
mee.EntityId,
IIF(mee.LinkId = par.ParticipantId, 1, 0) as IsAssignedParticipant,
IIF(mee.LinkId = me.AssignedEmployeeId, 1, 0) as IsAssignedEmployee,
par.ParticipantId,
aemp.EmployeeId as AssignedEmployeeId,
buemp.EmployeeId as BillUnderEmployeeId,
semp.EmployeeId as SupervisorEmployeeId,
pperson.FirstName as ParticipantFirstName,
pperson.LastName as ParticipantLastName,
aeperson.FirstName as AssignedEmployeeFirstName,
aeperson.LastName as AssignedEmployeeLastName,
bueperson.FirstName as BillUnderEmployeeFirstName,
bueperson.LastName as BillUnderEmployeeLastName,
seperson.FirstName as SupervisorEmployeeFirstName,
seperson.LastName as SupervisorEmployeeLastName,
c.CredentialId,
c.Name as CredentialName,
me.LocationId,
o.Name AS Location,
COALESCE(sss.ScheduledScoreSheetCount, css.CompletedScoreSheetCount, 0) as PublishedScoreSheetCount,
COALESCE(sss.ScheduledSessionCount, css.CompletedSessionCount, 0) as SessionCount,
aai.ApptAuthItemCount as AuthItemCount,
bc.BillCodes,
pstat.Description as PayrollStatus,
me.PayrollStatusId,
me.PayrollLastExportDate,
pc.PayCodeId,
pc.Name AS PayCodeName
FROM Data.MasterEventEntity mee WITH ( NOLOCK )
JOIN Data.MasterEvent me WITH ( NOLOCK ) on mee.MasterEventId = me.MasterEventId AND me.IsSoftDeleted = 0
JOIN Views.EventStatus evstat on evstat.MasterEventId = me.MasterEventId
LEFT JOIN Data.Organization o WITH ( NOLOCK ) ON o.OrganizationId = me.LocationId AND o.IsSoftDeleted = 0
LEFT JOIN Views.EventGroupingBase egb on egb.MasterEventId = mee.MasterEventId
LEFT JOIN Data.ScheduledEvent se WITH ( NOLOCK ) on se.ScheduledEventId = me.MasterEventId
LEFT JOIN Data.CompletedEvent ce WITH ( NOLOCK ) on ce.CompletedEventId = me.MasterEventId
LEFT JOIN Mgr.Code ceC WITH ( NOLOCK ) on ce.WorkflowStatusId = ceC.CodeId
LEFT JOIN Data.ScheduledEvent sece WITH ( NOLOCK ) on sece.ScheduledEventId = ce.ScheduledEventId
JOIN Mgr.Code cet WITH ( NOLOCK ) on cet.CodeId = me.EventTypeId
LEFT JOIN Mgr.Code cest WITH ( NOLOCK ) on cest.CodeId = me.EventSubTypeId
LEFT JOIN Data.MasterEvent meparent WITH ( NOLOCK ) on meparent.MasterEventId = me.ParentEventId
LEFT JOIN Data.ScheduledEvent separent WITH ( NOLOCK ) on separent.ScheduledEventId = me.ParentEventId
LEFT JOIN Views.ParentEventStatus pevstat on me.EventTypeId = '7d881908-d373-43eb-a550-ca5e6b55137c' AND pevstat.MasterEventId = me.MasterEventId
LEFT JOIN Data.MasterEventBillingInfo mebi WITH ( NOLOCK ) on mebi.MasterEventBillingInfoId = me.MasterEventBillingInfoId and mebi.IsSoftDeleted = 0
LEFT JOIN Mgr.Code pstat WITH ( NOLOCK ) on pstat.CodeId = me.PayrollStatusId
LEFT JOIN Data.PayCode pc WITH(NOLOCK) on pc.PayCodeId=me.PayCodeId
LEFT JOIN Data.Participant par WITH ( NOLOCK ) on par.ParticipantId = COALESCE(mebi.ParticipantId, mee.LinkId)
LEFT JOIN Data.Person pperson WITH ( NOLOCK ) on pperson.PersonId = par.ParticipantId and pperson.IsSoftDeleted = 0
LEFT JOIN Data.Employee buemp WITH ( NOLOCK ) on buemp.EmployeeId = mebi.BillUnderEmployeeId
LEFT JOIN Data.Person bueperson WITH ( NOLOCK ) on bueperson.PersonId = buemp.EmployeeId and bueperson.IsSoftDeleted = 0
LEFT JOIN Data.Employee aemp WITH ( NOLOCK ) on aemp.EmployeeId = me.AssignedEmployeeId
LEFT JOIN Data.Person aeperson WITH ( NOLOCK ) on aeperson.PersonId = aemp.EmployeeId and aeperson.IsSoftDeleted = 0
LEFT JOIN Data.Credential c WITH ( NOLOCK ) on c.CredentialId = mebi.CredentialId and c.IsSoftDeleted = 0
LEFT JOIN Data.Employee semp WITH ( NOLOCK ) on semp.EmployeeId = mebi.SupervisorEmployeeId
LEFT JOIN Data.Person seperson WITH ( NOLOCK ) on seperson.PersonId = semp.EmployeeId and seperson.IsSoftDeleted = 0
LEFT JOIN Data.ParticipantAuthorization auth WITH ( NOLOCK ) on auth.ParticipantAuthorizationId = mebi.ParticipantAuthorizationId and auth.IsSoftDeleted = 0
LEFT JOIN Data.Contract authContract WITH ( NOLOCK ) on authContract.ContractId = auth.ContractId and authContract.IsSoftDeleted = 0
LEFT JOIN Data.BillingSource billsrc WITH ( NOLOCK ) on billsrc.BillingSourceId = authContract.BillingSourceId
LEFT JOIN Data.Company billsrccmp WITH ( NOLOCK ) on billsrccmp.CompanyId = billsrc.BillingSourceId and billsrccmp.IsSoftDeleted = 0
LEFT JOIN Data.InvoiceCharge ic WITH ( NOLOCK ) on ic.CompletedEventId = me.MasterEventId and ic.InvoiceChargeStatusId != 'A2D34290-8630-4735-ACCF-E08D3D1A9480' and ic.IsSoftDeleted = 0
LEFT JOIN Data.Invoice inv WITH ( NOLOCK ) on ic.InvoiceId = inv.InvoiceId and inv.IsSoftDeleted = 0
LEFT JOIN (SELECT
MasterEventBillingInfoId,
count(AuthorizationItemId) ApptAuthItemCount
FROM Data.MasterEventBillingInfoAuthItem mebiai WITH ( NOLOCK )
WHERE mebiai.IsSoftDeleted = 0
GROUP BY mebiai.MasterEventBillingInfoId) aai ON aai.MasterEventBillingInfoId = mebi.MasterEventBillingInfoId
LEFT JOIN (
SELECT
mbi2.MasterEventBillingInfoId,
STUFF((
SELECT ',' + CONCAT(bc.Name,
IIF(caeai.Modifier1 != '', CONCAT('-', caeai.Modifier1), ''),
IIF(caeai.Modifier2 != '', CONCAT(' ', caeai.Modifier2), ''),
IIF(caeai.Modifier3 != '', CONCAT(' ', caeai.Modifier3), ''),
IIF(caeai.Modifier4 != '', CONCAT(' ', caeai.Modifier4), ''))
FROM Data.MasterEventBillingInfoAuthItem caeai WITH ( NOLOCK )
JOIN Data.AuthorizationItem ai WITH ( NOLOCK ) ON caeai.AuthorizationItemId = ai.AuthorizationItemId AND ai.IsSoftDeleted = 0
JOIN Data.FeeScheduleItem fsi WITH ( NOLOCK ) ON ai.FeeScheduleItemId = fsi.FeeScheduleItemId AND fsi.IsSoftDeleted = 0
JOIN Data.BillCode bc WITH ( NOLOCK ) ON bc.BillCodeId = fsi.BillCodeId AND bc.IsSoftDeleted = 0
WHERE mbi2.MasterEventBillingInfoId = caeai.MasterEventBillingInfoId AND caeai.IsSoftDeleted = 0
ORDER BY bc.Name
FOR XML PATH ('')), 1, 1, '') AS BillCodes
FROM Data.MasterEventBillingInfo mbi2 WITH ( NOLOCK )
) bc ON bc.MasterEventBillingInfoId = mebi.MasterEventBillingInfoId
LEFT JOIN (SELECT
s.ScheduledEventId,
count(s.ScoreSheetId) ScheduledScoreSheetCount,
count(SessionId) ScheduledSessionCount
FROM Data.ScheduledEventScoreSheet s WITH ( NOLOCK )
left join Data.DataSheet ds on s.ScoreSheetId = ds.DataSheetId
WHERE s.IsSoftDeleted = 0 AND ds.DefinitionFinishedDate IS NOT NULL AND ds.CompletionDate IS NULL
GROUP BY s.ScheduledEventId) sss ON sss.ScheduledEventId = me.MasterEventId
LEFT JOIN (SELECT
s.CompletedEventId,
count(ScoreSheetId) CompletedScoreSheetCount,
count(SessionId) CompletedSessionCount
FROM Data.CompletedEventScoreSheet s WITH ( NOLOCK )
WHERE s.IsSoftDeleted = 0
GROUP BY s.CompletedEventId) css ON css.CompletedEventId = me.MasterEventId
WHERE mee.ShowOnCalendar = 1 AND mee.IsSoftDeleted = 0
即使我只是推荐一些可以信赖的优秀DBA顾问，我也需要我做些什么。
答案 0 :(得分：0)
这可能是不是唯一的一个大问题，但它看起来像你有重点查找在MasterEventBillingInfoAuthItem表7K值和300个中的查找表MasterEvent。查看这些表的索引。