Question

我是sql server的新手。我在SQL Server中面临死锁问题。在死锁图中显示由于3个进程，发生了死锁。我无法通过3个进程来了解死锁图。下面是我的死锁图。

下面是xml死锁：

<deadlock>
    <victim-list>
        <victimProcess id="process2db5c28" />
    </victim-list>
    <process-list>
        <process id="process2db5c28" taskpriority="0" logused="0" waitresource="KEY: 10:72057597892755456 (63eb251d860a)" waittime="11658" ownerId="5805847" transactionname="user_transaction" lasttranstarted="2019-02-10T18:12:06.793" XDES="0x336846d90" lockMode="S" schedulerid="4" kpid="7860" status="suspended" spid="327" sbid="0" ecid="0" priority="0" trancount="1" lastbatchstarted="2019-02-10T18:12:07.080" lastbatchcompleted="2019-02-10T18:12:07.073" lastattention="1900-01-01T00:00:00.073" clientapp=".Net SqlClient Data Provider" hostname="Test" hostpid="7716" loginname="test" isolationlevel="read committed (2)" xactid="5805847" currentdb="10" currentdbname="test_Event_6701" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128056">
            <executionStack>
                <frame procname="adhoc" line="1" stmtstart="320" stmtend="2784" sqlhandle="0x02000000c6cb1d04abdbec564d5b74a8bedb0851eaa773280000000000000000000000000000000000000000">
unknown    </frame>
                <frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown    </frame>
            </executionStack>
            <inputbuf>
(@p0 bigint,@p1 datetime,@p2 datetime,@p3 bit,@p4 nvarchar(4000),@p5 nvarchar(4000),@p6 nvarchar(4000),@p7 nvarchar(4000),@p8 nvarchar(4000),@p9 nvarchar(4000))SELECT this_.Request_Id as Request1_190_0_, this_.Request_CreateDate as Request2_190_0_, this_.Request_IsSuccessful as Request3_190_0_, this_.Request_UpdateExistingPositionProduct as Request4_190_0_, this_.Request_UpdateCustomValidationCaching as Request5_190_0_, this_.Request_IsAnyHpcTaskInProgress as Request6_190_0_, this_.Request_ChangeTypes as Request7_190_0_, this_.IsSystemRequest as IsSystem8_190_0_, this_.SubmittedOn as Submitte9_190_0_, this_.EffectiveDate as Effecti10_190_0_, this_.ActionDate as ActionDate190_0_, this_.ActionType as ActionType190_0_, this_.RequestStatus as Request13_190_0_, this_.AuthorPositionId as AuthorP14_190_0_, this_.Title as Title190_0_, this_.LastComment as LastCom16_190_0_, this_.RequestCode as Request17_190_0_, this_.AuthorPersonnelId as AuthorP18_190_0_, this_.IsSyncedToReporting as IsSynce19_190_0_, this_.Personne   </inputbuf>
        </process>
        <process id="process2dceca8" taskpriority="0" logused="256" waitresource="KEY: 10:72057597892755456 (63eb251d860a)" waittime="10583" ownerId="5802704" transactionname="user_transaction" lasttranstarted="2019-02-10T18:12:06.277" XDES="0x378b2b770" lockMode="S" schedulerid="1" kpid="7732" status="suspended" spid="297" sbid="0" ecid="0" priority="0" trancount="1" lastbatchstarted="2019-02-10T18:12:08.147" lastbatchcompleted="2019-02-10T18:12:08.107" lastattention="1900-01-01T00:00:00.107" clientapp=".Net SqlClient Data Provider" hostname="Test" hostpid="7716" loginname="test" isolationlevel="read committed (2)" xactid="5802704" currentdb="10" currentdbname="test_Event_6701" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128056">
            <executionStack>
                <frame procname="adhoc" line="1" stmtend="826" sqlhandle="0x02000000c41a7b04756cb87d16131d008eb58c6f909659cd0000000000000000000000000000000000000000">
unknown    </frame>
                <frame procname="mssqlsystemresource.sys.sp_executesql" line="1" stmtstart="-1" sqlhandle="0x0400ff7f427f99d9010000000000000000000000000000000000000000000000000000000000000000000000">
sp_executesql    </frame>
                <frame procname="test_Event_6701.dbo.UpdateAttributeValidationCache" line="47" stmtstart="4398" stmtend="4500" sqlhandle="0x03000a0018bc1b7e4fb42301f0a9000001000000000000000000000000000000000000000000000000000000">
INSERT INTO #RequestRelation exec sp_executesql @sq    </frame>
                <frame procname="adhoc" line="1" stmtstart="242" sqlhandle="0x01000a00f5251b0990bf48b00500000000000000000000000000000000000000000000000000000000000000">
EXEC UpdateAttributeValidationCache  @validationIds=@p0,@OrgUnitCacheHi=@p1,@RequestOrgUnitCacheHi=@p2, @RequestId=@p3, @AuthorPositionId=@p4,@eventStartDate=@p5,@eventEndDate=@p6    </frame>
                <frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown    </frame>
            </executionStack>
            <inputbuf>
(@p0 [dbo].[Int_List] READONLY,@p1 bigint,@p2 bigint,@p3 bigint,@p4 nvarchar(4000),@p5 nvarchar(4000),@p6 nvarchar(4000))EXEC UpdateAttributeValidationCache  @validationIds=@p0,@OrgUnitCacheHi=@p1,@RequestOrgUnitCacheHi=@p2, @RequestId=@p3, @AuthorPositionId=@p4,@eventStartDate=@p5,@eventEndDate=@p6   </inputbuf>
        </process>
        <process id="process2c13848" taskpriority="0" logused="260956" waitresource="KEY: 10:72057597892755456 (ea7380e6da4f)" waittime="8719" ownerId="5769072" transactionname="user_transaction" lasttranstarted="2019-02-10T18:12:00.300" XDES="0x671eac3b0" lockMode="S" schedulerid="1" kpid="7140" status="suspended" spid="306" sbid="0" ecid="0" priority="0" trancount="1" lastbatchstarted="2019-02-10T18:12:10.020" lastbatchcompleted="2019-02-10T18:12:10.020" lastattention="1900-01-01T00:00:00.020" clientapp=".Net SqlClient Data Provider" hostname="Test" hostpid="7716" loginname="test" isolationlevel="read committed (2)" xactid="5769072" currentdb="10" currentdbname="test_Event_6701" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128056">
            <executionStack>
                <frame procname="adhoc" line="1" stmtend="498" sqlhandle="0x020000001ffb721bb57eb5027444ed4d9184e816c11833120000000000000000000000000000000000000000">
unknown    </frame>
                <frame procname="mssqlsystemresource.sys.sp_executesql" line="1" stmtstart="-1" sqlhandle="0x0400ff7f427f99d9010000000000000000000000000000000000000000000000000000000000000000000000">
sp_executesql    </frame>
                <frame procname="test_Event_6701.dbo.RunCustomerTypeRoleValidation" line="60" stmtstart="6434" stmtend="6536" sqlhandle="0x03000a008878d96e1cb42301f0a9000001000000000000000000000000000000000000000000000000000000">
INSERT INTO #RequestRelation exec sp_executesql @sq    </frame>
                <frame procname="adhoc" line="1" stmtstart="240" sqlhandle="0x01000a00a033940a409fb5b40500000000000000000000000000000000000000000000000000000000000000">
EXEC RunCustomerTypeRoleValidation  @ObjectTypeId=@p0, @RequestId=@p1,@batchId=@p2,@AuthorPositionId=@p3,@EffectiveDate=@p4,@EndDate=@p5,@isBatchChange=@p6    </frame>
                <frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown    </frame>
            </executionStack>
            <inputbuf>
(@p0 nvarchar(4000),@p1 bigint,@p2 nvarchar(4000),@p3 nvarchar(4000),@p4 nvarchar(4000),@p5 nvarchar(4000),@p6 smallint)EXEC RunCustomerTypeRoleValidation  @ObjectTypeId=@p0, @RequestId=@p1,@batchId=@p2,@AuthorPositionId=@p3,@EffectiveDate=@p4,@EndDate=@p5,@isBatchChange=@p6   </inputbuf>
        </process>
    </process-list>
    <resource-list>
        <keylock hobtid="72057597892755456" dbid="10" objectname="test_Event_6701.dbo.Requests" indexname="PK_Requests" id="lock4b1a2c480" mode="X" associatedObjectId="72057597892755456">
            <owner-list>
                <owner id="process2c13848" mode="X" />
            </owner-list>
            <waiter-list>
                <waiter id="process2db5c28" mode="S" requestType="wait" />
            </waiter-list>
        </keylock>
        <keylock hobtid="72057597892755456" dbid="10" objectname="test_Event_6701.dbo.Requests" indexname="PK_Requests" id="lock4b1a2c480" mode="X" associatedObjectId="72057597892755456">
            <owner-list>
                <owner id="process2db5c28" mode="S" requestType="wait" />
            </owner-list>
            <waiter-list>
                <waiter id="process2dceca8" mode="S" requestType="wait" />
            </waiter-list>
        </keylock>
        <keylock hobtid="72057597892755456" dbid="10" objectname="test_Event_6701.dbo.Requests" indexname="PK_Requests" id="lock64a436900" mode="X" associatedObjectId="72057597892755456">
            <owner-list>
                <owner id="process2dceca8" mode="X" />
            </owner-list>
            <waiter-list>
                <waiter id="process2c13848" mode="S" requestType="wait" />
            </waiter-list>
        </keylock>
    </resource-list>
</deadlock>

请有人帮助我了解此死锁问题以及如何解决。

预先感谢！

Answer 1

它看起来像是典型的Reader-Writer死锁。它指出从dbo.Requests表中读取的语句与对同一表执行某种形式的数据修改的另一条语句之间存在死锁。解决这种形式的死锁的简单方法是使用基于行版本的隔离级别，READ COMMITTED SNAPSHOT或SNAPSHOT

您可以了解有关此Transaction Locking and Row Versioning Guide

的更多信息

从WITH(SERIALIZABLE)表中选择任何记录时，您也可以尝试使用dbo.Requests，例如

select * from dbo.Requests WITH(SERIALIZABLE) where id=@id

3个进程的SQL Server死锁问题

1 个答案: