【发布时间】：2013-08-01 18:44:57
【问题描述】：
我正在解决我在生产环境中看到的一些死锁问题，我对此很陌生，但我觉得有些奇怪。所以我有下面的死锁图：
死锁右侧是更新，如下：
UPDATE order_sub_line SET sub_line_status = 300 WHERE order_sub_line_id = '75C387EC-A1A7-4587-9FA0-DD33A49009BC'
在我看来，此更新正在尝试获取 2 个页面锁定。 order_sub_line_id 是聚集索引。
这是否应该尝试获取 2 个页面锁，如果是，为什么？
其他信息：
死锁牺牲品是一个视图（连接了包括 order_sub_line 在内的其他几个表），它本质上是在该表上运行以下查询：
select top(50) * from order_sub_line osl where osl.sub_line_type = 1 and osl.sub_line_status < 375
order_sub_line 上除了 order_sub_line.order_sub_line_id 上的聚集主键索引之外没有任何索引
执行计划：
死锁 xml：
<deadlock-list>
<deadlock victim="process4224eccf8">
<process-list>
<process id="process4224eccf8" taskpriority="0" logused="0" waitresource="PAGE: 7:1:13448 " waittime="1628" ownerId="1683307923" transactionname="SELECT" lasttranstarted="2013-07-31T08:45:53.157" XDES="0x48afafc40" lockMode="S" schedulerid="2" kpid="1208" status="suspended" spid="151" sbid="0" ecid="15" priority="0" trancount="0" lastbatchstarted="2013-07-31T08:45:53.157" lastbatchcompleted="2013-07-31T08:45:53.157" lastattention="1900-01-01T00:00:00.157" clientapp="ExactaAOR" hostname="BASTIAN-PC" hostpid="7336" isolationlevel="read committed (2)" xactid="1683307923" currentdb="7" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128056">
<executionStack>
<frame procname="adhoc" line="1" stmtstart="72" sqlhandle="0x0200000055b04f0c4d136173c4d51458bdb5002bfe5801370000000000000000000000000000000000000000">
SELECT TOP (@p0) this_.TRANSPORT_CNTNR_ID as TRANSPORT1_9_0_, this_.CNTNR_NAME as CNTNR2_9_0_, this_.CNTNR_TYPE as CNTNR3_9_0_, this_.CNTNR_HEIGHT as CNTNR4_9_0_, this_.CNTNR_WIDTH as CNTNR5_9_0_, this_.CNTNR_DEPTH as CNTNR6_9_0_, this_.CNTNR_WEIGHT as CNTNR7_9_0_, this_.PARENT_CNTNR_ID as PARENT8_9_0_, this_.RESERVATION_LOC_ID as RESERVAT9_9_0_, this_.WORK_AREA_ID as WORK10_9_0_, this_.WORK_AREA_NAME as WORK11_9_0_, this_.GROUP_ID as GROUP12_9_0_, this_.RELEASE_STATUS as RELEASE13_9_0_, this_.RELEASE_TIME as RELEASE14_9_0_, this_.PRINT_STATUS as PRINT15_9_0_, this_.SUB_LINE_COUNT as SUB16_9_0_, this_.ORDER_ID as ORDER17_9_0_, this_.QTY_REQUESTED as QTY18_9_0_, this_.ORDER_NAME as ORDER19_9_0_, this_.ORDER_PRIORITY as ORDER20_9_0_, this_.ORDER_STATUS as ORDER21_9_0_, this_.ON_HOLD as ON22_9_0_, this_.DUE_DATE as DUE23_9_0_, this_.ORDER_SUB_LINE_STATUS as ORDER24_9_0_ FROM V_CARTON_RELEASE this_ WHERE (this_.RELEASE_STATUS = @p1 and this_.ORDER_SUB_LINE_STATUS < @p2) ORDER BY this_.RELEASE_TIME asc </frame>
<frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown </frame>
</executionStack>
<inputbuf>
(@p0 int,@p1 nvarchar(4000),@p2 int)SELECT TOP (@p0) this_.TRANSPORT_CNTNR_ID as TRANSPORT1_9_0_, this_.CNTNR_NAME as CNTNR2_9_0_, this_.CNTNR_TYPE as CNTNR3_9_0_, this_.CNTNR_HEIGHT as CNTNR4_9_0_, this_.CNTNR_WIDTH as CNTNR5_9_0_, this_.CNTNR_DEPTH as CNTNR6_9_0_, this_.CNTNR_WEIGHT as CNTNR7_9_0_, this_.PARENT_CNTNR_ID as PARENT8_9_0_, this_.RESERVATION_LOC_ID as RESERVAT9_9_0_, this_.WORK_AREA_ID as WORK10_9_0_, this_.WORK_AREA_NAME as WORK11_9_0_, this_.GROUP_ID as GROUP12_9_0_, this_.RELEASE_STATUS as RELEASE13_9_0_, this_.RELEASE_TIME as RELEASE14_9_0_, this_.PRINT_STATUS as PRINT15_9_0_, this_.SUB_LINE_COUNT as SUB16_9_0_, this_.ORDER_ID as ORDER17_9_0_, this_.QTY_REQUESTED as QTY18_9_0_, this_.ORDER_NAME as ORDER19_9_0_, this_.ORDER_PRIORITY as ORDER20_9_0_, this_.ORDER_STATUS as ORDER21_9_0_, this_.ON_HOLD as ON22_9_0_, this_.DUE_DATE as DUE23_9_0_, this_.ORDER_SUB_LINE_STATUS as ORDER24_9_0_ FROM V_CARTON_RELEASE this_ WHERE (this_.RELEASE_STATUS = @p1 and this_.ORDER_SUB_LINE_STATUS < @p2) ORDER </inputbuf>
</process>
<process id="process4bf7bdc38" taskpriority="0" logused="8608" waitresource="PAGE: 7:1:13447 " waittime="1616" ownerId="1683308190" transactionname="user_transaction" lasttranstarted="2013-07-31T08:45:53.450" XDES="0x4ebd456a8" lockMode="IX" schedulerid="1" kpid="6032" status="suspended" spid="85" sbid="0" ecid="0" priority="0" trancount="2" lastbatchstarted="2013-07-31T08:45:53.450" lastbatchcompleted="2013-07-31T08:45:53.450" lastattention="1900-01-01T00:00:00.450" clientapp="ExactaAOR" hostname="BASTIAN-PC" hostpid="7336" loginname="asapdb" isolationlevel="read committed (2)" xactid="1683308190" currentdb="7" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128056">
<executionStack>
<frame procname="adhoc" line="1" stmtstart="60" sqlhandle="0x02000000109639184c42e35fa55701e017640d83bd4818c30000000000000000000000000000000000000000">
UPDATE ORDER_SUB_LINE SET SUB_LINE_STATUS = @p0 WHERE ORDER_SUB_LINE_ID = @p1 </frame>
<frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown </frame>
</executionStack>
<inputbuf>
(@p0 int,@p1 uniqueidentifier)UPDATE ORDER_SUB_LINE SET SUB_LINE_STATUS = @p0 WHERE ORDER_SUB_LINE_ID = @p1 </inputbuf>
</process>
</process-list>
<resource-list>
<pagelock fileid="1" pageid="13448" dbid="7" subresource="FULL" objectname="Exactadb.dbo.order_sub_line" id="lock4cf017000" mode="IX" associatedObjectId="72057594460962816">
<owner-list>
<owner id="process4bf7bdc38" mode="IX"/>
</owner-list>
<waiter-list>
<waiter id="process4224eccf8" mode="S" requestType="wait"/>
</waiter-list>
</pagelock>
<pagelock fileid="1" pageid="13447" dbid="7" subresource="FULL" objectname="Exactadb.dbo.order_sub_line" id="lock4a4554500" mode="S" associatedObjectId="72057594460962816">
<owner-list>
<owner id="process4224eccf8" mode="S"/>
</owner-list>
<waiter-list>
<waiter id="process4bf7bdc38" mode="IX" requestType="wait"/>
</waiter-list>
</pagelock>
</resource-list>
</deadlock>
</deadlock-list>
【问题讨论】：
-
执行计划是什么样的？是否有键/索引查找？
-
请记住，聚集索引存储为 b 树，更新必须从根节点导航，通过任何中间级别到达叶节点。见msdn.microsoft.com/en-us/library/ms177443(v=sql.105).aspx
-
@AdamHaines 我已经发布了执行计划
-
您需要发布实际的死锁 XML，而不是图片。
-
@RemusRusanu 添加了 xml
标签： sql-server sql-server-2012 deadlock