[英]SQL Server: getting deadlock victim error on a stored procedure without transaction
我有一个名为Storage
的表,具有以下设计:
CREATE TABLE [dbo].[Storage]
(
[Id] [INT] IDENTITY(1,1) NOT NULL,
[GameId] [INT] NOT NULL,
[UserId] [INT] NOT NULL,
[Status] [TINYINT] NOT NULL,
[CreatedAt] [DATETIME] NOT NULL,
[UpdatedAt] [DATETIME] NULL,
[Data] [NVARCHAR](MAX) NOT NULL,
CONSTRAINT [PK_Storage]
PRIMARY KEY CLUSTERED ([Id] ASC)
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
并且在存储过程MMO_Storage_Set
收到“死锁受害者错误”:
CREATE PROCEDURE [dbo].[MMO_Storage_Set]
@Data NVARCHAR(MAX),
@GameKey INT,
@UserId INT,
@ErrorCode INT OUT
AS
BEGIN
SET NOCOUNT ON;
-- user must have 1 active session at minimum
IF NOT EXISTS(SELECT Id FROM dbo.[Session] WITH(NOLOCK)
WHERE UserId = @UserId AND ([Status] = 1))
BEGIN
SET @ErrorCode = -3
RETURN
END
DECLARE @GameId INT = NULL
DECLARE @GameStatus TINYINT = NULL
SELECT @GameStatus = [Status], @GameId = Id
FROM dbo.[Game] WITH(NOLOCK)
WHERE ([Key] = @GameKey)
-- Game not found
IF @GameStatus IS NULL
BEGIN
SET @ErrorCode = -5
RETURN
END
-- Game is not valid
IF @GameStatus != 1
BEGIN
SET @ErrorCode = -6
RETURN
END
SET @ErrorCode = 0
IF (NOT EXISTS (SELECT ID FROM [Storage] WITH (NOLOCK)
WHERE [UserID] = @UserId AND [GameId] = @GameId))
BEGIN
INSERT INTO dbo.Storage (GameId, UserId,[Status], CreatedAt, UpdatedAt, Data)
VALUES (@GameId, @UserId, 1, GETDATE(), NULL, @Data)
END
ELSE
BEGIN
UPDATE dbo.Storage
SET Data = @Data, UpdatedAt = GETDATE()
WHERE (GameID = @GameId) AND (UserId = @UserId) AND ([Status] = 1)
END
SET @ErrorCode = 1
END
我的错误是:
事务(进程ID 55)被锁定死锁 与另一个进程通信缓冲资源,并已被选为死锁受害者。 重新运行事务。
我使用SQL Server Profiler来跟踪死锁,如您在SQL Server Profiler生成的死锁报告中所看到的:
<deadlock>
<victim-list>
<victimProcess id="process10754aca8" />
</victim-list>
<process-list>
<process id="process10754aca8" taskpriority="0" logused="0" waitresource="PAGE: 9:1:1167 " waittime="1302" ownerId="501754107" transactionname="UPDATE" lasttranstarted="2018-02-18T02:21:16.990" XDES="0x270741590" lockMode="U" schedulerid="3" kpid="6700" status="suspended" spid="63" sbid="0" ecid="1" priority="0" trancount="0" lastbatchstarted="2018-02-18T02:21:16.810" lastbatchcompleted="2018-02-18T02:21:16.817" lastattention="1900-01-01T00:00:00.817" clientapp=".Net SqlClient Data Provider" hostname="APP-SOCCER-VAS" hostpid="11332" isolationlevel="read committed (2)" xactid="501754107" currentdb="9" lockTimeout="4294967295" clientoption1="673185824" clientoption2="128056">
<executionStack>
<frame procname="SoccerChampion.dbo.MMO_Storage_Set" line="60" stmtstart="2870" stmtend="3132" sqlhandle="0x030009008b0bd114d1f2a4004da8000001000000000000000000000000000000000000000000000000000000">
Update dbo.Storage
Set Data = @Data, UpdatedAt = GETDATE()
WHERE (GameID = @GameId) AND (UserId = @UserId) AND ([Status] = 1 </frame>
</executionStack>
<inputbuf>
Proc [Database Id = 9 Object Id = 349244299] </inputbuf>
</process>
<process id="process136d8d088" taskpriority="0" logused="5384" waitresource="PAGE: 9:1:1167 " waittime="1056" ownerId="501753989" transactionname="UPDATE" lasttranstarted="2018-02-18T02:21:16.773" XDES="0x1767f9ce0" lockMode="U" schedulerid="1" kpid="9920" status="suspended" spid="52" sbid="0" ecid="3" priority="0" trancount="0" lastbatchstarted="2018-02-18T02:21:16.590" lastbatchcompleted="2018-02-18T02:21:16.597" lastattention="1900-01-01T00:00:00.597" clientapp=".Net SqlClient Data Provider" hostname="APP-SOCCER-VAS" hostpid="11332" isolationlevel="read committed (2)" xactid="501753989" currentdb="9" lockTimeout="4294967295" clientoption1="673185824" clientoption2="128056">
<executionStack>
<frame procname="SoccerChampion.dbo.MMO_Storage_Set" line="60" stmtstart="2870" stmtend="3132" sqlhandle="0x030009008b0bd114d1f2a4004da8000001000000000000000000000000000000000000000000000000000000">
Update dbo.Storage
Set Data = @Data, UpdatedAt = GETDATE()
WHERE (GameID = @GameId) AND (UserId = @UserId) AND ([Status] = 1 </frame>
</executionStack>
<inputbuf>
Proc [Database Id = 9 Object Id = 349244299] </inputbuf>
</process>
<process id="process1001b7848" taskpriority="0" logused="10000" waittime="654" schedulerid="4" kpid="10028" status="suspended" spid="52" sbid="0" ecid="0" priority="0" trancount="2" lastbatchstarted="2018-02-18T02:21:16.590" lastbatchcompleted="2018-02-18T02:21:16.597" lastattention="1900-01-01T00:00:00.597" clientapp=".Net SqlClient Data Provider" hostname="APP-SOCCER-VAS" hostpid="11332" loginname="SC_Core" isolationlevel="read committed (2)" xactid="501753989" currentdb="9" lockTimeout="4294967295" clientoption1="673185824" clientoption2="128056">
<executionStack>
<frame procname="SoccerChampion.dbo.MMO_Storage_Set" line="60" stmtstart="2870" stmtend="3132" sqlhandle="0x030009008b0bd114d1f2a4004da8000001000000000000000000000000000000000000000000000000000000">
Update dbo.Storage
Set Data = @Data, UpdatedAt = GETDATE()
WHERE (GameID = @GameId) AND (UserId = @UserId) AND ([Status] = 1 </frame>
</executionStack>
<inputbuf>
Proc [Database Id = 9 Object Id = 349244299] </inputbuf>
</process>
</process-list>
<resource-list>
<pagelock fileid="1" pageid="1167" dbid="9" subresource="FULL" objectname="SoccerChampion.dbo.Storage" id="lock205c8bb00" mode="U" associatedObjectId="72057594084524032">
<owner-list>
<owner id="process1001b7848" mode="U" />
</owner-list>
<waiter-list>
<waiter id="process10754aca8" mode="U" requestType="wait" />
</waiter-list>
</pagelock>
<pagelock fileid="1" pageid="1167" dbid="9" subresource="FULL" objectname="SoccerChampion.dbo.Storage" id="lock205c8bb00" mode="U" associatedObjectId="72057594084524032">
<owner-list>
<owner id="process10754aca8" mode="U" requestType="wait" />
</owner-list>
<waiter-list>
<waiter id="process136d8d088" mode="U" requestType="wait" />
</waiter-list>
</pagelock>
<exchangeEvent id="Pipeb1ff6380" WaitType="e_waitPipeGetRow" nodeId="2">
<owner-list>
<owner id="process136d8d088" />
</owner-list>
<waiter-list>
<waiter id="process1001b7848" />
</waiter-list>
</exchangeEvent>
</resource-list>
</deadlock>
我想知道为什么我在没有事务的update
查询中和在没有锁的读取查询中陷入僵局!
有人可以告诉我为什么我会收到此错误,如何解决它?
不是锁的答案,但我在这里看到问题
IF (NOT EXISTS (SELECT ID FROM [Storage] WITH (NOLOCK)
WHERE [UserID] = @UserId AND [GameId] = @GameId))
但是,如果确实存在,请更新
AND ([Status] = 1)
您尚未检查状态= 1,因此记录可能不存在
搜索使用merge的 upsert。 您可以消除该IF (NOT EXISTS
。这不是清除代码类型的建议。它可能会解决您的锁定问题。请确保它不会受到伤害。
也许对更新进行了明确的行锁,但是表提示应该是最后的努力。
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