我们在批处理作业上引入了SqlBulkCopy,该作业跨多个线程执行但现在正在出现间歇性死锁。我们没有使用表锁选项。正在插入的表具有聚簇索引。
每个线程都插入一个唯一的PortfolioSnapshotId(带有一批AssetIds)
在这种情况下,我们有什么方法可以安全地使用SqlBulkCopy吗?
下面的XML:
<event name="xml_deadlock_report" package="sqlserver" timestamp="2017-12-06T02:38:31.382Z">
<data name="xml_report">
<type name="xml" package="package0" />
<value>
<deadlock>
<victim-list>
<victimProcess id="process248e1c96108" />
</victim-list>
<process-list>
<process id="process248e1c96108" taskpriority="0" logused="63904" waitresource="PAGE: 14:1:289932632 " waittime="4523" ownerId="2409980792" transactionname="user_transaction" lasttranstarted="2017-12-06T02:38:26.657" XDES="0x2453d39ce58" lockMode="IX" schedulerid="14" kpid="24604" status="suspended" spid="151" sbid="0" ecid="0" priority="0" trancount="2" lastbatchstarted="2017-12-06T02:38:26.657" lastbatchcompleted="2017-12-06T02:38:26.657" lastattention="2017-12-06T02:38:23.760" clientapp="XXXX" hostname="XXXX" hostpid="137000" loginname="XXXX" isolationlevel="read committed (2)" xactid="2409980792" currentdb="14" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128056">
<executionStack>
<frame procname="adhoc" line="1" stmtend="1206" sqlhandle="0x020000000f2bea1e535f1cbf04ef8318984df8965399be020000000000000000000000000000000000000000">
unknown </frame>
</executionStack>
<inputbuf>
insert bulk TableName ([AssetId] NVarChar(255) COLLATE Latin1_General_CI_AS, [ParentAssetId] NVarChar(255) COLLATE Latin1_General_CI_AS, [PortfolioSnapshotId] UniqueIdentifier, [Quantity] Decimal(28,8), [CompressedProperties] VarBinary(max)) with (CHECK_CONSTRAINTS) </inputbuf>
</process>
<process id="process248e1c8cca8" taskpriority="0" logused="67244" waitresource="PAGE: 14:1:289933280 " waittime="4523" ownerId="2409980337" transactionname="user_transaction" lasttranstarted="2017-12-06T02:38:26.220" XDES="0x25e82396e58" lockMode="IX" schedulerid="2" kpid="33292" status="suspended" spid="158" sbid="0" ecid="0" priority="0" trancount="2" lastbatchstarted="2017-12-06T02:38:26.220" lastbatchcompleted="2017-12-06T02:38:26.220" lastattention="2017-12-06T02:38:24.507" clientapp="XXXX" hostname="XXXX" hostpid="137000" loginname="XXXX" isolationlevel="read committed (2)" xactid="2409980337" currentdb="14" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128056">
<executionStack>
<frame procname="adhoc" line="1" stmtend="1206" sqlhandle="0x020000000f2bea1e535f1cbf04ef8318984df8965399be020000000000000000000000000000000000000000">
unknown </frame>
</executionStack>
<inputbuf>
insert bulk TableName ([AssetId] NVarChar(255) COLLATE Latin1_General_CI_AS, [ParentAssetId] NVarChar(255) COLLATE Latin1_General_CI_AS, [PortfolioSnapshotId] UniqueIdentifier, [Quantity] Decimal(28,8), [CompressedProperties] VarBinary(max)) with (CHECK_CONSTRAINTS) </inputbuf>
</process>
</process-list>
<resource-list>
<pagelock fileid="1" pageid="289932632" dbid="14" subresource="FULL" objectname="XXXX.dbo.TableName" id="lock247f3004d00" mode="X" associatedObjectId="72057594048872448">
<owner-list>
<owner id="process248e1c8cca8" mode="X" />
</owner-list>
<waiter-list>
<waiter id="process248e1c96108" mode="IX" requestType="wait" />
</waiter-list>
</pagelock>
<pagelock fileid="1" pageid="289933280" dbid="14" subresource="FULL" objectname="XXXX.dbo.TableName" id="lock247f4f97c80" mode="X" associatedObjectId="72057594045661184">
<owner-list>
<owner id="process248e1c96108" mode="X" />
</owner-list>
<waiter-list>
<waiter id="process248e1c8cca8" mode="IX" requestType="wait" />
</waiter-list>
</pagelock>
</resource-list>
</deadlock>
</value>
</data>
</event>
表:
CREATE TABLE [dbo].[TableName](
[AssetId] [nvarchar](255) NOT NULL,
[ParentAssetId] [nvarchar](255) NULL,
[PortfolioSnapshotId] [uniqueidentifier] NOT NULL,
[Quantity] [decimal](28, 8) NULL,
[CompressedProperties] [varbinary](max) NULL
CONSTRAINT [PK_TableName] PRIMARY KEY CLUSTERED
(
[PortfolioSnapshotId] ASC,
[AssetId] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO
ALTER TABLE [dbo].[TableName] WITH CHECK ADD CONSTRAINT [FK_TableName_PortfolioSnapshot] FOREIGN KEY([PortfolioSnapshotId])
REFERENCES [dbo].[PortfolioStore_PortfolioSnapshot] ([Id])
CREATE NONCLUSTERED INDEX [IX_TableName_PortfolioSnapshotId] ON [dbo].[TableName]
(
[PortfolioSnapshotId] ASC
)
INCLUDE ( [AssetId],
[ParentAssetId],
[Quantity],
[Price]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
GO
答案 0 :(得分:2)
由于存在NC索引(来自同一对象名称的两个不同对象Id上的页锁IX-> X),因此发生死锁。考虑到聚集索引在同一个键上并且更具选择性,我不会看到NC索引的原因。我会删除那个NC索引。