我刚刚在我们的实时环境中实现了一个新数据库，该数据库由我们的两个事务数据库中的服务代理提供信息。当消息进入新数据库时，我们有一系列存储过程来操作每个特定用户的提要。
我还有另一组存储过程，用户而不是车辆重新操作数据，我们的维护屏幕使用这些存储过程来确保我们可以更改用户对数据的可见性。
下面的存储过程一直保持锁定我现在已经修改了这个sp来首先更新一个临时表然后只对主数据库进行一次更新，但这没有帮助的情况，我也修改了所以我可以更新较小的批次，如果失败，请继续重试，直到成功为止。这在我们的开发环境中100％工作，但在实时它保持锁定。服务经纪人的吞吐量不足以记录失败次数，因此我认为我将自己锁定在这个sp中？
我已经包含了---＆＃39;此更新KEEPS LOCKING＆＃39;在失败的时候。
可能导致此锁定行为的原因是什么？
USE [Isight]
GO / ** 对象：StoredProcedure [dbo]。[UserVisibilityForVehicles]脚本日期：07/18/2014 14:43:04 ** / SET ANSI_NULLS ON 走 SET QUOTED_IDENTIFIER ON GO
ALTER PROCEDURE [dbo]。[UserVisibilityForVehicles] - 在此处添加存储过程的参数 @Username VARCHAR（50） 随着重建 如 开始 - 添加SET NOCOUNT ON以防止出现额外的结果集 - 干扰SELECT语句。 SET NOCOUNT ON;
PRINT 'UserVisibilityForVehicles Started'
-- Now Start to check security for user.
IF EXISTS ( SELECT ID FROM dbo.SecurityTable WHERE userid = @Username AND Deleted = 0)
BEGIN
CREATE TABLE #VehicleToUsers(ID BIGINT, NewRecord BIT DEFAULT(0))
CREATE CLUSTERED INDEX IDX_VehicleToUsers ON #VehicleToUsers(ID)
CREATE NonCLUSTERED INDEX IDX_NewRecord ON #VehicleToUsers(ID)
INSERT INTO #VehicleToUsers
( ID )
(
SELECT Distinct Veh.[ID]
FROM [iSight].[dbo].[Vehicle] Veh WITH (NOLOCK)
INNER JOIN SecurityTable WITH (NOLOCK) ON Veh.[System] = SecurityTable.[System]
WHERE SecurityType = 1 AND UserID = @Username AND SecurityTable.deleted = 0
)
INSERT INTO #VehicleToUsers
( ID )
(
SELECT DISTINCT Veh.[ID]
FROM [iSight].[dbo].[Vehicle] Veh WITH (NOLOCK)
INNER JOIN SecurityTable WITH (NOLOCK) ON Veh.[System] = SecurityTable.[System] AND Veh.CurrentSite = SecurityTable.[Site]
WHERE SecurityType = 2 AND UserID = @Username AND SecurityTable.deleted = 0
)
BEGIN
PRINT 'UserVisibilityForVehicles: ' + @Username
INSERT INTO #VehicleToUsers
( ID )
(
SELECT DISTINCT Vehicle.ID
FROM Manufacturer WITH (NOLOCK) INNER JOIN
ManufacturerAgreementSubcustomer WITH (NOLOCK) ON Manufacturer.ID = ManufacturerAgreementSubcustomer.ManufacturerID INNER JOIN
ManufacturerMake WITH (NOLOCK) ON Manufacturer.ID = ManufacturerMake.ManufacturerID INNER JOIN
Vehicle WITH (NOLOCK) ON ManufacturerMake.Make = Vehicle.Make AND ManufacturerAgreementSubcustomer.Agreement = Vehicle.CurrentAgreement INNER JOIN
SecurityTable WITH (NOLOCK) ON Manufacturer.ManufacturerGroupID = SecurityTable.ManufacturerGroupID AND Vehicle.System = SecurityTable.System
WHERE (SecurityTable.SecurityType = 3) AND (SecurityTable.UserID = @Username) AND ManufacturerMake.Deleted = 0 AND ManufacturerAgreementSubcustomer.Deleted = 0 AND SecurityTable.deleted = 0
)
INSERT INTO #VehicleToUsers
( ID )
(
SELECT DISTINCT Vehicle.ID
FROM Manufacturer WITH (NOLOCK) INNER JOIN
ManufacturerAgreementSubcustomer WITH (NOLOCK) ON Manufacturer.ID = ManufacturerAgreementSubcustomer.ManufacturerID INNER JOIN
ManufacturerMake WITH (NOLOCK) ON Manufacturer.ID = ManufacturerMake.ManufacturerID INNER JOIN
Vehicle WITH (NOLOCK) ON ManufacturerMake.Make = Vehicle.Make AND ManufacturerAgreementSubcustomer.Agreement = Vehicle.CurrentAgreement INNER JOIN
SecurityTable WITH (NOLOCK) ON Vehicle.System = SecurityTable.System AND Manufacturer.ID = SecurityTable.ManufacturerID
WHERE (SecurityTable.SecurityType = 4) AND (SecurityTable.UserID = @Username) AND ManufacturerMake.Deleted = 0 AND ManufacturerAgreementSubcustomer.Deleted = 0 AND SecurityTable.deleted = 0
)
INSERT INTO #VehicleToUsers
( ID )
(
SELECT DISTINCT Vehicle.ID
FROM Manufacturer WITH (NOLOCK) INNER JOIN
ManufacturerAgreementSubcustomer WITH (NOLOCK) ON Manufacturer.ID = ManufacturerAgreementSubcustomer.ManufacturerID INNER JOIN
ManufacturerMake WITH (NOLOCK) ON Manufacturer.ID = ManufacturerMake.ManufacturerID INNER JOIN
Vehicle WITH (NOLOCK) ON ManufacturerMake.Make = Vehicle.Make AND ManufacturerAgreementSubcustomer.Agreement = Vehicle.CurrentAgreement INNER JOIN
SecurityTable WITH (NOLOCK) ON Vehicle.System = SecurityTable.System AND Manufacturer.ID = SecurityTable.ManufacturerID AND
ManufacturerAgreementSubcustomer.ID = SecurityTable.ManufacturerAgreementSub INNER JOIN
ManufacturerUserAgreementSubcustomer WITH (NOLOCK) ON
ManufacturerAgreementSubcustomer.ID = ManufacturerUserAgreementSubcustomer.ManufacturerAgreementSubcustomerID AND
SecurityTable.ManufacturerID = ManufacturerUserAgreementSubcustomer.ManufacturerID AND
SecurityTable.UserID = ManufacturerUserAgreementSubcustomer.UserName
WHERE (SecurityTable.SecurityType = 5) AND (SecurityTable.UserID = @Username) AND (ManufacturerMake.Deleted = 0) AND
(ManufacturerAgreementSubcustomer.Deleted = 0) AND (ManufacturerUserAgreementSubcustomer.Deleted = 0) AND SecurityTable.deleted = 0
)
INSERT INTO #VehicleToUsers
( ID )
(
SELECT DISTINCT Vehicle.ID
FROM Manufacturer WITH (NOLOCK) INNER JOIN
ManufacturerAgreementSubcustomer WITH (NOLOCK) ON Manufacturer.ID = ManufacturerAgreementSubcustomer.ManufacturerID INNER JOIN
ManufacturerMake WITH (NOLOCK) ON Manufacturer.ID = ManufacturerMake.ManufacturerID INNER JOIN
Vehicle WITH (NOLOCK) ON ManufacturerMake.Make = Vehicle.Make AND ManufacturerAgreementSubcustomer.Agreement = Vehicle.CurrentAgreement AND
ManufacturerAgreementSubcustomer.Subcustomer = Vehicle.CurrentSubCustomer INNER JOIN
SecurityTable WITH (NOLOCK) ON Vehicle.System = SecurityTable.System AND Manufacturer.ID = SecurityTable.ManufacturerID AND
ManufacturerAgreementSubcustomer.ID = SecurityTable.ManufacturerAgreementSub INNER JOIN
ManufacturerUserAgreementSubcustomer WITH (NOLOCK) ON
ManufacturerAgreementSubcustomer.ID = ManufacturerUserAgreementSubcustomer.ManufacturerAgreementSubcustomerID AND
SecurityTable.UserID = ManufacturerUserAgreementSubcustomer.UserName AND
SecurityTable.ManufacturerID = ManufacturerUserAgreementSubcustomer.ManufacturerID
WHERE (SecurityTable.SecurityType = 6) AND (SecurityTable.UserID = @Username) AND (ManufacturerMake.Deleted = 0) AND
(ManufacturerAgreementSubcustomer.Deleted = 0) AND (ManufacturerUserAgreementSubcustomer.Deleted = 0) AND SecurityTable.deleted = 0
)
END
CREATE TABLE #VehicleToUserCopy(ID BIGINT, vehicleTableID BIGINT, Deleted BIT DEFAULT(1), UpdatedAt DATETIME DEFAULT (GETDATE()), UpdatedBy VARCHAR(50) DEFAULT('UserVisibilityForVehicles-Update'), NextToUpdate BIT DEFAULT(0))
CREATE CLUSTERED INDEX idx_ID ON #VehicleToUserCopy(ID)
CREATE NONCLUSTERED INDEX idx_VehicleTableID ON #VehicleToUserCopy(vehicleTableID)
CREATE NONCLUSTERED INDEX idx_NextToUpdate ON #VehicleToUserCopy(NextToUpdate)
INSERT INTO #VehicleToUserCopy
( ID ,
vehicleTableID ,
Deleted
)
(
SELECT ID, vehicleTableID, Deleted
FROM dbo.VehicleToUser WITH (nolock)
WHERE Username = @Username
)
PRINT 'Starting to do updates'
--Not required as default set to 1
----UPDATE VehicleToUser
----SET DELETED = 1
----,UpdatedAt = GETDATE()
----,UpdatedBy = 'UserVisibilityForVehicles'
----FROM dbo.VehicleToUser WITH (NOLOCK)
----LEFT JOIN #VehicleToUsers AS UsersVehicles ON VehicleToUser.VehicleTableID = UsersVehicles.ID
----WHERE UserName = @Username AND UsersVehicles.ID IS null
PRINT 'Starting to do updates - Set Deleted = 0'
SET LOCK_TIMEOUT 1000 -- set to second
DECLARE @Tries tinyint
UPDATE #VehicleToUserCopy
SET Deleted = 0
FROM #VehicleToUserCopy AS VehicleToUserCopy
inner JOIN #VehicleToUsers AS UsersVehicles ON VehicleToUserCopy.VehicleTableID = UsersVehicles.ID
INSERT INTO VehicleToUser(UserName, VehicleTableID, DELETED, UpdatedAt, UpdatedBy)
(
SELECT DISTINCT @Username, TempVehicle.ID, 0 , GETDATE(), 'UserVisibilityForVehicles-Insert'
FROM #VehicleToUsers AS TempVehicle
LEFT JOIN (
SELECT VehicleTableID
FROM #VehicleToUserCopy WITH (NOLOCK)
) AS [VehicleToUser] ON TempVehicle.ID = [VehicleToUser].VehicleTableID
WHERE [VehicleToUser].VehicleTableID IS null
)
DECLARE @ID bigint
SELECT @ID = ID FROM #VehicleToUserCopy
WHILE @@rowcount > 0
BEGIN
SET ROWCOUNT 1000
SELECT @Tries = 1
WHILE @Tries <= 3
BEGIN
BEGIN TRANSACTION
BEGIN TRY
UPDATE #VehicleToUserCopy SET NextToUpdate = 1
---'THIS UPDATE KEEPS LOCKING'
UPDATE dbo.VehicleToUser
SET Deleted = VehicleToUserCopy.Deleted
, UpdatedAt = GETDATE()
, UpdatedBy = VehicleToUserCopy.UpdatedBy
FROM VehicleToUser
inner JOIN #VehicleToUserCopy AS VehicleToUserCopy ON VehicleToUser.ID = VehicleToUserCopy.ID
WHERE VehicleToUserCopy.NextToUpdate = 1
PRINT 'WORKED'
DELETE FROM #VehicleToUserCopy WHERE NextToUpdate = 1
COMMIT
-- therefore we can leave our loop
BREAK
END TRY
BEGIN CATCH
ROLLBACK --always rollback
PRINT 'Rolled Back '
-- Now check for Blocking errors 1222 or Deadlocks 1205 and if its a deadlock wait for a while to see if that helps
SELECT ERROR_MESSAGE()
IF ERROR_NUMBER() = 1205 OR ERROR_NUMBER() = 1222
BEGIN
-- if its a deadlock wait 2 seconds then try again
IF ERROR_NUMBER() = 1205
BEGIN -- wait 2 seconds to see if that helps the deadlock
WAITFOR DELAY '00:00:02'
END
-- no need to wait for anything for BLOCKING ERRORS as our LOCK_TIMEOUT is going to wait for half a second anyway
-- and if it hasn't finished by then (500ms x 3 attempts = 1.5 seconds) there is no point waiting any longer
END
SELECT @Tries = @Tries + 1 -- increment and try again for 3 goes
-- we carry on until we reach our limit i.e 3 attempts
CONTINUE
END CATCH
END
SELECT @ID = ID FROM #VehicleToUserCopy
End
SET ROWCOUNT 0
DROP TABLE #VehicleToUsers
END
ELSE
BEGIN
DELETE FROM dbo.VehicleToUser WHERE username = @Username
DELETE FROM dbo.VehicleToUser_UserCurrentImageCount WHERE username = @Username
DELETE FROM dbo.VehicleToUser_UsersCurrentVehicles WHERE username = @Username
End
答案 0 :(得分：0)
尝试稍微更改您的更新。在使用这样的更新并更新基表时，我看到了一些不一致的结果。您应该更新别名。
UPDATE v
SET Deleted = VCopy.Deleted
, UpdatedAt = GETDATE()
, UpdatedBy = VCopy.UpdatedBy
FROM VehicleToUser v
inner JOIN #VehicleToUserCopy AS VCopy ON v.ID = VCopy.ID
WHERE VCopy.NextToUpdate = 1